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<a href="async__queue_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* Copyright (C) 2006 to 2013 Chris Vine</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"></span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">The library comprised in this file or of which this file is part is</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">distributed by Chris Vine under the GNU Lesser General Public</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">License as follows:</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"></span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> This library is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> modify it under the terms of the GNU Lesser General Public License</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> as published by the Free Software Foundation; either version 2.1 of</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"></span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> This library is distributed in the hope that it will be useful, but</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> Lesser General Public License, version 2.1, for more details.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"></span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> License, version 2.1, along with this library (see the file LGPL.TXT</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> which came with this source code package in the c++-gtk-utils</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> sub-directory); if not, write to the Free Software Foundation, Inc.,</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"></span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">However, it is not intended that the object code of a program whose</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">source code instantiates a template from this file or uses macros or</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">inline functions (of any length) should by reason only of that</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">instantiation or use be subject to the restrictions of use in the GNU</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">Lesser General Public License. With that in mind, the words "and</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">macros, inline functions and instantiations of templates (of any</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">length)" shall be treated as substituted for the words "and small</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">macros and small inline functions (ten lines or less in length)" in</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">the fourth paragraph of section 5 of that licence. This does not</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">affect any other reason why object code may be subject to the</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">restrictions in that licence (nor for the avoidance of doubt does it</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">affect the application of section 2 of that licence to modifications</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">of the source code in this file).</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"></span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"></span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * @file async_queue.h</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * @brief This file provides thread-safe asynchronous queue classes.</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * AsyncQueue is a class which provides some of the functionality of a</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * std::queue object (but note that the AsyncQueue::pop(value_type&</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * obj) and AsyncQueue::move_pop(value_type& obj) methods provide the</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * popped element by reference - see the comments on that method for</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * the reason), except that it has mutex locking of the data container</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * so as to permit pushing and popping from different threads. It is</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * therefore useful for passing data between threads, perhaps in</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * response to a signal being emitted from a Notifier object. Data</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * can be pushed or pulled by move constructor/move assignment</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * operator or by means of a std::unique_ptr object, SharedLockPtr</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * object or an IntrusivePtr object referencing data derived from</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * IntrusiveLockCounter.</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * AsyncQueueDispatch is a class which has blocking pop() and</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * move_pop() methods, which allows it to be waited on by a dedicated</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * event/message dispatching thread for incoming work (represented by</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * the data pushed onto the queue). In the same way, it can be used</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * to implement thread pools, by having threads in the pool waiting on</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * the queue.</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * By default the queues use a std::list object as their container</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * because when adding an item to the queue all allocation can take</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * place outside the queue object's mutex. However, for types which</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> * have low overhead copy or move constructors, this can be changed</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * to, say, a std::deque object by specifying it as the second</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * template parameter.</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#ifndef CGU_ASYNC_QUEUE_H</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor"></span><span class="preprocessor">#define CGU_ASYNC_QUEUE_H</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor">#include <queue></span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor">#include <list></span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#include <exception></span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#include <utility></span> <span class="comment">// for std::move and std::forward</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#include <algorithm></span> <span class="comment">// for std::swap</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor">#include <time.h></span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor">#include <<a class="code" href="mutex_8h.html" title="Provides wrapper classes for pthread mutexes and condition variables, and scoped locking classes for ...">c++-gtk-utils/mutex.h</a>></span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#include <<a class="code" href="thread_8h.html">c++-gtk-utils/thread.h</a>></span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#include <<a class="code" href="cgu__config_8h.html">c++-gtk-utils/cgu_config.h</a>></span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#ifdef CGU_USE_SCHED_YIELD</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor"></span><span class="preprocessor">#include <sched.h></span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor"></span><span class="preprocessor">#include <unistd.h></span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="keyword">namespace </span>Cgu {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"></span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> * @class AsyncQueuePopError async_queue.h c++-gtk-utils/async_queue.h</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> * @brief An exception thrown if calling pop() on a AsyncQueue or</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"> * AsyncQueueDispatch object fails because the queue is empty.</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> * @sa AsyncQueue AsyncQueueDispatch</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"><a class="code" href="structCgu_1_1AsyncQueuePopError.html"> 100</a></span> <span class="keyword">struct </span><a class="code" href="structCgu_1_1AsyncQueuePopError.html" title="An exception thrown if calling pop() on a AsyncQueue or AsyncQueueDispatch object fails because the q...">AsyncQueuePopError</a>: <span class="keyword">public</span> std::exception {</div>
<div class="line"><a name="l00101"></a><span class="lineno"><a class="code" href="structCgu_1_1AsyncQueuePopError.html#a976924246d3966773c1feded0b6f58d0"> 101</a></span>  <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="structCgu_1_1AsyncQueuePopError.html#a976924246d3966773c1feded0b6f58d0">what</a>() <span class="keyword">const</span> throw() {<span class="keywordflow">return</span> <span class="stringliteral">"AsyncQueuePopError: popping from empty AsyncQueue object\n"</span>;}</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> };</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"></span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> * @class AsyncQueue async_queue.h c++-gtk-utils/async_queue.h</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> * @brief A thread-safe asynchronous queue.</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> * @sa AsyncQueueDispatch AsyncResult</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> * AsyncQueue is a class which provides some of the functionality of a</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * std::queue object (but note that the AsyncQueue::pop(value_type&</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> * obj) and AsyncQueue::move_pop(value_type& obj) methods provide the</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> * popped element by reference - see the comments on that method for</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * the reason), except that it has mutex locking of the data container</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> * so as to permit pushing and popping from different threads. It is</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> * therefore useful for passing data between threads, perhaps in</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> * response to a signal being emitted from a Notifier object. Data</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> * can be pushed or pulled by move constructor/move assignment</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> * operator or by means of a std::unique_ptr object, SharedLockPtr</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> * object or an IntrusivePtr object referencing data derived from</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"> * IntrusiveLockCounter.</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> * By default the queue uses a std::list object as its container</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> * because when adding an item to the queue all allocation can take</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> * place outside the queue object's mutex. However, for types which</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> * have low overhead copy or move constructors, this can be changed</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> * to, say, a std::deque object by specifying it as the second</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> * template parameter.</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> * If the library is installed using the</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> * \--with-glib-memory-slices-compat or</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> * \--with-glib-memory-slices-no-compat configuration options, any</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> * AsyncQueue objects constructed on free store will be constructed in</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> * glib memory slices. This does not affect the queue container</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> * itself: to change the allocator of the C++ container, a custom</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"> * allocator type can be provided when the AsyncQueue object is</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"> * instantiated offering the standard allocator interface. If glib</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> * memory slices are not used or no AsyncQueue objects are constructed</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> * on free store, it is not necessary to call g_thread_init() before</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment"> * manipulating or using an AsyncQueue object in multiple threads, but</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="comment"> * prior to glib version 2.32 glib itself (and thus glib memory</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment"> * slices) are not thread safe unless that function has been called.</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div>
<div class="line"><a name="l00145"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html"> 145</a></span> <span class="keyword">template</span> <<span class="keyword">class</span> T, <span class="keyword">class</span> Container = std::list<T> > <span class="keyword">class </span><a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">AsyncQueue</a> {</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00147"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560"> 147</a></span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> Container::value_type <a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>;</div>
<div class="line"><a name="l00148"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a110f7920e3c27e198c7d1321ce414218"> 148</a></span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> Container::size_type <a class="code" href="classCgu_1_1AsyncQueue.html#a110f7920e3c27e198c7d1321ce414218">size_type</a>;</div>
<div class="line"><a name="l00149"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#abdde7f38278958e3b7a8fe9ff6cdb4af"> 149</a></span>  <span class="keyword">typedef</span> Container <a class="code" href="classCgu_1_1AsyncQueue.html#abdde7f38278958e3b7a8fe9ff6cdb4af">container_type</a>;</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keyword">mutable</span> <a class="code" href="classCgu_1_1Thread_1_1Mutex.html" title="A wrapper class for pthread mutexes. ">Thread::Mutex</a> mutex;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  std::queue<T, Container> q;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment">// this won't throw: it is for the user to ensure the arguments do not</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment">// refer to the same mutex object</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordtype">void</span> lock2(<a class="code" href="classCgu_1_1Thread_1_1Mutex.html" title="A wrapper class for pthread mutexes. ">Thread::Mutex</a>& m1, <a class="code" href="classCgu_1_1Thread_1_1Mutex.html" title="A wrapper class for pthread mutexes. ">Thread::Mutex</a>& m2) {</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  m1.<a class="code" href="classCgu_1_1Thread_1_1Mutex.html#a4117ae4f42f0972dcd286d2cbb7e014c">lock</a>();</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">for</span>(;;) {</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">if</span> (!m2.<a class="code" href="classCgu_1_1Thread_1_1Mutex.html#af19346cf724ffdc508f5fe54889e57a0">trylock</a>()) {</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  }</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  m1.<a class="code" href="classCgu_1_1Thread_1_1Mutex.html#ade61c52c94dd0ddbea64fe434708ac37">unlock</a>();</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="comment">// spin nicely</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="preprocessor">#ifdef CGU_USE_SCHED_YIELD</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="preprocessor"></span> sched_yield();</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="preprocessor"></span> usleep(10);</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="preprocessor"></span> m1.<a class="code" href="classCgu_1_1Thread_1_1Mutex.html#a4117ae4f42f0972dcd286d2cbb7e014c">lock</a>();</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="keyword">public</span>:<span class="comment"></span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> * Pushes an item onto the queue. This method has strong exception</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> * safety if the container is a std::list or std::deque container (the</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * default is std::list), except that if std::deque is used as the</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> * container and the copy constructor, move constructor, copy</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * assignment operator or move assignment operator of the queue item</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> * throws, it only gives the basic exception guarantee (and the basic</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> * guarantee is not given by std::deque if the queue item's move</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> * constructor throws and it uses a non-default allocator which does</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> * not provide for it to be CopyInsertable). It is thread safe.</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> * @param obj The item to be pushed onto the queue.</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"> * @exception std::bad_alloc The method might throw std::bad_alloc if</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"> * memory is exhausted and the system throws in that case. It might</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> * also throw if the copy constructor, move constructor, assignment</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"> * operator or move assignment operator of the queue item might throw.</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00189"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#ac65a23dc377d9f4e8c6d85756176ebe9"> 189</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#ac65a23dc377d9f4e8c6d85756176ebe9">push</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>& obj) {</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  q.push(obj);</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment"></span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment"> * Pushes an item onto the queue. This method has strong exception</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment"> * safety if the container is a std::list or std::deque container (the</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> * default is std::list), except that if std::deque is used as the</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment"> * container and the copy constructor, move constructor, copy</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment"> * assignment operator or move assignment operator of the queue item</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> * throws, it only gives the basic exception guarantee (and the basic</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> * guarantee is not given by std::deque if the queue item's move</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> * constructor throws and it uses a non-default allocator which does</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment"> * not provide for it to be CopyInsertable). It is thread safe.</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment"> * @param obj The item to be pushed onto the queue.</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment"> * @exception std::bad_alloc The method might throw std::bad_alloc if</span></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment"> * memory is exhausted and the system throws in that case. It might</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="comment"> * also throw if the copy constructor, move constructor, assignment</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="comment"> * operator or move assignment operator of the queue item might throw.</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="comment"> * Since 2.0.0-rc5</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#ad04e5005bc6d6e1f2529cec5769e1d51"> 212</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#ad04e5005bc6d6e1f2529cec5769e1d51">push</a>(<a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>&& obj) {</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  q.push(std::move(obj));</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment"></span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment"> * Pushes an item onto the queue by constructing it in place: that is,</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment"> * by passing to this method the item's constructor's arguments,</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment"> * rather than the item itself. This method has strong exception</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment"> * safety if the container is a std::list or std::deque container (the</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment"> * default is std::list). (Technically, for a std::deque container,</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment"> * emplace() only offers the same exception guarantees as does push(),</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment"> * namely only the basic guarantee where a copy or move of the queue</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"> * item throws during the call, but the purpose of emplace is to</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> * construct in place and any reasonable implementation will not copy</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"> * or move the queue item.) It is thread safe.</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"> * @param args The constructor arguments for the item to be pushed</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"> * onto the queue.</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * @exception std::bad_alloc The method might throw std::bad_alloc if</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> * memory is exhausted and the system throws in that case. It might</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"> * also throw if the item's constructor (including any of its</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> * constructor arguments) might throw when constructing the item.</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> * @note The constructor of the item pushed onto the queue must not</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> * access any of the methods of the same queue object, or a deadlock</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment"> * might occur.</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="comment"> * Since 2.0.0-rc5</span></div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keyword">template</span><<span class="keyword">class</span>... Args></div>
<div class="line"><a name="l00241"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#ab9da8e8ca782d41a893007cb8da2bf6e"> 241</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#ab9da8e8ca782d41a893007cb8da2bf6e">emplace</a>(Args&&... args) {</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  q.emplace(std::forward<Args>(args)...);</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  }</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment"></span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment"> * Pops an item from the queue. This method has strong exception</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment"> * safety if the container is a std::deque or std::list container (the</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment"> * default is std::list), provided the destructor of a contained item</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment"> * does not throw. It is thread safe.</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="comment"> * @param obj A value type reference to which the item at the front of</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment"> * the queue will be assigned.</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment"> * @exception AsyncQueuePopError If the queue is empty when a pop is</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="comment"> * attempted, this method will throw AsyncQueuePopError. It might</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="comment"> * also throw if the copy assignment operator of the queue item might</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="comment"> * throw. In order to complete pop operations atomically under a</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="comment"> * single lock and to retain strong exception safety, the object into</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment"> * which the popped data is to be placed is passed as an argument by</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="comment"> * reference (this avoids a copy from a temporary object after the</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="comment"> * data has been extracted from the queue, which would occur if the</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="comment"> * item extracted were returned by value). It might also throw if the</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment"> * destructor of the queue item might throw (but that should never</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> <span class="comment"> * happen), or if the empty() method of the container type throws</span></div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment"> * (which would not happen on any sane implementation).</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a0e69624d489703ab193ab6022b347ac0"> 266</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a0e69624d489703ab193ab6022b347ac0">pop</a>(<a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>& obj) {</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> <a class="code" href="structCgu_1_1AsyncQueuePopError.html" title="An exception thrown if calling pop() on a AsyncQueue or AsyncQueueDispatch object fails because the q...">AsyncQueuePopError</a>();</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  obj = q.front();</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  q.pop();</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  }</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment"></span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="comment"> * Pops an item from the queue using the contained type's move</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="comment"> * assignment operator, if it has one. This method is identical to</span></div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="comment"> * the pop() method if that type has no move assignment operator.</span></div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="comment"> * This method has strong exception safety if the container is a</span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="comment"> * std::deque or std::list container (the default is std::list),</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="comment"> * provided the destructor of a contained item does not throw and the</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> <span class="comment"> * move assignment operator of a contained item has strong exception</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment"> * safety. It is thread safe. Use this method in preference to the</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment"> * pop() method if it is known that the contained items' move</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment"> * assignment operator does not throw or is strongly exception safe,</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="comment"> * or if the use case does not require strong exception safety. This</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="comment"> * method must be used in place of the pop() method if the contained</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="comment"> * type has a move assignment operator but no copy assignment operator</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="comment"> * (such as a std::unique_ptr object).</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="comment"> * @param obj A value type reference to which the item at the front of</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="comment"> * the queue will be move assigned.</span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="comment"> * @exception AsyncQueuePopError If the queue is empty when a pop is</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="comment"> * attempted, this method will throw AsyncQueuePopError. It might</span></div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment"> * also throw if the move assignment operator of the queue item might</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="comment"> * throw, or if it has no move assignment operator and its copy</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="comment"> * assignment operator throws. In order to complete pop operations</span></div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="comment"> * atomically under a single lock and to retain strong exception</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="comment"> * safety, the object into which the popped data is to be placed is</span></div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="comment"> * passed as an argument by reference (this avoids a move from a</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> <span class="comment"> * temporary object after the data has been extracted from the queue,</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="comment"> * which would occur if the item extracted were returned by value).</span></div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> <span class="comment"> * It might also throw if the destructor of the queue item might throw</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="comment"> * (but that should never happen), or if the empty() method of the</span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="comment"> * container type throws (which would not happen on any sane</span></div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="comment"> * implementation).</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="comment"> * Since 2.0.11</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00307"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a7f65ae3492f70acb0db8b149192b0188"> 307</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a7f65ae3492f70acb0db8b149192b0188">move_pop</a>(<a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>& obj) {</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> <a class="code" href="structCgu_1_1AsyncQueuePopError.html" title="An exception thrown if calling pop() on a AsyncQueue or AsyncQueueDispatch object fails because the q...">AsyncQueuePopError</a>();</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  obj = std::move(q.front());</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  q.pop();</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  }</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="comment"></span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment"> * Discards the item at the front of the queue. This method has</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment"> * strong exception safety if the container is a std::deque or</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment"> * std::list container (the default is std::list), provided the</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment"> * destructor of a contained item does not throw. It is thread safe.</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment"> * @exception AsyncQueuePopError If the queue is empty when a pop is</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment"> * attempted, this method will throw AsyncQueuePopError. It might</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> <span class="comment"> * also throw if the destructor of the queue item might throw (but</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="comment"> * that should never happen), or if the empty() method of the</span></div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="comment"> * container type throws (which would not happen on any sane</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="comment"> * implementation).</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a8fdc1946551aac4d110d308f297f3222"> 326</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a8fdc1946551aac4d110d308f297f3222">pop</a>() {</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> <a class="code" href="structCgu_1_1AsyncQueuePopError.html" title="An exception thrown if calling pop() on a AsyncQueue or AsyncQueueDispatch object fails because the q...">AsyncQueuePopError</a>();</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  q.pop();</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  }</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="comment"></span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> <span class="comment"> * @return Whether the queue is empty. It will not throw assuming</span></div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> <span class="comment"> * that the empty() method of the container type does not throw, as it</span></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> <span class="comment"> * will not on any sane implementation.</span></div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <span class="comment"> * @note This method is thread safe, but the return value may not be</span></div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="comment"> * valid if another thread has pushed to or popped from the queue</span></div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment"> * before the value returned by the method is acted on. It is</span></div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="comment"> * provided as a utility, but may not be meaningful, depending on the</span></div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="comment"> * intended usage.</span></div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00342"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a453326732dd6b6ec9c18e2397d26c6cd"> 342</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a453326732dd6b6ec9c18e2397d26c6cd">empty</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">return</span> q.empty();</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="comment"></span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment"> * @return The number of items currently in the queue. It will not</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment"> * throw assuming that the size() method of the container type does</span></div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment"> * not throw, as it will not on any sane implementation.</span></div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment"> * @note This method is thread safe, but the return value may not be</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment"> * valid if another thread has pushed to or popped from the queue</span></div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment"> * before the value returned by the method is acted on. It is</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment"> * provided as a utility, but may not be meaningful, depending on the</span></div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="comment"> * intended usage.</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a443d62e1475c3e0d8aa0b49cb6e6a514"> 359</a></span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a110f7920e3c27e198c7d1321ce414218">size_type</a> <a class="code" href="classCgu_1_1AsyncQueue.html#a443d62e1475c3e0d8aa0b49cb6e6a514">size</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordflow">return</span> q.size();</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  }</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment"></span></div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="comment"> * Swaps the contents of 'this' and 'other'. It will not throw</span></div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="comment"> * assuming that the swap method of the container type does not throw</span></div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <span class="comment"> * (which the C++11 standard requires not to happen with the standard</span></div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="comment"> * sequence containers). It is thread safe and the swap is</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="comment"> * thread-wise atomic. A non-class function</span></div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="comment"> * Cgu::swap(Cgu::AsyncQueue&, Cgu::AsyncQueue&) method is also</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="comment"> * provided which will call this method.</span></div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="comment"> * @param other The object to be swapped with this one.</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a169609b9c64f109d8ee938b7e9e6f411"> 376</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a169609b9c64f109d8ee938b7e9e6f411">swap</a>(<a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">AsyncQueue</a>& other) {</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &other) {</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  lock2(mutex, other.mutex); <span class="comment">// doesn't throw</span></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> l1{mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> l2{other.mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  q.swap(other.q);</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  }</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  }</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="comment"></span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span> <span class="comment"> * The copy assignment operator is strongly exception safe with the</span></div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <span class="comment"> * standard sequence containers (it uses copy and swap). It is also</span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> <span class="comment"> * thread safe, as it safely locks both the assignor's and assignee's</span></div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="comment"> * mutex to provide a thread-wise atomic assignment.</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="comment"> * @param rhs The assignor.</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment"> * @return The AsyncQueue object after assignment.</span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment"> * @exception std::bad_alloc The copy constructor of the queue's</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment"> * container type, and so this assignment operator, might throw</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="comment"> * std::bad_alloc if memory is exhausted and the system throws in that</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="comment"> * case. This assignment operator will also throw if the copy</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="comment"> * constructor of the queue's container type throws any other</span></div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="comment"> * exceptions, including if any copy or move constructor or copy or</span></div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment"> * move assignment operator of a contained item throws.</span></div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="comment"> * @exception Thread::MutexError This assignment operator might throw</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="comment"> * Thread::MutexError if initialization of a transitional object's</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="comment"> * contained mutex fails. (It is often not worth checking for this,</span></div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="comment"> * as it means either memory is exhausted or pthread has run out of</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="comment"> * other resources to create new mutexes.)</span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a4f605e4ae66382f4450f5886b9f84d3c"> 407</a></span>  <a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">AsyncQueue</a>& <a class="code" href="classCgu_1_1AsyncQueue.html#a4f605e4ae66382f4450f5886b9f84d3c">operator=</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">AsyncQueue</a>& rhs) {</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &rhs) {</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  lock2(mutex, rhs.mutex); <span class="comment">// doesn't throw</span></div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> l1{mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> l2{rhs.mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  std::queue<T, Container> temp{rhs.q};</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  q.swap(temp);</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  }</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  }</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span> <span class="comment"></span></div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="comment"> * This move assignment operator is thread safe as regards the</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span> <span class="comment"> * assignee (the object moved to), but no synchronization is carried</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="comment"> * out with respect to the rvalue assignor/movant. This is because</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="comment"> * temporaries are only visible and accessible in the thread carrying</span></div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="comment"> * out the move operation and synchronization for them would represent</span></div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> <span class="comment"> * pointless overhead. In a case where the user uses std::move to</span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> <span class="comment"> * force a move from a named object, and that named object's lifetime</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="comment"> * is managed by (or the object is otherwise accessed by) a different</span></div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> <span class="comment"> * thread than the one making the move, the user must carry out her</span></div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span class="comment"> * own synchronization with respect to that different thread, both to</span></div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span> <span class="comment"> * ensure that a consistent view of the the named object is obtained</span></div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span> <span class="comment"> * and because that object will be mutated by the move. This method</span></div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span> <span class="comment"> * invokes std::queue's move assignment operator, and therefore has</span></div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span> <span class="comment"> * the same exception safety as the standard library's implementation</span></div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span> <span class="comment"> * of that operator. It will not normally throw unless a custom</span></div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> <span class="comment"> * allocator is used which throws on move assignment, or the</span></div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span> <span class="comment"> * destructor of a contained item throws.</span></div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span> <span class="comment"> * @param rhs The assignor/movant.</span></div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span> <span class="comment"> * @return The AsyncQueue object after move assignment.</span></div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00441"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a83e10ba4055b94df908d67a0a87d01c0"> 441</a></span>  <a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">AsyncQueue</a>& <a class="code" href="classCgu_1_1AsyncQueue.html#a83e10ba4055b94df908d67a0a87d01c0">operator=</a>(<a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">AsyncQueue</a>&& rhs) {</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  q = std::move(rhs.q);</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  }</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> <span class="comment"></span></div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span> <span class="comment"> * @exception std::bad_alloc The default constructor might throw</span></div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span> <span class="comment"> * std::bad_alloc if memory is exhausted and the system throws in that</span></div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span> <span class="comment"> * case.</span></div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span> <span class="comment"> * @exception Thread::MutexError The default constructor might throw</span></div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span> <span class="comment"> * Thread::MutexError if initialization of the contained mutex fails.</span></div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span> <span class="comment"> * (It is often not worth checking for this, as it means either memory</span></div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span> <span class="comment"> * is exhausted or pthread has run out of other resources to create</span></div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span> <span class="comment"> * new mutexes.)</span></div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span> <span class="comment"></span></div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span> <span class="comment"> * As regards thread safety, the move constructor does not synchronize</span></div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span> <span class="comment"> * with respect to the initializing rvalue. This is because</span></div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span> <span class="comment"> * temporaries are only visible and accessible in the thread carrying</span></div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span> <span class="comment"> * out the move operation and synchronization for them would represent</span></div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span> <span class="comment"> * pointless overhead. In a case where a user uses std::move to force</span></div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span> <span class="comment"> * a move from a named object, and that named object's lifetime is</span></div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span> <span class="comment"> * managed by (or the object is otherwise accessed by) a different</span></div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span> <span class="comment"> * thread than the one making the move, the user must carry out her</span></div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span> <span class="comment"> * own synchronization with respect to that different thread, both to</span></div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span> <span class="comment"> * ensure that a consistent view of the the named object is obtained</span></div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span> <span class="comment"> * and because that object will be mutated by the move.</span></div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="comment"> * @param rhs The AsyncQueue object to be moved.</span></div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span> <span class="comment"> * @exception Thread::MutexError The move constructor might throw</span></div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span> <span class="comment"> * Thread::MutexError if initialization of the contained mutex fails.</span></div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span> <span class="comment"> * If it does so this move constructor is strongly exception safe (if</span></div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span> <span class="comment"> * it is thrown, the object passed as an argument will be unchanged).</span></div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span> <span class="comment"> * (It is often not worth checking for this, as it means either memory</span></div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="comment"> * is exhausted or pthread has run out of other resources to create</span></div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> <span class="comment"> * new mutexes.) It might also throw if the queue's container type's</span></div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="comment"> * move constructor might throw, but it should not do that unless a</span></div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> <span class="comment"> * custom allocator is in use.</span></div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00484"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a0ef104b9974a263207b761d3a6b38d2b"> 484</a></span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a0ef104b9974a263207b761d3a6b38d2b">AsyncQueue</a>(<a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">AsyncQueue</a>&& rhs): q(std::move(rhs.q)) {}</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <span class="comment"></span></div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="comment"> * The copy constructor is thread safe, as it locks the initializing</span></div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="comment"> * object's mutex to obtain a consistent view of it.</span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> <span class="comment"> * @param rhs The AsyncQueue object to be copied.</span></div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span> <span class="comment"> * @exception std::bad_alloc The copy constructor of the queue's</span></div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> <span class="comment"> * container type, and so this constructor, might throw std::bad_alloc</span></div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <span class="comment"> * if memory is exhausted and the system throws in that case. It will</span></div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="comment"> * also throw if the copy constructor of the queue's container type</span></div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="comment"> * throws any other exceptions, including if any copy or move</span></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="comment"> * constructor or copy or move assignment operator of a contained item</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span> <span class="comment"> * throws.</span></div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> <span class="comment"> * @exception Thread::MutexError The copy constructor might throw</span></div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> <span class="comment"> * Thread::MutexError if initialization of the contained mutex fails.</span></div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="comment"> * (It is often not worth checking for this, as it means either memory</span></div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span> <span class="comment"> * is exhausted or pthread has run out of other resources to create</span></div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span> <span class="comment"> * new mutexes.)</span></div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <span class="comment">// we use the comma operator here to lock the mutex and call the</span></div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="comment">// copy constructor: the lock will be retained until the end of the</span></div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="comment">// full expression in which it is lexically situated, namely until</span></div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="comment">// the end of q's constructor - see C++11 1.9/10 and 12.2/3</span></div>
<div class="line"><a name="l00509"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#a95bf3562a7713608ca079db60f0f007b"> 509</a></span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a95bf3562a7713608ca079db60f0f007b">AsyncQueue</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">AsyncQueue</a>& rhs): q((Thread::Mutex::Lock(rhs.mutex), rhs.q)) {}</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span> <span class="comment"></span></div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span> <span class="comment"> * The destructor does not throw unless the destructor of a contained</span></div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="comment"> * item throws. It is thread safe (any thread may delete the</span></div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span> <span class="comment"> * AsyncQueue object).</span></div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00516"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueue.html#af90786907824e0e2471e9d120467a8a6"> 516</a></span>  <a class="code" href="classCgu_1_1AsyncQueue.html#af90786907824e0e2471e9d120467a8a6">~AsyncQueue</a>() {</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="comment">// lock and unlock the mutex in the destructor so that we have an</span></div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <span class="comment">// acquire operation to ensure that when the std::queue object is</span></div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  <span class="comment">// destroyed memory is synchronised, so any thread may destroy the</span></div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <span class="comment">// AsyncQueue object</span></div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  }</div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span> </div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span> <span class="comment">/* Only has effect if --with-glib-memory-slices-compat or</span></div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span> <span class="comment"> * --with-glib-memory-slices-no-compat option picked */</span></div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <a class="code" href="cgu__config_8h.html#a13241741f6a47356f61508faea37c35a">CGU_GLIB_MEMORY_SLICES_FUNCS</a></div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span> };</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span> <span class="comment"></span></div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span> <span class="comment"> * @class AsyncQueueDispatch async_queue.h c++-gtk-utils/async_queue.h</span></div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span> <span class="comment"> * @brief A thread-safe asynchronous queue with a blocking pop()</span></div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> <span class="comment"> * method.</span></div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span> <span class="comment"> * @sa AsyncQueue AsyncResult</span></div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span> <span class="comment"> * AsyncQueueDispatch is a class which has blocking pop_dispatch()</span></div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span> <span class="comment"> * and move_pop_dispatch() methods, which allows it to be waited on by a dedicated</span></div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span> <span class="comment"> * event/message dispatching thread for incoming work (represented by</span></div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span> <span class="comment"> * the data pushed onto the queue). In the same way, it can be used</span></div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span> <span class="comment"> * to implement thread pools, by having threads in the pool waiting on</span></div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span> <span class="comment"> * the queue. The AsyncResult class can be useful for passing results</span></div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span> <span class="comment"> * between threads in conjunction with AsyncQueueDispatch (the</span></div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span> <span class="comment"> * documentation on AsyncResult gives an example).</span></div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span> <span class="comment"> * By default the queue uses a std::list object as its container</span></div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span> <span class="comment"> * because when adding an item to the queue all allocation can take</span></div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span> <span class="comment"> * place outside the queue object's mutex. However, for types which</span></div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span> <span class="comment"> * have low overhead copy or move constructors, this can be changed</span></div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span> <span class="comment"> * to, say, a std::deque object by specifying it as the second</span></div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span> <span class="comment"> * template parameter.</span></div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span> <span class="comment"> * If the library is installed using the</span></div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span> <span class="comment"> * \--with-glib-memory-slices-compat or</span></div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span> <span class="comment"> * \--with-glib-memory-slices-no-compat configuration options, any</span></div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span> <span class="comment"> * AsyncQueueDispatch objects constructed on free store will be</span></div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span> <span class="comment"> * constructed in glib memory slices. This does not affect the queue</span></div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span> <span class="comment"> * container itself: to change the allocator of the C++ container, a</span></div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> <span class="comment"> * custom allocator type can be provided when the AsyncQueueDispatch</span></div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="comment"> * object is instantiated offering the standard allocator interface.</span></div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="comment"> * If glib memory slices are not used or no AsyncQueueDispatch objects</span></div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="comment"> * are constructed on free store, it is not necessary to call</span></div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span> <span class="comment"> * g_thread_init() before manipulating or using an AsyncQueueDispatch</span></div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span> <span class="comment"> * object in multiple threads, but prior to glib version 2.32 glib</span></div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span> <span class="comment"> * itself (and thus glib memory slices) are not thread safe unless</span></div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span> <span class="comment"> * that function has been called.</span></div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span> </div>
<div class="line"><a name="l00567"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html"> 567</a></span> <span class="keyword">template</span> <<span class="keyword">class</span> T, <span class="keyword">class</span> Container = std::list<T> > <span class="keyword">class </span><a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">AsyncQueueDispatch</a> {</div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00569"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879"> 569</a></span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> Container::value_type <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>;</div>
<div class="line"><a name="l00570"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a1a62475616b3a704633ba35964d73caa"> 570</a></span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> Container::size_type <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a1a62475616b3a704633ba35964d73caa">size_type</a>;</div>
<div class="line"><a name="l00571"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#aaec3264a39f49e88f2522d1d5f616331"> 571</a></span>  <span class="keyword">typedef</span> Container <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#aaec3264a39f49e88f2522d1d5f616331">container_type</a>;</div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <span class="keyword">mutable</span> <a class="code" href="classCgu_1_1Thread_1_1Mutex.html" title="A wrapper class for pthread mutexes. ">Thread::Mutex</a> mutex;</div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  <a class="code" href="classCgu_1_1Thread_1_1Cond.html" title="A wrapper class for pthread condition variables. ">Thread::Cond</a> cond;</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  std::queue<T, Container> q;</div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span> </div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span> <span class="comment">// this won't throw: it is for the user to ensure the arguments do not</span></div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span> <span class="comment">// refer to the same mutex object</span></div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keywordtype">void</span> lock2(<a class="code" href="classCgu_1_1Thread_1_1Mutex.html" title="A wrapper class for pthread mutexes. ">Thread::Mutex</a>& m1, <a class="code" href="classCgu_1_1Thread_1_1Mutex.html" title="A wrapper class for pthread mutexes. ">Thread::Mutex</a>& m2) {</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  m1.<a class="code" href="classCgu_1_1Thread_1_1Mutex.html#a4117ae4f42f0972dcd286d2cbb7e014c">lock</a>();</div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordflow">for</span>(;;) {</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  <span class="keywordflow">if</span> (!m2.<a class="code" href="classCgu_1_1Thread_1_1Mutex.html#af19346cf724ffdc508f5fe54889e57a0">trylock</a>()) {</div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  }</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  m1.<a class="code" href="classCgu_1_1Thread_1_1Mutex.html#ade61c52c94dd0ddbea64fe434708ac37">unlock</a>();</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <span class="comment">// spin nicely</span></div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span> <span class="preprocessor">#ifdef CGU_USE_SCHED_YIELD</span></div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span> <span class="preprocessor"></span> sched_yield();</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span> <span class="preprocessor"></span> usleep(10);</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span> <span class="preprocessor"></span> m1.<a class="code" href="classCgu_1_1Thread_1_1Mutex.html#a4117ae4f42f0972dcd286d2cbb7e014c">lock</a>();</div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  }</div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  }</div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span> <span class="keyword">public</span>:<span class="comment"></span></div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span> <span class="comment"> * Pushes an item onto the queue. This method has strong exception</span></div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span> <span class="comment"> * safety if the container is a std::list or std::deque container (the</span></div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span> <span class="comment"> * default is std::list), except that if std::deque is used as the</span></div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span> <span class="comment"> * container and the copy constructor, move constructor, copy</span></div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span> <span class="comment"> * assignment operator or move assignment operator of the queue item</span></div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span> <span class="comment"> * throws, it only gives the basic exception guarantee (and the basic</span></div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span> <span class="comment"> * guarantee is not given by std::deque if the queue item's move</span></div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span> <span class="comment"> * constructor throws and it uses a non-default allocator which does</span></div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span> <span class="comment"> * not provide for it to be CopyInsertable). It is thread safe.</span></div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span> <span class="comment"> * @param obj The item to be pushed onto the queue.</span></div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span> <span class="comment"> * @exception std::bad_alloc The method might throw std::bad_alloc if</span></div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span> <span class="comment"> * memory is exhausted and the system throws in that case. It might</span></div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span> <span class="comment"> * also throw if the copy constructor, move constructor, assignment</span></div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span> <span class="comment"> * operator or move assignment operator of the queue item might throw.</span></div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00612"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac087f3cb959c7ebdb930b7df5afc5483"> 612</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac087f3cb959c7ebdb930b7df5afc5483">push</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  q.push(obj);</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#ae538fe7d9f19a57aeb1affff36bc9b8d">signal</a>();</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  }</div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span> <span class="comment"></span></div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span> <span class="comment"> * Pushes an item onto the queue. This method has strong exception</span></div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span> <span class="comment"> * safety if the container is a std::list or std::deque container (the</span></div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span> <span class="comment"> * default is std::list), except that if std::deque is used as the</span></div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span> <span class="comment"> * container and the copy constructor, move constructor, copy</span></div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span> <span class="comment"> * assignment operator or move assignment operator of the queue item</span></div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span> <span class="comment"> * throws, it only gives the basic exception guarantee (and the basic</span></div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span> <span class="comment"> * guarantee is not given by std::deque if the queue item's move</span></div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span> <span class="comment"> * constructor throws and it uses a non-default allocator which does</span></div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span> <span class="comment"> * not provide for it to be CopyInsertable). It is thread safe.</span></div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span> <span class="comment"> * @param obj The item to be pushed onto the queue.</span></div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span> <span class="comment"> * @exception std::bad_alloc The method might throw std::bad_alloc if</span></div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span> <span class="comment"> * memory is exhausted and the system throws in that case. It might</span></div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span> <span class="comment"> * also throw if the copy constructor, move constructor, assignment</span></div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span> <span class="comment"> * operator or move assignment operator of the queue item might throw.</span></div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span> <span class="comment"> * Since 2.0.0-rc5</span></div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00636"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a6214872f0662b9e3593ded8b5b31e81f"> 636</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a6214872f0662b9e3593ded8b5b31e81f">push</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>&& obj) {</div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  q.push(std::move(obj));</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#ae538fe7d9f19a57aeb1affff36bc9b8d">signal</a>();</div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  }</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span> <span class="comment"></span></div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span> <span class="comment"> * Pushes an item onto the queue by constructing it in place: that is,</span></div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span> <span class="comment"> * by passing to this method the item's constructor's arguments,</span></div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span> <span class="comment"> * rather than the item itself. This method has strong exception</span></div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span> <span class="comment"> * safety if the container is a std::list or std::deque container (the</span></div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span> <span class="comment"> * default is std::list). (Technically, for a std::deque container,</span></div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span> <span class="comment"> * emplace() only offers the same exception guarantees as does push(),</span></div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span> <span class="comment"> * namely only the basic guarantee where a copy or move of the queue</span></div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span> <span class="comment"> * item throws during the call, but the purpose of emplace is to</span></div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span> <span class="comment"> * construct in place and any reasonable implementation will not copy</span></div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span> <span class="comment"> * or move the queue item.) It is thread safe.</span></div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span> <span class="comment"> * @param args The constructor arguments for the item to be pushed</span></div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span> <span class="comment"> * onto the queue.</span></div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span> <span class="comment"> * @exception std::bad_alloc The method might throw std::bad_alloc if</span></div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span> <span class="comment"> * memory is exhausted and the system throws in that case. It might</span></div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span> <span class="comment"> * also throw if the item's constructor (including any of its</span></div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span> <span class="comment"> * constructor arguments) might throw when constructing the item.</span></div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span> <span class="comment"> * @note The constructor of the item pushed onto the queue must not</span></div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span> <span class="comment"> * access any of the methods of the same queue object, or a deadlock</span></div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span> <span class="comment"> * might occur.</span></div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span> <span class="comment"> * Since 2.0.0-rc5</span></div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <span class="keyword">template</span><<span class="keyword">class</span>... Args></div>
<div class="line"><a name="l00666"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ae15b0851aecbf2330662bd6d57994895"> 666</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ae15b0851aecbf2330662bd6d57994895">emplace</a>(Args&&... args) {</div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  q.emplace(std::forward<Args>(args)...);</div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#ae538fe7d9f19a57aeb1affff36bc9b8d">signal</a>();</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  }</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span> <span class="comment"></span></div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span> <span class="comment"> * Pops an item from the queue. This method has strong exception</span></div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span> <span class="comment"> * safety if the container is a std::deque or std::list container (the</span></div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span> <span class="comment"> * default is std::list), provided the destructor of a contained item</span></div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span> <span class="comment"> * does not throw. It is thread safe.</span></div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span> <span class="comment"> * @param obj A value type reference to which the item at the front of</span></div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span> <span class="comment"> * the queue will be assigned.</span></div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span> <span class="comment"> * @exception AsyncQueuePopError If the queue is empty when a pop is</span></div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span> <span class="comment"> * attempted, this method will throw AsyncQueuePopError. It might</span></div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span> <span class="comment"> * also throw if the copy assignment operator of the queue item might</span></div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span> <span class="comment"> * throw. In order to complete pop operations atomically under a</span></div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span> <span class="comment"> * single lock and to retain strong exception safety, the object into</span></div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span> <span class="comment"> * which the popped data is to be placed is passed as an argument by</span></div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span> <span class="comment"> * reference (this avoids a copy from a temporary object after the</span></div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span> <span class="comment"> * data has been extracted from the queue, which would occur if the</span></div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span> <span class="comment"> * item extracted were returned by value). It might also throw if the</span></div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span> <span class="comment"> * destructor of the queue item might throw (but that should never</span></div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span> <span class="comment"> * happen), or if the empty() method of the container type throws</span></div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span> <span class="comment"> * (which would not happen on any sane implementation).</span></div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00692"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a2d1a72af09ca8dfff44d37e62d788338"> 692</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a2d1a72af09ca8dfff44d37e62d788338">pop</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> <a class="code" href="structCgu_1_1AsyncQueuePopError.html" title="An exception thrown if calling pop() on a AsyncQueue or AsyncQueueDispatch object fails because the q...">AsyncQueuePopError</a>();</div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  obj = q.front();</div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  q.pop();</div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  }</div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span> <span class="comment"></span></div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span> <span class="comment"> * Pops an item from the queue using the contained type's move</span></div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span> <span class="comment"> * assignment operator, if it has one. This method is identical to</span></div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span> <span class="comment"> * the pop() method if that type has no move assignment operator.</span></div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span> <span class="comment"> * This method has strong exception safety if the container is a</span></div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span> <span class="comment"> * std::deque or std::list container (the default is std::list),</span></div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span> <span class="comment"> * provided the destructor of a contained item does not throw and the</span></div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span> <span class="comment"> * move assignment operator of a contained item has strong exception</span></div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span> <span class="comment"> * safety. It is thread safe. Use this method in preference to the</span></div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span> <span class="comment"> * pop() method if it is known that the contained items' move</span></div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span> <span class="comment"> * assignment operator does not throw or is strongly exception safe,</span></div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span> <span class="comment"> * or if the use case does not require strong exception safety. This</span></div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span> <span class="comment"> * method must be used in place of the pop() method if the contained</span></div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span> <span class="comment"> * type has a move assignment operator but no copy assignment operator</span></div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span> <span class="comment"> * (such as a std::unique_ptr object).</span></div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span> <span class="comment"> * @param obj A value type reference to which the item at the front of</span></div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span> <span class="comment"> * the queue will be move assigned.</span></div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span> <span class="comment"> * @exception AsyncQueuePopError If the queue is empty when a pop is</span></div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span> <span class="comment"> * attempted, this method will throw AsyncQueuePopError. It might</span></div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span> <span class="comment"> * also throw if the move assignment operator of the queue item might</span></div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span> <span class="comment"> * throw, or if it has no move assignment operator and its copy</span></div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span> <span class="comment"> * assignment operator throws. In order to complete pop operations</span></div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span> <span class="comment"> * atomically under a single lock and to retain strong exception</span></div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span> <span class="comment"> * safety, the object into which the popped data is to be placed is</span></div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span> <span class="comment"> * passed as an argument by reference (this avoids a move from a</span></div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span> <span class="comment"> * temporary object after the data has been extracted from the queue,</span></div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span> <span class="comment"> * which would occur if the item extracted were returned by value).</span></div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span> <span class="comment"> * It might also throw if the destructor of the queue item might throw</span></div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span> <span class="comment"> * (but that should never happen), or if the empty() method of the</span></div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span> <span class="comment"> * container type throws (which would not happen on any sane</span></div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span> <span class="comment"> * implementation).</span></div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span> <span class="comment"> * Since 2.0.11</span></div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00733"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a07a4d13f035e371299a3404a1a00ac8a"> 733</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a07a4d13f035e371299a3404a1a00ac8a">move_pop</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> <a class="code" href="structCgu_1_1AsyncQueuePopError.html" title="An exception thrown if calling pop() on a AsyncQueue or AsyncQueueDispatch object fails because the q...">AsyncQueuePopError</a>();</div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  obj = std::move(q.front());</div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  q.pop();</div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  }</div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span> <span class="comment"></span></div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span> <span class="comment"> * Pops an item from the queue. If the queue is empty, it will block</span></div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span> <span class="comment"> * until an item becomes available. If it blocks, the wait comprises</span></div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span> <span class="comment"> * a cancellation point. This method is cancellation safe if the</span></div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span> <span class="comment"> * stack unwinds on cancellation, as cancellation is blocked while the</span></div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span> <span class="comment"> * queue is being operated on after coming out of a wait. This method</span></div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span> <span class="comment"> * has strong exception safety if the container is a std::deque or</span></div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span> <span class="comment"> * std::list container (the default is std::list), provided the</span></div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span> <span class="comment"> * destructor of a contained item does not throw. It is thread safe.</span></div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span> <span class="comment"> * @param obj A value type reference to which the item at the front of</span></div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span> <span class="comment"> * the queue will be assigned. This method might throw if the copy</span></div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span> <span class="comment"> * assignment operator of the queue item might throw. In order to</span></div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span> <span class="comment"> * complete pop operations atomically under a single lock and to</span></div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span> <span class="comment"> * retain strong exception safety, the object into which the popped</span></div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span> <span class="comment"> * data is to be placed is passed as an argument by reference (this</span></div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span> <span class="comment"> * avoids a copy from a temporary object after the data has been</span></div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span> <span class="comment"> * extracted from the queue, which would occur if the item extracted</span></div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span> <span class="comment"> * were returned by value). It might also throw if the destructor of</span></div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span> <span class="comment"> * the queue item might throw (but that should never happen), or if</span></div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span> <span class="comment"> * the empty() method of the container type throws (which would not</span></div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span> <span class="comment"> * happen on any sane implementation).</span></div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00762"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a2ab1ff7c9ccd5b37feabae6b45385512"> 762</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a2ab1ff7c9ccd5b37feabae6b45385512">pop_dispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  <span class="keywordflow">while</span> (q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a5eda52c227552555102bb45010a8f6c9">wait</a>(mutex);</div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <a class="code" href="classCgu_1_1Thread_1_1CancelBlock.html" title="A class enabling the cancellation state of a thread to be controlled. ">Thread::CancelBlock</a> b;</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  obj = q.front();</div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  q.pop();</div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  } </div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span> <span class="comment"></span></div>
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00771"></a><span class="lineno"> 771</span> <span class="comment"> * Pops an item from the queue using the contained type's move</span></div>
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span> <span class="comment"> * assignment operator, if it has one (this method is identical to the</span></div>
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span> <span class="comment"> * pop_dispatch() method if that type has no move assignment</span></div>
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span> <span class="comment"> * operator). If the queue is empty, it will block until an item</span></div>
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span> <span class="comment"> * becomes available. If it blocks, the wait comprises a cancellation</span></div>
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span> <span class="comment"> * point. This method is cancellation safe if the stack unwinds on</span></div>
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span> <span class="comment"> * cancellation, as cancellation is blocked while the queue is being</span></div>
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span> <span class="comment"> * operated on after coming out of a wait. This method has strong</span></div>
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span> <span class="comment"> * exception safety if the container is a std::deque or std::list</span></div>
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span> <span class="comment"> * container (the default is std::list), provided the destructor of a</span></div>
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span> <span class="comment"> * contained item does not throw and the move assignment operator of a</span></div>
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span> <span class="comment"> * contained item has strong exception safety. It is thread safe.</span></div>
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span> <span class="comment"> * Use this method in preference to the pop_dispatch() method if it is</span></div>
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span> <span class="comment"> * known that the contained items' move assignment operator does not</span></div>
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span> <span class="comment"> * throw or is strongly exception safe, or if the use case does not</span></div>
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span> <span class="comment"> * require strong exception safety. This method must be used in place</span></div>
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span> <span class="comment"> * of the pop_dispatch() method if the contained type has a move</span></div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span> <span class="comment"> * assignment operator but no copy assignment operator (such as a</span></div>
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span> <span class="comment"> * std::unique_ptr object).</span></div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span> <span class="comment"> * @param obj A value type reference to which the item at the front of</span></div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span> <span class="comment"> * the queue will be move assigned. This method might throw if the</span></div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span> <span class="comment"> * move assignment operator of the queue item might throw, or if it</span></div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span> <span class="comment"> * has no move assignment operator and its copy assignment operator</span></div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span> <span class="comment"> * throws. In order to complete pop operations atomically under a</span></div>
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span> <span class="comment"> * single lock and to retain strong exception safety, the object into</span></div>
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span> <span class="comment"> * which the popped data is to be placed is passed as an argument by</span></div>
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span> <span class="comment"> * reference (this avoids a move from a temporary object after the</span></div>
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span> <span class="comment"> * data has been extracted from the queue, which would occur if the</span></div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span> <span class="comment"> * item extracted were returned by value). It might also throw if the</span></div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span> <span class="comment"> * destructor of the queue item might throw (but that should never</span></div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span> <span class="comment"> * happen), or if the empty() method of the container type throws</span></div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span> <span class="comment"> * (which would not happen on any sane implementation).</span></div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span> <span class="comment"> * Since 2.0.11</span></div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00806"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a3527f334c16d5ee180045ab7aa2f5867"> 806</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a3527f334c16d5ee180045ab7aa2f5867">move_pop_dispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  <span class="keywordflow">while</span> (q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a5eda52c227552555102bb45010a8f6c9">wait</a>(mutex);</div>
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <a class="code" href="classCgu_1_1Thread_1_1CancelBlock.html" title="A class enabling the cancellation state of a thread to be controlled. ">Thread::CancelBlock</a> b;</div>
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  obj = std::move(q.front());</div>
<div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  q.pop();</div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  } </div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span> <span class="comment"></span></div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span> <span class="comment"> * Pops an item from the queue. If the queue is empty, it will block</span></div>
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span> <span class="comment"> * until an item becomes available or until the timeout expires. If</span></div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span> <span class="comment"> * it blocks, the wait comprises a cancellation point. This method is</span></div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span> <span class="comment"> * cancellation safe if the stack unwinds on cancellation, as</span></div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span> <span class="comment"> * cancellation is blocked while the queue is being operated on after</span></div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span> <span class="comment"> * coming out of a wait. This method has strong exception safety if</span></div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span> <span class="comment"> * the container is a std::deque or std::list container (the default</span></div>
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span> <span class="comment"> * is std::list), provided the destructor of a contained item does not</span></div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span> <span class="comment"> * throw. It is thread safe.</span></div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span> <span class="comment"> * @param obj A value type reference to which the item at the front of</span></div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span> <span class="comment"> * the queue will be assigned. This method might throw if the copy</span></div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span> <span class="comment"> * assignment operator of the queue item might throw. In order to</span></div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span> <span class="comment"> * complete pop operations atomically under a single lock and to</span></div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span> <span class="comment"> * retain strong exception safety, the object into which the popped</span></div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span> <span class="comment"> * data is to be placed is passed as an argument by reference (this</span></div>
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span> <span class="comment"> * avoids a copy from a temporary object after the data has been</span></div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span> <span class="comment"> * extracted from the queue, which would occur if the item extracted</span></div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span> <span class="comment"> * were returned by value). It might also throw if the destructor of</span></div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span> <span class="comment"> * the queue item might throw (but that should never happen), or if</span></div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span> <span class="comment"> * the empty() method of the container type throws (which would not</span></div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span> <span class="comment"> * happen on any sane implementation).</span></div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span> <span class="comment"> * @param millisec The timeout interval, in milliseconds.</span></div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span> <span class="comment"> * @return If the timeout expires without an item becoming available,</span></div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span> <span class="comment"> * the method will return true. If an item from the queue is</span></div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span> <span class="comment"> * extracted, it returns false.</span></div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00841"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a9053b2a8505c61793c3cd932142d70b9"> 841</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a9053b2a8505c61793c3cd932142d70b9">pop_timed_dispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> millisec) {</div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  timespec ts;</div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  <a class="code" href="classCgu_1_1Thread_1_1Cond.html#a47b4f8f92444dd9b806002fa4c64a5c7">Thread::Cond::get_abs_time</a>(ts, millisec);</div>
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  <span class="keywordflow">while</span> (q.empty()) {</div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  <span class="keywordflow">if</span> (cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a5fb1c146498f23163d76e830b133df71">timed_wait</a>(mutex, ts)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  }</div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  <a class="code" href="classCgu_1_1Thread_1_1CancelBlock.html" title="A class enabling the cancellation state of a thread to be controlled. ">Thread::CancelBlock</a> b;</div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  obj = q.front();</div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  q.pop();</div>
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00852"></a><span class="lineno"> 852</span>  }</div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span> <span class="comment"></span></div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span> <span class="comment"> * Pops an item from the queue using the contained type's move</span></div>
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span> <span class="comment"> * assignment operator, if it has one (this method is identical to the</span></div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span> <span class="comment"> * pop_timed_dispatch() method if that type has no move assignment</span></div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span> <span class="comment"> * operator). If the queue is empty, it will block until an item</span></div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span> <span class="comment"> * becomes available or until the timeout expires. If it blocks, the</span></div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span> <span class="comment"> * wait comprises a cancellation point. This method is cancellation</span></div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span> <span class="comment"> * safe if the stack unwinds on cancellation, as cancellation is</span></div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span> <span class="comment"> * blocked while the queue is being operated on after coming out of a</span></div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span> <span class="comment"> * wait. This method has strong exception safety if the container is</span></div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span> <span class="comment"> * a std::deque or std::list container (the default is std::list),</span></div>
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span> <span class="comment"> * provided the destructor of a contained item does not throw and the</span></div>
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span> <span class="comment"> * move assignment operator of a contained item has strong exception</span></div>
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span> <span class="comment"> * safety. It is thread safe. Use this method in preference to the</span></div>
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span> <span class="comment"> * pop_timed_dispatch() method if it is known that the contained</span></div>
<div class="line"><a name="l00869"></a><span class="lineno"> 869</span> <span class="comment"> * items' move assignment operator does not throw or is strongly</span></div>
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span> <span class="comment"> * exception safe, or if the use case does not require strong</span></div>
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span> <span class="comment"> * exception safety. This method must be used in place of the</span></div>
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span> <span class="comment"> * pop_timed_dispatch() method if the contained type has a move</span></div>
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span> <span class="comment"> * assignment operator but no copy assignment operator (such as a</span></div>
<div class="line"><a name="l00874"></a><span class="lineno"> 874</span> <span class="comment"> * std::unique_ptr object).</span></div>
<div class="line"><a name="l00875"></a><span class="lineno"> 875</span> <span class="comment"> * @param obj A value type reference to which the item at the front of</span></div>
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span> <span class="comment"> * the queue will be move assigned. This method might throw if the</span></div>
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span> <span class="comment"> * move assignment operator of the queue item might throw, or if it</span></div>
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span> <span class="comment"> * has no move assignment operator and its copy assignment operator</span></div>
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span> <span class="comment"> * throws. In order to complete pop operations atomically under a</span></div>
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span> <span class="comment"> * single lock and to retain strong exception safety, the object into</span></div>
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span> <span class="comment"> * which the popped data is to be placed is passed as an argument by</span></div>
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span> <span class="comment"> * reference (this avoids a move from a temporary object after the</span></div>
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span> <span class="comment"> * data has been extracted from the queue, which would occur if the</span></div>
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span> <span class="comment"> * item extracted were returned by value). It might also throw if the</span></div>
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span> <span class="comment"> * destructor of the queue item might throw (but that should never</span></div>
<div class="line"><a name="l00886"></a><span class="lineno"> 886</span> <span class="comment"> * happen), or if the empty() method of the container type throws</span></div>
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span> <span class="comment"> * (which would not happen on any sane implementation).</span></div>
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span> <span class="comment"> * @param millisec The timeout interval, in milliseconds.</span></div>
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span> <span class="comment"> * @return If the timeout expires without an item becoming available,</span></div>
<div class="line"><a name="l00890"></a><span class="lineno"> 890</span> <span class="comment"> * the method will return true. If an item from the queue is</span></div>
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span> <span class="comment"> * extracted, it returns false.</span></div>
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span> <span class="comment"> * Since 2.0.11</span></div>
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00895"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ad9142c4eb251f4646261722b1def46ca"> 895</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ad9142c4eb251f4646261722b1def46ca">move_pop_timed_dispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> millisec) {</div>
<div class="line"><a name="l00896"></a><span class="lineno"> 896</span>  timespec ts;</div>
<div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  <a class="code" href="classCgu_1_1Thread_1_1Cond.html#a47b4f8f92444dd9b806002fa4c64a5c7">Thread::Cond::get_abs_time</a>(ts, millisec);</div>
<div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  <span class="keywordflow">while</span> (q.empty()) {</div>
<div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  <span class="keywordflow">if</span> (cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a5fb1c146498f23163d76e830b133df71">timed_wait</a>(mutex, ts)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  }</div>
<div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  <a class="code" href="classCgu_1_1Thread_1_1CancelBlock.html" title="A class enabling the cancellation state of a thread to be controlled. ">Thread::CancelBlock</a> b;</div>
<div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  obj = std::move(q.front());</div>
<div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  q.pop();</div>
<div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  }</div>
<div class="line"><a name="l00907"></a><span class="lineno"> 907</span> <span class="comment"></span></div>
<div class="line"><a name="l00908"></a><span class="lineno"> 908</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00909"></a><span class="lineno"> 909</span> <span class="comment"> * Discards the item at the front of the queue. This method has</span></div>
<div class="line"><a name="l00910"></a><span class="lineno"> 910</span> <span class="comment"> * strong exception safety if the container is a std::deque or</span></div>
<div class="line"><a name="l00911"></a><span class="lineno"> 911</span> <span class="comment"> * std::list container (the default is std::list), provided the</span></div>
<div class="line"><a name="l00912"></a><span class="lineno"> 912</span> <span class="comment"> * destructor of a contained item does not throw. It is thread safe.</span></div>
<div class="line"><a name="l00913"></a><span class="lineno"> 913</span> <span class="comment"> * @exception AsyncQueuePopError If the queue is empty when a pop is</span></div>
<div class="line"><a name="l00914"></a><span class="lineno"> 914</span> <span class="comment"> * attempted, this method will throw AsyncQueuePopError. It might</span></div>
<div class="line"><a name="l00915"></a><span class="lineno"> 915</span> <span class="comment"> * also throw if the destructor of the queue item might throw (but</span></div>
<div class="line"><a name="l00916"></a><span class="lineno"> 916</span> <span class="comment"> * that should never happen), or if the empty() method of the</span></div>
<div class="line"><a name="l00917"></a><span class="lineno"> 917</span> <span class="comment"> * container type throws (which would not happen on any sane</span></div>
<div class="line"><a name="l00918"></a><span class="lineno"> 918</span> <span class="comment"> * implementation).</span></div>
<div class="line"><a name="l00919"></a><span class="lineno"> 919</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00920"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a70d32d20e0dc0d431b277de3e9478540"> 920</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a70d32d20e0dc0d431b277de3e9478540">pop</a>() {</div>
<div class="line"><a name="l00921"></a><span class="lineno"> 921</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00922"></a><span class="lineno"> 922</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> <a class="code" href="structCgu_1_1AsyncQueuePopError.html" title="An exception thrown if calling pop() on a AsyncQueue or AsyncQueueDispatch object fails because the q...">AsyncQueuePopError</a>();</div>
<div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  q.pop();</div>
<div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  }</div>
<div class="line"><a name="l00925"></a><span class="lineno"> 925</span> <span class="comment"></span></div>
<div class="line"><a name="l00926"></a><span class="lineno"> 926</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00927"></a><span class="lineno"> 927</span> <span class="comment"> * @return Whether the queue is empty. It will not throw assuming</span></div>
<div class="line"><a name="l00928"></a><span class="lineno"> 928</span> <span class="comment"> * that the empty() method of the container type does not throw, as it</span></div>
<div class="line"><a name="l00929"></a><span class="lineno"> 929</span> <span class="comment"> * will not on any sane implementation.</span></div>
<div class="line"><a name="l00930"></a><span class="lineno"> 930</span> <span class="comment"> * @note This method is thread safe, but the return value may not be</span></div>
<div class="line"><a name="l00931"></a><span class="lineno"> 931</span> <span class="comment"> * valid if another thread has pushed to or popped from the queue</span></div>
<div class="line"><a name="l00932"></a><span class="lineno"> 932</span> <span class="comment"> * before the value returned by the method is acted on. It is</span></div>
<div class="line"><a name="l00933"></a><span class="lineno"> 933</span> <span class="comment"> * provided as a utility, but may not be meaningful, depending on the</span></div>
<div class="line"><a name="l00934"></a><span class="lineno"> 934</span> <span class="comment"> * intended usage.</span></div>
<div class="line"><a name="l00935"></a><span class="lineno"> 935</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00936"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#acd599f1028f8667898bbda0dda3a6781"> 936</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#acd599f1028f8667898bbda0dda3a6781">empty</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00938"></a><span class="lineno"> 938</span>  <span class="keywordflow">return</span> q.empty();</div>
<div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  }</div>
<div class="line"><a name="l00940"></a><span class="lineno"> 940</span> <span class="comment"></span></div>
<div class="line"><a name="l00941"></a><span class="lineno"> 941</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00942"></a><span class="lineno"> 942</span> <span class="comment"> * @return The number of items currently in the queue. It will not</span></div>
<div class="line"><a name="l00943"></a><span class="lineno"> 943</span> <span class="comment"> * throw assuming that the size() method of the container type does</span></div>
<div class="line"><a name="l00944"></a><span class="lineno"> 944</span> <span class="comment"> * not throw, as it will not on any sane implementation.</span></div>
<div class="line"><a name="l00945"></a><span class="lineno"> 945</span> <span class="comment"> * @note This method is thread safe, but the return value may not be</span></div>
<div class="line"><a name="l00946"></a><span class="lineno"> 946</span> <span class="comment"> * valid if another thread has pushed to or popped from the queue</span></div>
<div class="line"><a name="l00947"></a><span class="lineno"> 947</span> <span class="comment"> * before the value returned by the method is acted on. It is</span></div>
<div class="line"><a name="l00948"></a><span class="lineno"> 948</span> <span class="comment"> * provided as a utility, but may not be meaningful, depending on the</span></div>
<div class="line"><a name="l00949"></a><span class="lineno"> 949</span> <span class="comment"> * intended usage.</span></div>
<div class="line"><a name="l00950"></a><span class="lineno"> 950</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00951"></a><span class="lineno"> 951</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l00952"></a><span class="lineno"> 952</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00953"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a049b5ee1862149123575e942f5ccbd60"> 953</a></span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a1a62475616b3a704633ba35964d73caa">size_type</a> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a049b5ee1862149123575e942f5ccbd60">size</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  <span class="keywordflow">return</span> q.size();</div>
<div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  }</div>
<div class="line"><a name="l00957"></a><span class="lineno"> 957</span> <span class="comment"></span></div>
<div class="line"><a name="l00958"></a><span class="lineno"> 958</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00959"></a><span class="lineno"> 959</span> <span class="comment"> * Swaps the contents of 'this' and 'other'. It will not throw</span></div>
<div class="line"><a name="l00960"></a><span class="lineno"> 960</span> <span class="comment"> * assuming that the swap method of the container type does not throw</span></div>
<div class="line"><a name="l00961"></a><span class="lineno"> 961</span> <span class="comment"> * (which the C++11 standard requires not to happen with the standard</span></div>
<div class="line"><a name="l00962"></a><span class="lineno"> 962</span> <span class="comment"> * sequence containers). It is thread safe and the swap is</span></div>
<div class="line"><a name="l00963"></a><span class="lineno"> 963</span> <span class="comment"> * thread-wise atomic. A non-class function</span></div>
<div class="line"><a name="l00964"></a><span class="lineno"> 964</span> <span class="comment"> * Cgu::swap(Cgu::AsyncQueue&, Cgu::AsyncQueue&) method is also</span></div>
<div class="line"><a name="l00965"></a><span class="lineno"> 965</span> <span class="comment"> * provided which will call this method.</span></div>
<div class="line"><a name="l00966"></a><span class="lineno"> 966</span> <span class="comment"> * @param other The object to be swapped with this one.</span></div>
<div class="line"><a name="l00967"></a><span class="lineno"> 967</span> <span class="comment"> * @note An object swapped does not, by virtue of the swap, inherit</span></div>
<div class="line"><a name="l00968"></a><span class="lineno"> 968</span> <span class="comment"> * any threads waiting on the other one. However if threads were</span></div>
<div class="line"><a name="l00969"></a><span class="lineno"> 969</span> <span class="comment"> * waiting on a swapped object prior to the swap, and it acquires</span></div>
<div class="line"><a name="l00970"></a><span class="lineno"> 970</span> <span class="comment"> * items by virtue of the swap, the waiting threads will unblock and</span></div>
<div class="line"><a name="l00971"></a><span class="lineno"> 971</span> <span class="comment"> * extract those items.</span></div>
<div class="line"><a name="l00972"></a><span class="lineno"> 972</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00973"></a><span class="lineno"> 973</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l00974"></a><span class="lineno"> 974</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00975"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a4e6a8f326faf02a401f25616e61ed64f"> 975</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a4e6a8f326faf02a401f25616e61ed64f">swap</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">AsyncQueueDispatch</a>& other) {</div>
<div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &other) {</div>
<div class="line"><a name="l00977"></a><span class="lineno"> 977</span>  lock2(mutex, other.mutex); <span class="comment">// doesn't throw</span></div>
<div class="line"><a name="l00978"></a><span class="lineno"> 978</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> l1{mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l00979"></a><span class="lineno"> 979</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> l2{other.mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l00980"></a><span class="lineno"> 980</span>  q.swap(other.q);</div>
<div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  <span class="keywordflow">if</span> (!q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a88f86501defc0d4b648c11c0e9b7b8cf">broadcast</a>();</div>
<div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  <span class="keywordflow">if</span> (!other.q.empty()) other.cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a88f86501defc0d4b648c11c0e9b7b8cf">broadcast</a>();</div>
<div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  }</div>
<div class="line"><a name="l00984"></a><span class="lineno"> 984</span>  }</div>
<div class="line"><a name="l00985"></a><span class="lineno"> 985</span> <span class="comment"></span></div>
<div class="line"><a name="l00986"></a><span class="lineno"> 986</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00987"></a><span class="lineno"> 987</span> <span class="comment"> * The copy assignment operator is strongly exception safe with the</span></div>
<div class="line"><a name="l00988"></a><span class="lineno"> 988</span> <span class="comment"> * standard sequence containers (it uses copy and swap). It is also</span></div>
<div class="line"><a name="l00989"></a><span class="lineno"> 989</span> <span class="comment"> * thread safe, as it safely locks both the assignor's and assignee's</span></div>
<div class="line"><a name="l00990"></a><span class="lineno"> 990</span> <span class="comment"> * mutex to provide a thread-wise atomic assignment.</span></div>
<div class="line"><a name="l00991"></a><span class="lineno"> 991</span> <span class="comment"> * @param rhs The assignor.</span></div>
<div class="line"><a name="l00992"></a><span class="lineno"> 992</span> <span class="comment"> * @return The AsyncQueueDispatch object after assignment.</span></div>
<div class="line"><a name="l00993"></a><span class="lineno"> 993</span> <span class="comment"> * @exception std::bad_alloc The copy constructor of the queue's</span></div>
<div class="line"><a name="l00994"></a><span class="lineno"> 994</span> <span class="comment"> * container type, and so this assignment operator, might throw</span></div>
<div class="line"><a name="l00995"></a><span class="lineno"> 995</span> <span class="comment"> * std::bad_alloc if memory is exhausted and the system throws in that</span></div>
<div class="line"><a name="l00996"></a><span class="lineno"> 996</span> <span class="comment"> * case. This assignment operator will also throw if the copy</span></div>
<div class="line"><a name="l00997"></a><span class="lineno"> 997</span> <span class="comment"> * constructor of the queue's container type throws any other</span></div>
<div class="line"><a name="l00998"></a><span class="lineno"> 998</span> <span class="comment"> * exceptions, including if any copy or move constructor or copy or</span></div>
<div class="line"><a name="l00999"></a><span class="lineno"> 999</span> <span class="comment"> * move assignment operator of a contained item throws.</span></div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span> <span class="comment"> * @exception Thread::MutexError This assignment operator might</span></div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span> <span class="comment"> * throw Thread::MutexError if initialization of a transitional</span></div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span> <span class="comment"> * object's contained mutex fails. (It is often not worth checking</span></div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span> <span class="comment"> * for this, as it means either memory is exhausted or pthread has run</span></div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span> <span class="comment"> * out of other resources to create new mutexes.)</span></div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span> <span class="comment"> * @exception Thread::CondError This assignment operator might throw</span></div>
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span> <span class="comment"> * Thread::CondError if initialisation of a transitional object's</span></div>
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span> <span class="comment"> * contained condition variable fails. (It is often not worth</span></div>
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span> <span class="comment"> * checking for this, as it means either memory is exhausted or</span></div>
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span> <span class="comment"> * pthread has run out of other resources to create new condition</span></div>
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span> <span class="comment"> * variables.)</span></div>
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span> <span class="comment"> * @note The assignee does not, by virtue of the assignment, inherit</span></div>
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span> <span class="comment"> * any threads waiting on the assignor. However, if prior to the</span></div>
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span> <span class="comment"> * assignment threads were waiting on the assignee and the assignee</span></div>
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span> <span class="comment"> * acquires items from the assignor as a result of the assignment, the</span></div>
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span> <span class="comment"> * waiting threads will unblock and extract those items.</span></div>
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01017"></a><span class="lineno"> 1017</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01019"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#aadbc0e7759e1665d9a2952e4a3a7bb51"> 1019</a></span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">AsyncQueueDispatch</a>& <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#aadbc0e7759e1665d9a2952e4a3a7bb51">operator=</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">AsyncQueueDispatch</a>& rhs) {</div>
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &rhs) {</div>
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  lock2(mutex, rhs.mutex); <span class="comment">// doesn't throw</span></div>
<div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> l1{mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> l2{rhs.mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>  std::queue<T, Container> temp{rhs.q};</div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  q.swap(temp);</div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>  <span class="keywordflow">if</span> (!q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a88f86501defc0d4b648c11c0e9b7b8cf">broadcast</a>();</div>
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  }</div>
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>  }</div>
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span> <span class="comment"></span></div>
<div class="line"><a name="l01031"></a><span class="lineno"> 1031</span> <span class="comment">/**</span></div>
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span> <span class="comment"> * This move assignment operator is thread safe as regards the</span></div>
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span> <span class="comment"> * assignee (the object moved to), but no synchronization is carried</span></div>
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span> <span class="comment"> * out with respect to the rvalue assignor/movant. This is because</span></div>
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span> <span class="comment"> * temporaries are only visible and accessible in the thread carrying</span></div>
<div class="line"><a name="l01036"></a><span class="lineno"> 1036</span> <span class="comment"> * out the move operation and synchronization for them would represent</span></div>
<div class="line"><a name="l01037"></a><span class="lineno"> 1037</span> <span class="comment"> * pointless overhead. In a case where the user uses std::move to</span></div>
<div class="line"><a name="l01038"></a><span class="lineno"> 1038</span> <span class="comment"> * force a move from a named object, and that named object's lifetime</span></div>
<div class="line"><a name="l01039"></a><span class="lineno"> 1039</span> <span class="comment"> * is managed by (or the object is otherwise accessed by) a different</span></div>
<div class="line"><a name="l01040"></a><span class="lineno"> 1040</span> <span class="comment"> * thread than the one making the move, the user must carry out her</span></div>
<div class="line"><a name="l01041"></a><span class="lineno"> 1041</span> <span class="comment"> * own synchronization with respect to that different thread, both to</span></div>
<div class="line"><a name="l01042"></a><span class="lineno"> 1042</span> <span class="comment"> * ensure that a consistent view of the the named object is obtained</span></div>
<div class="line"><a name="l01043"></a><span class="lineno"> 1043</span> <span class="comment"> * and because that object will be mutated by the move. This method</span></div>
<div class="line"><a name="l01044"></a><span class="lineno"> 1044</span> <span class="comment"> * invokes std::queue's move assignment operator, and therefore has</span></div>
<div class="line"><a name="l01045"></a><span class="lineno"> 1045</span> <span class="comment"> * the same exception safety as the standard library's implementation</span></div>
<div class="line"><a name="l01046"></a><span class="lineno"> 1046</span> <span class="comment"> * of that operator. It will not normally throw unless a custom</span></div>
<div class="line"><a name="l01047"></a><span class="lineno"> 1047</span> <span class="comment"> * allocator is used which throws on move assignment, or the</span></div>
<div class="line"><a name="l01048"></a><span class="lineno"> 1048</span> <span class="comment"> * destructor of a contained item throws.</span></div>
<div class="line"><a name="l01049"></a><span class="lineno"> 1049</span> <span class="comment"> * @param rhs The assignor/movant.</span></div>
<div class="line"><a name="l01050"></a><span class="lineno"> 1050</span> <span class="comment"> * @return The AsyncQueueDispatch object after move assignment.</span></div>
<div class="line"><a name="l01051"></a><span class="lineno"> 1051</span> <span class="comment"> * @note The assignee does not, by virtue of the move, inherit any</span></div>
<div class="line"><a name="l01052"></a><span class="lineno"> 1052</span> <span class="comment"> * threads waiting on the assignor/movant. However, if prior to the</span></div>
<div class="line"><a name="l01053"></a><span class="lineno"> 1053</span> <span class="comment"> * move threads were waiting on the assignee and the assignee acquires</span></div>
<div class="line"><a name="l01054"></a><span class="lineno"> 1054</span> <span class="comment"> * items from the assignor/movant as a result of the move, from</span></div>
<div class="line"><a name="l01055"></a><span class="lineno"> 1055</span> <span class="comment"> * version 2.0.9 the waiting threads will unblock and extract those</span></div>
<div class="line"><a name="l01056"></a><span class="lineno"> 1056</span> <span class="comment"> * items (such unblocking on move assignment did not happen with</span></div>
<div class="line"><a name="l01057"></a><span class="lineno"> 1057</span> <span class="comment"> * version 2.0.8, which was a bug).</span></div>
<div class="line"><a name="l01058"></a><span class="lineno"> 1058</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01059"></a><span class="lineno"> 1059</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l01060"></a><span class="lineno"> 1060</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01061"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a036e086cf0fe41a3dd0907b440e614cc"> 1061</a></span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">AsyncQueueDispatch</a>& <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a036e086cf0fe41a3dd0907b440e614cc">operator=</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">AsyncQueueDispatch</a>&& rhs) {</div>
<div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>  q = std::move(rhs.q);</div>
<div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>  <span class="keywordflow">if</span> (!q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a88f86501defc0d4b648c11c0e9b7b8cf">broadcast</a>();</div>
<div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>  }</div>
<div class="line"><a name="l01067"></a><span class="lineno"> 1067</span> <span class="comment"></span></div>
<div class="line"><a name="l01068"></a><span class="lineno"> 1068</span> <span class="comment">/**</span></div>
<div class="line"><a name="l01069"></a><span class="lineno"> 1069</span> <span class="comment"> * @exception std::bad_alloc The default constructor might throw this</span></div>
<div class="line"><a name="l01070"></a><span class="lineno"> 1070</span> <span class="comment"> * exception if memory is exhausted and the system throws in that</span></div>
<div class="line"><a name="l01071"></a><span class="lineno"> 1071</span> <span class="comment"> * case.</span></div>
<div class="line"><a name="l01072"></a><span class="lineno"> 1072</span> <span class="comment"> * @exception Thread::MutexError The default constructor might throw</span></div>
<div class="line"><a name="l01073"></a><span class="lineno"> 1073</span> <span class="comment"> * this exception if initialisation of the contained mutex fails. (It</span></div>
<div class="line"><a name="l01074"></a><span class="lineno"> 1074</span> <span class="comment"> * is often not worth checking for this, as it means either memory is</span></div>
<div class="line"><a name="l01075"></a><span class="lineno"> 1075</span> <span class="comment"> * exhausted or pthread has run out of other resources to create new</span></div>
<div class="line"><a name="l01076"></a><span class="lineno"> 1076</span> <span class="comment"> * mutexes.)</span></div>
<div class="line"><a name="l01077"></a><span class="lineno"> 1077</span> <span class="comment"> * @exception Thread::CondError The default constructor might throw</span></div>
<div class="line"><a name="l01078"></a><span class="lineno"> 1078</span> <span class="comment"> * this exception if initialisation of the contained condition</span></div>
<div class="line"><a name="l01079"></a><span class="lineno"> 1079</span> <span class="comment"> * variable fails. (It is often not worth checking for this, as it</span></div>
<div class="line"><a name="l01080"></a><span class="lineno"> 1080</span> <span class="comment"> * means either memory is exhausted or pthread has run out of other</span></div>
<div class="line"><a name="l01081"></a><span class="lineno"> 1081</span> <span class="comment"> * resources to create new condition variables.)</span></div>
<div class="line"><a name="l01082"></a><span class="lineno"> 1082</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l01084"></a><span class="lineno"> 1084</span> <span class="comment"></span></div>
<div class="line"><a name="l01085"></a><span class="lineno"> 1085</span> <span class="comment">/**</span></div>
<div class="line"><a name="l01086"></a><span class="lineno"> 1086</span> <span class="comment"> * As regards thread safety, the move constructor does not synchronize</span></div>
<div class="line"><a name="l01087"></a><span class="lineno"> 1087</span> <span class="comment"> * with respect to the initializing rvalue. This is because</span></div>
<div class="line"><a name="l01088"></a><span class="lineno"> 1088</span> <span class="comment"> * temporaries are only visible and accessible in the thread carrying</span></div>
<div class="line"><a name="l01089"></a><span class="lineno"> 1089</span> <span class="comment"> * out the move operation and synchronization for them would represent</span></div>
<div class="line"><a name="l01090"></a><span class="lineno"> 1090</span> <span class="comment"> * pointless overhead. In a case where a user uses std::move to force</span></div>
<div class="line"><a name="l01091"></a><span class="lineno"> 1091</span> <span class="comment"> * a move from a named object, and that named object's lifetime is</span></div>
<div class="line"><a name="l01092"></a><span class="lineno"> 1092</span> <span class="comment"> * managed by (or the object is otherwise accessed by) a different</span></div>
<div class="line"><a name="l01093"></a><span class="lineno"> 1093</span> <span class="comment"> * thread than the one making the move, the user must carry out her</span></div>
<div class="line"><a name="l01094"></a><span class="lineno"> 1094</span> <span class="comment"> * own synchronization with respect to that different thread, both to</span></div>
<div class="line"><a name="l01095"></a><span class="lineno"> 1095</span> <span class="comment"> * ensure that a consistent view of the the named object is obtained</span></div>
<div class="line"><a name="l01096"></a><span class="lineno"> 1096</span> <span class="comment"> * and because that object will be mutated by the move.</span></div>
<div class="line"><a name="l01097"></a><span class="lineno"> 1097</span> <span class="comment"> * @param rhs The AsyncQueueDispatch object to be moved.</span></div>
<div class="line"><a name="l01098"></a><span class="lineno"> 1098</span> <span class="comment"> * @exception Thread::MutexError The move constructor might throw</span></div>
<div class="line"><a name="l01099"></a><span class="lineno"> 1099</span> <span class="comment"> * Thread::MutexError if initialization of the contained mutex fails.</span></div>
<div class="line"><a name="l01100"></a><span class="lineno"> 1100</span> <span class="comment"> * If it does so this move constructor is strongly exception safe (if</span></div>
<div class="line"><a name="l01101"></a><span class="lineno"> 1101</span> <span class="comment"> * it is thrown, the object passed as an argument will be unchanged).</span></div>
<div class="line"><a name="l01102"></a><span class="lineno"> 1102</span> <span class="comment"> * (It is often not worth checking for this, as it means either memory</span></div>
<div class="line"><a name="l01103"></a><span class="lineno"> 1103</span> <span class="comment"> * is exhausted or pthread has run out of other resources to create</span></div>
<div class="line"><a name="l01104"></a><span class="lineno"> 1104</span> <span class="comment"> * new mutexes.)</span></div>
<div class="line"><a name="l01105"></a><span class="lineno"> 1105</span> <span class="comment"> * @exception Thread::CondError The move constructor might throw</span></div>
<div class="line"><a name="l01106"></a><span class="lineno"> 1106</span> <span class="comment"> * Thread::CondError exception if initialisation of the contained</span></div>
<div class="line"><a name="l01107"></a><span class="lineno"> 1107</span> <span class="comment"> * condition variable fails. If it does so this move constructor is</span></div>
<div class="line"><a name="l01108"></a><span class="lineno"> 1108</span> <span class="comment"> * strongly exception safe (if it is thrown, the object passed as an</span></div>
<div class="line"><a name="l01109"></a><span class="lineno"> 1109</span> <span class="comment"> * argument will be unchanged). (It is often not worth checking for</span></div>
<div class="line"><a name="l01110"></a><span class="lineno"> 1110</span> <span class="comment"> * this, as it means either memory is exhausted or pthread has run out</span></div>
<div class="line"><a name="l01111"></a><span class="lineno"> 1111</span> <span class="comment"> * of other resources to create new condition variables.)</span></div>
<div class="line"><a name="l01112"></a><span class="lineno"> 1112</span> <span class="comment"> * @note The move constructor might also throw if the queue's</span></div>
<div class="line"><a name="l01113"></a><span class="lineno"> 1113</span> <span class="comment"> * container type's move constructor might throw, but it should not do</span></div>
<div class="line"><a name="l01114"></a><span class="lineno"> 1114</span> <span class="comment"> * that unless a custom allocator is in use.</span></div>
<div class="line"><a name="l01115"></a><span class="lineno"> 1115</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01116"></a><span class="lineno"> 1116</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l01117"></a><span class="lineno"> 1117</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01118"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a6a2b6facb556e0f1defd4cf890fd6247"> 1118</a></span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a6a2b6facb556e0f1defd4cf890fd6247">AsyncQueueDispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">AsyncQueueDispatch</a>&& rhs): q(std::move(rhs.q)) {}</div>
<div class="line"><a name="l01119"></a><span class="lineno"> 1119</span> <span class="comment"></span></div>
<div class="line"><a name="l01120"></a><span class="lineno"> 1120</span> <span class="comment">/**</span></div>
<div class="line"><a name="l01121"></a><span class="lineno"> 1121</span> <span class="comment"> * The copy constructor is thread safe, as it locks the initializing</span></div>
<div class="line"><a name="l01122"></a><span class="lineno"> 1122</span> <span class="comment"> * object's mutex to obtain a consistent view of it.</span></div>
<div class="line"><a name="l01123"></a><span class="lineno"> 1123</span> <span class="comment"> * @param rhs The AsyncQueueDispatch object to be copied.</span></div>
<div class="line"><a name="l01124"></a><span class="lineno"> 1124</span> <span class="comment"> * @exception std::bad_alloc The copy constructor of the queue's</span></div>
<div class="line"><a name="l01125"></a><span class="lineno"> 1125</span> <span class="comment"> * container type, and so this constructor, might throw std::bad_alloc</span></div>
<div class="line"><a name="l01126"></a><span class="lineno"> 1126</span> <span class="comment"> * if memory is exhausted and the system throws in that case. It will</span></div>
<div class="line"><a name="l01127"></a><span class="lineno"> 1127</span> <span class="comment"> * also throw if the copy constructor of the queue's container type</span></div>
<div class="line"><a name="l01128"></a><span class="lineno"> 1128</span> <span class="comment"> * throws any other exceptions, including if any copy or move</span></div>
<div class="line"><a name="l01129"></a><span class="lineno"> 1129</span> <span class="comment"> * constructor or copy or move assignment operator of a contained item</span></div>
<div class="line"><a name="l01130"></a><span class="lineno"> 1130</span> <span class="comment"> * throws.</span></div>
<div class="line"><a name="l01131"></a><span class="lineno"> 1131</span> <span class="comment"> * @exception Thread::MutexError The copy constructor might throw</span></div>
<div class="line"><a name="l01132"></a><span class="lineno"> 1132</span> <span class="comment"> * Thread::MutexError if initialization of the contained mutex fails.</span></div>
<div class="line"><a name="l01133"></a><span class="lineno"> 1133</span> <span class="comment"> * (It is often not worth checking for this, as it means either memory</span></div>
<div class="line"><a name="l01134"></a><span class="lineno"> 1134</span> <span class="comment"> * is exhausted or pthread has run out of other resources to create</span></div>
<div class="line"><a name="l01135"></a><span class="lineno"> 1135</span> <span class="comment"> * new mutexes.)</span></div>
<div class="line"><a name="l01136"></a><span class="lineno"> 1136</span> <span class="comment"> * @exception Thread::CondError The copy constructor might throw this</span></div>
<div class="line"><a name="l01137"></a><span class="lineno"> 1137</span> <span class="comment"> * exception if initialisation of the contained condition variable</span></div>
<div class="line"><a name="l01138"></a><span class="lineno"> 1138</span> <span class="comment"> * fails. (It is often not worth checking for this, as it means</span></div>
<div class="line"><a name="l01139"></a><span class="lineno"> 1139</span> <span class="comment"> * either memory is exhausted or pthread has run out of other</span></div>
<div class="line"><a name="l01140"></a><span class="lineno"> 1140</span> <span class="comment"> * resources to create new condition variables.)</span></div>
<div class="line"><a name="l01141"></a><span class="lineno"> 1141</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01142"></a><span class="lineno"> 1142</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l01143"></a><span class="lineno"> 1143</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>  <span class="comment">// we use the comma operator here to lock the mutex and call the</span></div>
<div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>  <span class="comment">// copy constructor: the lock will be retained until the end of the</span></div>
<div class="line"><a name="l01146"></a><span class="lineno"> 1146</span>  <span class="comment">// full expression in which it is lexically situated, namely until</span></div>
<div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>  <span class="comment">// the end of q's constructor - see C++11 1.9/10 and 12.2/3</span></div>
<div class="line"><a name="l01148"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a2f5c08a4825942f5bd3ee41e8ad398e2"> 1148</a></span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a2f5c08a4825942f5bd3ee41e8ad398e2">AsyncQueueDispatch</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">AsyncQueueDispatch</a>& rhs):</div>
<div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>  q((Thread::Mutex::Lock(rhs.mutex), rhs.q)) {}</div>
<div class="line"><a name="l01150"></a><span class="lineno"> 1150</span> <span class="comment"></span></div>
<div class="line"><a name="l01151"></a><span class="lineno"> 1151</span> <span class="comment">/**</span></div>
<div class="line"><a name="l01152"></a><span class="lineno"> 1152</span> <span class="comment"> * The destructor does not throw unless the destructor of a contained</span></div>
<div class="line"><a name="l01153"></a><span class="lineno"> 1153</span> <span class="comment"> * item throws. It is thread safe (any thread may delete the</span></div>
<div class="line"><a name="l01154"></a><span class="lineno"> 1154</span> <span class="comment"> * AsyncQueueDispatch object). Destroying an AsyncQueueDispatch</span></div>
<div class="line"><a name="l01155"></a><span class="lineno"> 1155</span> <span class="comment"> * object on which another thread is currently blocked results in</span></div>
<div class="line"><a name="l01156"></a><span class="lineno"> 1156</span> <span class="comment"> * undefined behavior.</span></div>
<div class="line"><a name="l01157"></a><span class="lineno"> 1157</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01158"></a><span class="lineno"><a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac132835e664d50875eecd95fdf872a4a"> 1158</a></span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac132835e664d50875eecd95fdf872a4a">~AsyncQueueDispatch</a>() {</div>
<div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>  <span class="comment">// lock and unlock the mutex in the destructor so that we have an</span></div>
<div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>  <span class="comment">// acquire operation to ensure that when the std::queue object is</span></div>
<div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>  <span class="comment">// destroyed memory is synchronised, so any thread may destroy the</span></div>
<div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>  <span class="comment">// AsyncQueueDispatch object</span></div>
<div class="line"><a name="l01163"></a><span class="lineno"> 1163</span>  <a class="code" href="classCgu_1_1Thread_1_1Mutex_1_1Lock.html" title="A scoped locking class for exception safe Mutex locking. ">Thread::Mutex::Lock</a> lock{mutex};</div>
<div class="line"><a name="l01164"></a><span class="lineno"> 1164</span>  }</div>
<div class="line"><a name="l01165"></a><span class="lineno"> 1165</span> </div>
<div class="line"><a name="l01166"></a><span class="lineno"> 1166</span> <span class="comment">/* Only has effect if --with-glib-memory-slices-compat or</span></div>
<div class="line"><a name="l01167"></a><span class="lineno"> 1167</span> <span class="comment"> * --with-glib-memory-slices-no-compat option picked */</span></div>
<div class="line"><a name="l01168"></a><span class="lineno"> 1168</span>  <a class="code" href="cgu__config_8h.html#a13241741f6a47356f61508faea37c35a">CGU_GLIB_MEMORY_SLICES_FUNCS</a></div>
<div class="line"><a name="l01169"></a><span class="lineno"> 1169</span> };</div>
<div class="line"><a name="l01170"></a><span class="lineno"> 1170</span> <span class="comment"></span></div>
<div class="line"><a name="l01171"></a><span class="lineno"> 1171</span> <span class="comment">/**</span></div>
<div class="line"><a name="l01172"></a><span class="lineno"> 1172</span> <span class="comment"> * Swaps the contents of two AsyncQueue objects. It will not throw</span></div>
<div class="line"><a name="l01173"></a><span class="lineno"> 1173</span> <span class="comment"> * assuming that the swap method of the container type does not throw</span></div>
<div class="line"><a name="l01174"></a><span class="lineno"> 1174</span> <span class="comment"> * (which the C++11 standard requires not to happen with the standard</span></div>
<div class="line"><a name="l01175"></a><span class="lineno"> 1175</span> <span class="comment"> * sequence containers). It is thread safe and the swap is</span></div>
<div class="line"><a name="l01176"></a><span class="lineno"> 1176</span> <span class="comment"> * thread-wise atomic.</span></div>
<div class="line"><a name="l01177"></a><span class="lineno"> 1177</span> <span class="comment"> * @param q1 An object to be swapped with the other.</span></div>
<div class="line"><a name="l01178"></a><span class="lineno"> 1178</span> <span class="comment"> * @param q2 An object to be swapped with the other.</span></div>
<div class="line"><a name="l01179"></a><span class="lineno"> 1179</span> <span class="comment"> * @note Calling std::swap on AsyncQueue objects is thread safe but</span></div>
<div class="line"><a name="l01180"></a><span class="lineno"> 1180</span> <span class="comment"> * does not provide a thread-wise atomic swap (the swapped objects may</span></div>
<div class="line"><a name="l01181"></a><span class="lineno"> 1181</span> <span class="comment"> * not be mirror images if during the execution of std::swap's default</span></div>
<div class="line"><a name="l01182"></a><span class="lineno"> 1182</span> <span class="comment"> * algorithm one of them has been modified), although in many cases</span></div>
<div class="line"><a name="l01183"></a><span class="lineno"> 1183</span> <span class="comment"> * that doesn't matter. If swap() is called without a namespace</span></div>
<div class="line"><a name="l01184"></a><span class="lineno"> 1184</span> <span class="comment"> * qualifier, argument dependent look-up will pick this one correctly.</span></div>
<div class="line"><a name="l01185"></a><span class="lineno"> 1185</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01186"></a><span class="lineno"> 1186</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l01187"></a><span class="lineno"> 1187</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01188"></a><span class="lineno"> 1188</span> <span class="keyword">template</span> <<span class="keyword">class</span> T, <span class="keyword">class</span> Container></div>
<div class="line"><a name="l01189"></a><span class="lineno"><a class="code" href="namespaceCgu.html#af7fd3a7ee74c9924a1449a3acad2f821"> 1189</a></span> <span class="keywordtype">void</span> <a class="code" href="namespaceCgu.html#af7fd3a7ee74c9924a1449a3acad2f821">swap</a>(<a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">Cgu::AsyncQueue<T, Container></a>& q1,</div>
<div class="line"><a name="l01190"></a><span class="lineno"> 1190</span>  <a class="code" href="classCgu_1_1AsyncQueue.html" title="A thread-safe asynchronous queue. ">Cgu::AsyncQueue<T, Container></a>& q2) {</div>
<div class="line"><a name="l01191"></a><span class="lineno"> 1191</span>  q1.<a class="code" href="classCgu_1_1AsyncQueue.html#a169609b9c64f109d8ee938b7e9e6f411">swap</a>(q2);</div>
<div class="line"><a name="l01192"></a><span class="lineno"> 1192</span> }</div>
<div class="line"><a name="l01193"></a><span class="lineno"> 1193</span> <span class="comment"></span></div>
<div class="line"><a name="l01194"></a><span class="lineno"> 1194</span> <span class="comment">/**</span></div>
<div class="line"><a name="l01195"></a><span class="lineno"> 1195</span> <span class="comment"> * Swaps the contents of two AsyncQueueDispatch objects. It will not</span></div>
<div class="line"><a name="l01196"></a><span class="lineno"> 1196</span> <span class="comment"> * throw assuming that the swap method of the container type does not</span></div>
<div class="line"><a name="l01197"></a><span class="lineno"> 1197</span> <span class="comment"> * throw (which the C++11 standard requires not to happen with the</span></div>
<div class="line"><a name="l01198"></a><span class="lineno"> 1198</span> <span class="comment"> * standard sequence containers). It is thread safe and the swap is</span></div>
<div class="line"><a name="l01199"></a><span class="lineno"> 1199</span> <span class="comment"> * thread-wise atomic.</span></div>
<div class="line"><a name="l01200"></a><span class="lineno"> 1200</span> <span class="comment"> * @param q1 An object to be swapped with the other.</span></div>
<div class="line"><a name="l01201"></a><span class="lineno"> 1201</span> <span class="comment"> * @param q2 An object to be swapped with the other.</span></div>
<div class="line"><a name="l01202"></a><span class="lineno"> 1202</span> <span class="comment"> * @note 1. An object swapped does not, by virtue of the swap, inherit</span></div>
<div class="line"><a name="l01203"></a><span class="lineno"> 1203</span> <span class="comment"> * any threads waiting on the other one. However if threads were</span></div>
<div class="line"><a name="l01204"></a><span class="lineno"> 1204</span> <span class="comment"> * waiting on a swapped object prior to the swap, and it acquires</span></div>
<div class="line"><a name="l01205"></a><span class="lineno"> 1205</span> <span class="comment"> * items by virtue of the swap, the waiting threads will unblock and</span></div>
<div class="line"><a name="l01206"></a><span class="lineno"> 1206</span> <span class="comment"> * extract those items.</span></div>
<div class="line"><a name="l01207"></a><span class="lineno"> 1207</span> <span class="comment"> * @note 2. Calling std::swap on AsyncQueueDispatch objects is thread</span></div>
<div class="line"><a name="l01208"></a><span class="lineno"> 1208</span> <span class="comment"> * safe but does not provide a thread-wise atomic swap (the swapped</span></div>
<div class="line"><a name="l01209"></a><span class="lineno"> 1209</span> <span class="comment"> * objects may not be mirror images if during the execution of</span></div>
<div class="line"><a name="l01210"></a><span class="lineno"> 1210</span> <span class="comment"> * std::swap's default algorithm one of them has been modified),</span></div>
<div class="line"><a name="l01211"></a><span class="lineno"> 1211</span> <span class="comment"> * although in many cases that doesn't matter. If swap() is called</span></div>
<div class="line"><a name="l01212"></a><span class="lineno"> 1212</span> <span class="comment"> * without a namespace qualifier, argument dependent look-up will pick</span></div>
<div class="line"><a name="l01213"></a><span class="lineno"> 1213</span> <span class="comment"> * this one correctly.</span></div>
<div class="line"><a name="l01214"></a><span class="lineno"> 1214</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01215"></a><span class="lineno"> 1215</span> <span class="comment"> * Since 2.0.8</span></div>
<div class="line"><a name="l01216"></a><span class="lineno"> 1216</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01217"></a><span class="lineno"> 1217</span> <span class="keyword">template</span> <<span class="keyword">class</span> T, <span class="keyword">class</span> Container></div>
<div class="line"><a name="l01218"></a><span class="lineno"><a class="code" href="namespaceCgu.html#a9136618990939a752891e16c8ff55a2e"> 1218</a></span> <span class="keywordtype">void</span> <a class="code" href="namespaceCgu.html#af7fd3a7ee74c9924a1449a3acad2f821">swap</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">Cgu::AsyncQueueDispatch<T, Container></a>& q1,</div>
<div class="line"><a name="l01219"></a><span class="lineno"> 1219</span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html" title="A thread-safe asynchronous queue with a blocking pop() method. ">Cgu::AsyncQueueDispatch<T, Container></a>& q2) {</div>
<div class="line"><a name="l01220"></a><span class="lineno"> 1220</span>  q1.<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a4e6a8f326faf02a401f25616e61ed64f">swap</a>(q2);</div>
<div class="line"><a name="l01221"></a><span class="lineno"> 1221</span> }</div>
<div class="line"><a name="l01222"></a><span class="lineno"> 1222</span> </div>
<div class="line"><a name="l01223"></a><span class="lineno"> 1223</span> <span class="preprocessor">#if defined(CGU_USE_INHERITABLE_QUEUE) && !defined(DOXYGEN_PARSING)</span></div>
<div class="line"><a name="l01224"></a><span class="lineno"> 1224</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01225"></a><span class="lineno"> 1225</span> <span class="comment">/* This is a specialization of AsyncQueue for std::list objects, which</span></div>
<div class="line"><a name="l01226"></a><span class="lineno"> 1226</span> <span class="comment"> uses std::list::splice() to push or emplace a new item on the</span></div>
<div class="line"><a name="l01227"></a><span class="lineno"> 1227</span> <span class="comment"> queue. This means that allocation for the push or emplacement</span></div>
<div class="line"><a name="l01228"></a><span class="lineno"> 1228</span> <span class="comment"> occurs outside the mutex, so reducing contention (a tip from a talk</span></div>
<div class="line"><a name="l01229"></a><span class="lineno"> 1229</span> <span class="comment"> by Sean Parent of Adobe). This is first available in version</span></div>
<div class="line"><a name="l01230"></a><span class="lineno"> 1230</span> <span class="comment"> 2.0.20/2.2.3.</span></div>
<div class="line"><a name="l01231"></a><span class="lineno"> 1231</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01232"></a><span class="lineno"> 1232</span> <span class="keyword">template</span> <<span class="keyword">class</span> T, <span class="keyword">class</span> Allocator></div>
<div class="line"><a name="l01233"></a><span class="lineno"> 1233</span> <span class="keyword">class </span>AsyncQueue<T, std::list<T, Allocator> > {</div>
<div class="line"><a name="l01234"></a><span class="lineno"> 1234</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l01235"></a><span class="lineno"> 1235</span>  <span class="keyword">typedef</span> std::list<T, Allocator> Container;</div>
<div class="line"><a name="l01236"></a><span class="lineno"> 1236</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> Container::value_type <a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>;</div>
<div class="line"><a name="l01237"></a><span class="lineno"> 1237</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> Container::size_type <a class="code" href="classCgu_1_1AsyncQueue.html#a110f7920e3c27e198c7d1321ce414218">size_type</a>;</div>
<div class="line"><a name="l01238"></a><span class="lineno"> 1238</span>  <span class="keyword">typedef</span> Container <a class="code" href="classCgu_1_1AsyncQueue.html#abdde7f38278958e3b7a8fe9ff6cdb4af">container_type</a>;</div>
<div class="line"><a name="l01239"></a><span class="lineno"> 1239</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l01240"></a><span class="lineno"> 1240</span>  <span class="keyword">mutable</span> Thread::Mutex mutex;</div>
<div class="line"><a name="l01241"></a><span class="lineno"> 1241</span>  <span class="comment">// 23.6.3.1 of C++11 requires std::queue to have a protected</span></div>
<div class="line"><a name="l01242"></a><span class="lineno"> 1242</span>  <span class="comment">// container member called 'c' for the purposes of derivation. This</span></div>
<div class="line"><a name="l01243"></a><span class="lineno"> 1243</span>  <span class="comment">// specialisation will have the same binary layout as the</span></div>
<div class="line"><a name="l01244"></a><span class="lineno"> 1244</span>  <span class="comment">// unspecialized version on any practical implementation: all we do</span></div>
<div class="line"><a name="l01245"></a><span class="lineno"> 1245</span>  <span class="comment">// is add a splice_end() member</span></div>
<div class="line"><a name="l01246"></a><span class="lineno"> 1246</span>  <span class="keyword">class </span>Q: <span class="keyword">public</span> std::queue<T, Container> {</div>
<div class="line"><a name="l01247"></a><span class="lineno"> 1247</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l01248"></a><span class="lineno"> 1248</span>  <span class="keywordtype">void</span> splice_end(Container&& lst) {</div>
<div class="line"><a name="l01249"></a><span class="lineno"> 1249</span>  this->c.splice(this->c.end(), std::move(lst));</div>
<div class="line"><a name="l01250"></a><span class="lineno"> 1250</span>  }</div>
<div class="line"><a name="l01251"></a><span class="lineno"> 1251</span>  } q;</div>
<div class="line"><a name="l01252"></a><span class="lineno"> 1252</span> </div>
<div class="line"><a name="l01253"></a><span class="lineno"> 1253</span>  <span class="keywordtype">void</span> lock2(Thread::Mutex& m1, Thread::Mutex& m2) {</div>
<div class="line"><a name="l01254"></a><span class="lineno"> 1254</span>  m1.lock();</div>
<div class="line"><a name="l01255"></a><span class="lineno"> 1255</span>  <span class="keywordflow">for</span>(;;) {</div>
<div class="line"><a name="l01256"></a><span class="lineno"> 1256</span>  <span class="keywordflow">if</span> (!m2.trylock()) {</div>
<div class="line"><a name="l01257"></a><span class="lineno"> 1257</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l01258"></a><span class="lineno"> 1258</span>  }</div>
<div class="line"><a name="l01259"></a><span class="lineno"> 1259</span>  m1.unlock();</div>
<div class="line"><a name="l01260"></a><span class="lineno"> 1260</span>  <span class="comment">// spin nicely</span></div>
<div class="line"><a name="l01261"></a><span class="lineno"> 1261</span> <span class="preprocessor">#ifdef CGU_USE_SCHED_YIELD</span></div>
<div class="line"><a name="l01262"></a><span class="lineno"> 1262</span> <span class="preprocessor"></span> sched_yield();</div>
<div class="line"><a name="l01263"></a><span class="lineno"> 1263</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l01264"></a><span class="lineno"> 1264</span> <span class="preprocessor"></span> usleep(10);</div>
<div class="line"><a name="l01265"></a><span class="lineno"> 1265</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l01266"></a><span class="lineno"> 1266</span> <span class="preprocessor"></span> m1.lock();</div>
<div class="line"><a name="l01267"></a><span class="lineno"> 1267</span>  }</div>
<div class="line"><a name="l01268"></a><span class="lineno"> 1268</span>  }</div>
<div class="line"><a name="l01269"></a><span class="lineno"> 1269</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l01270"></a><span class="lineno"> 1270</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#ac65a23dc377d9f4e8c6d85756176ebe9">push</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>& obj) {</div>
<div class="line"><a name="l01271"></a><span class="lineno"> 1271</span>  Container temp{obj};</div>
<div class="line"><a name="l01272"></a><span class="lineno"> 1272</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01273"></a><span class="lineno"> 1273</span>  <span class="comment">// splice_end doesn't throw</span></div>
<div class="line"><a name="l01274"></a><span class="lineno"> 1274</span>  q.splice_end(std::move(temp));</div>
<div class="line"><a name="l01275"></a><span class="lineno"> 1275</span>  }</div>
<div class="line"><a name="l01276"></a><span class="lineno"> 1276</span> </div>
<div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#ac65a23dc377d9f4e8c6d85756176ebe9">push</a>(<a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>&& obj) {</div>
<div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>  Container temp{std::move(obj)};</div>
<div class="line"><a name="l01279"></a><span class="lineno"> 1279</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01280"></a><span class="lineno"> 1280</span>  <span class="comment">// splice_end doesn't throw</span></div>
<div class="line"><a name="l01281"></a><span class="lineno"> 1281</span>  q.splice_end(std::move(temp));</div>
<div class="line"><a name="l01282"></a><span class="lineno"> 1282</span>  }</div>
<div class="line"><a name="l01283"></a><span class="lineno"> 1283</span> </div>
<div class="line"><a name="l01284"></a><span class="lineno"> 1284</span>  <span class="keyword">template</span><<span class="keyword">class</span>... Args></div>
<div class="line"><a name="l01285"></a><span class="lineno"> 1285</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#ab9da8e8ca782d41a893007cb8da2bf6e">emplace</a>(Args&&... args) {</div>
<div class="line"><a name="l01286"></a><span class="lineno"> 1286</span>  Container temp;</div>
<div class="line"><a name="l01287"></a><span class="lineno"> 1287</span>  temp.emplace_back(std::forward<Args>(args)...);</div>
<div class="line"><a name="l01288"></a><span class="lineno"> 1288</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>  <span class="comment">// splice_end doesn't throw</span></div>
<div class="line"><a name="l01290"></a><span class="lineno"> 1290</span>  q.splice_end(std::move(temp));</div>
<div class="line"><a name="l01291"></a><span class="lineno"> 1291</span>  }</div>
<div class="line"><a name="l01292"></a><span class="lineno"> 1292</span> </div>
<div class="line"><a name="l01293"></a><span class="lineno"> 1293</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a8fdc1946551aac4d110d308f297f3222">pop</a>(<a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>& obj) {</div>
<div class="line"><a name="l01294"></a><span class="lineno"> 1294</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01295"></a><span class="lineno"> 1295</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> AsyncQueuePopError();</div>
<div class="line"><a name="l01296"></a><span class="lineno"> 1296</span>  obj = q.front();</div>
<div class="line"><a name="l01297"></a><span class="lineno"> 1297</span>  q.pop();</div>
<div class="line"><a name="l01298"></a><span class="lineno"> 1298</span>  }</div>
<div class="line"><a name="l01299"></a><span class="lineno"> 1299</span> </div>
<div class="line"><a name="l01300"></a><span class="lineno"> 1300</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a7f65ae3492f70acb0db8b149192b0188">move_pop</a>(<a class="code" href="classCgu_1_1AsyncQueue.html#a16d89868393b3b58840226b0b3972560">value_type</a>& obj) {</div>
<div class="line"><a name="l01301"></a><span class="lineno"> 1301</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> AsyncQueuePopError();</div>
<div class="line"><a name="l01303"></a><span class="lineno"> 1303</span>  obj = std::move(q.front());</div>
<div class="line"><a name="l01304"></a><span class="lineno"> 1304</span>  q.pop();</div>
<div class="line"><a name="l01305"></a><span class="lineno"> 1305</span>  }</div>
<div class="line"><a name="l01306"></a><span class="lineno"> 1306</span> </div>
<div class="line"><a name="l01307"></a><span class="lineno"> 1307</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a8fdc1946551aac4d110d308f297f3222">pop</a>() {</div>
<div class="line"><a name="l01308"></a><span class="lineno"> 1308</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01309"></a><span class="lineno"> 1309</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> AsyncQueuePopError();</div>
<div class="line"><a name="l01310"></a><span class="lineno"> 1310</span>  q.pop();</div>
<div class="line"><a name="l01311"></a><span class="lineno"> 1311</span>  }</div>
<div class="line"><a name="l01312"></a><span class="lineno"> 1312</span> </div>
<div class="line"><a name="l01313"></a><span class="lineno"> 1313</span>  <span class="keywordtype">bool</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a453326732dd6b6ec9c18e2397d26c6cd">empty</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l01314"></a><span class="lineno"> 1314</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>  <span class="keywordflow">return</span> q.empty();</div>
<div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>  }</div>
<div class="line"><a name="l01317"></a><span class="lineno"> 1317</span> </div>
<div class="line"><a name="l01318"></a><span class="lineno"> 1318</span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a110f7920e3c27e198c7d1321ce414218">size_type</a> <a class="code" href="classCgu_1_1AsyncQueue.html#a443d62e1475c3e0d8aa0b49cb6e6a514">size</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l01319"></a><span class="lineno"> 1319</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>  <span class="keywordflow">return</span> q.size();</div>
<div class="line"><a name="l01321"></a><span class="lineno"> 1321</span>  }</div>
<div class="line"><a name="l01322"></a><span class="lineno"> 1322</span> </div>
<div class="line"><a name="l01323"></a><span class="lineno"> 1323</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a169609b9c64f109d8ee938b7e9e6f411">swap</a>(<a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>& other) {</div>
<div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &other) {</div>
<div class="line"><a name="l01325"></a><span class="lineno"> 1325</span>  lock2(mutex, other.mutex); <span class="comment">// doesn't throw</span></div>
<div class="line"><a name="l01326"></a><span class="lineno"> 1326</span>  Thread::Mutex::Lock l1{mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01327"></a><span class="lineno"> 1327</span>  Thread::Mutex::Lock l2{other.mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01328"></a><span class="lineno"> 1328</span>  q.swap(other.q);</div>
<div class="line"><a name="l01329"></a><span class="lineno"> 1329</span>  }</div>
<div class="line"><a name="l01330"></a><span class="lineno"> 1330</span>  }</div>
<div class="line"><a name="l01331"></a><span class="lineno"> 1331</span> </div>
<div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>& <a class="code" href="classCgu_1_1AsyncQueue.html#a4f605e4ae66382f4450f5886b9f84d3c">operator=</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>& rhs) {</div>
<div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &rhs) {</div>
<div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>  lock2(mutex, rhs.mutex); <span class="comment">// doesn't throw</span></div>
<div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>  Thread::Mutex::Lock l1{mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01336"></a><span class="lineno"> 1336</span>  Thread::Mutex::Lock l2{rhs.mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01337"></a><span class="lineno"> 1337</span>  Q temp{rhs.q};</div>
<div class="line"><a name="l01338"></a><span class="lineno"> 1338</span>  q.swap(temp);</div>
<div class="line"><a name="l01339"></a><span class="lineno"> 1339</span>  }</div>
<div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>  }</div>
<div class="line"><a name="l01342"></a><span class="lineno"> 1342</span> </div>
<div class="line"><a name="l01343"></a><span class="lineno"> 1343</span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>& <a class="code" href="classCgu_1_1AsyncQueue.html#a4f605e4ae66382f4450f5886b9f84d3c">operator=</a>(<a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>&& rhs) {</div>
<div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01345"></a><span class="lineno"> 1345</span>  q = std::move(rhs.q);</div>
<div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l01347"></a><span class="lineno"> 1347</span>  }</div>
<div class="line"><a name="l01348"></a><span class="lineno"> 1348</span> </div>
<div class="line"><a name="l01349"></a><span class="lineno"> 1349</span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l01350"></a><span class="lineno"> 1350</span> </div>
<div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>(<a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>&& rhs): q(std::move(rhs.q)) {}</div>
<div class="line"><a name="l01352"></a><span class="lineno"> 1352</span> </div>
<div class="line"><a name="l01353"></a><span class="lineno"> 1353</span>  <a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueue.html#a931e7f93da61b9424c6a44c50d74a0dc">AsyncQueue</a>& rhs): q((Thread::Mutex::Lock(rhs.mutex), rhs.q)) {}</div>
<div class="line"><a name="l01354"></a><span class="lineno"> 1354</span> </div>
<div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>  <a class="code" href="classCgu_1_1AsyncQueue.html#af90786907824e0e2471e9d120467a8a6">~AsyncQueue</a>() {</div>
<div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01357"></a><span class="lineno"> 1357</span>  }</div>
<div class="line"><a name="l01358"></a><span class="lineno"> 1358</span> </div>
<div class="line"><a name="l01359"></a><span class="lineno"> 1359</span>  <a class="code" href="cgu__config_8h.html#a13241741f6a47356f61508faea37c35a">CGU_GLIB_MEMORY_SLICES_FUNCS</a></div>
<div class="line"><a name="l01360"></a><span class="lineno"> 1360</span> };</div>
<div class="line"><a name="l01361"></a><span class="lineno"> 1361</span> </div>
<div class="line"><a name="l01362"></a><span class="lineno"> 1362</span> <span class="comment">/* This is a specialization of AsyncQueueDispatch for std::list</span></div>
<div class="line"><a name="l01363"></a><span class="lineno"> 1363</span> <span class="comment"> objects, which uses std::list::splice() to push or emplace a new</span></div>
<div class="line"><a name="l01364"></a><span class="lineno"> 1364</span> <span class="comment"> item on the queue. This means that allocation for the push or</span></div>
<div class="line"><a name="l01365"></a><span class="lineno"> 1365</span> <span class="comment"> emplacement occurs outside the mutex, so reducing contention (a tip</span></div>
<div class="line"><a name="l01366"></a><span class="lineno"> 1366</span> <span class="comment"> from a talk by Sean Parent of Adobe). This is first available in</span></div>
<div class="line"><a name="l01367"></a><span class="lineno"> 1367</span> <span class="comment"> version 2.0.20/2.2.3.</span></div>
<div class="line"><a name="l01368"></a><span class="lineno"> 1368</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01369"></a><span class="lineno"> 1369</span> <span class="keyword">template</span> <<span class="keyword">class</span> T, <span class="keyword">class</span> Allocator></div>
<div class="line"><a name="l01370"></a><span class="lineno"> 1370</span> <span class="keyword">class </span>AsyncQueueDispatch<T, std::list<T, Allocator> > {</div>
<div class="line"><a name="l01371"></a><span class="lineno"> 1371</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>  <span class="keyword">typedef</span> std::list<T, Allocator> Container;</div>
<div class="line"><a name="l01373"></a><span class="lineno"> 1373</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> Container::value_type <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>;</div>
<div class="line"><a name="l01374"></a><span class="lineno"> 1374</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> Container::size_type <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a1a62475616b3a704633ba35964d73caa">size_type</a>;</div>
<div class="line"><a name="l01375"></a><span class="lineno"> 1375</span>  <span class="keyword">typedef</span> Container <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#aaec3264a39f49e88f2522d1d5f616331">container_type</a>;</div>
<div class="line"><a name="l01376"></a><span class="lineno"> 1376</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l01377"></a><span class="lineno"> 1377</span>  <span class="keyword">mutable</span> Thread::Mutex mutex;</div>
<div class="line"><a name="l01378"></a><span class="lineno"> 1378</span>  Thread::Cond cond;</div>
<div class="line"><a name="l01379"></a><span class="lineno"> 1379</span>  <span class="comment">// 23.6.3.1 of C++11 requires std::queue to have a protected</span></div>
<div class="line"><a name="l01380"></a><span class="lineno"> 1380</span>  <span class="comment">// container member called 'c' for the purposes of derivation. This</span></div>
<div class="line"><a name="l01381"></a><span class="lineno"> 1381</span>  <span class="comment">// specialisation will have the same binary layout as the</span></div>
<div class="line"><a name="l01382"></a><span class="lineno"> 1382</span>  <span class="comment">// unspecialized version on any practical implementation: all we do</span></div>
<div class="line"><a name="l01383"></a><span class="lineno"> 1383</span>  <span class="comment">// is add a splice_end() member</span></div>
<div class="line"><a name="l01384"></a><span class="lineno"> 1384</span>  <span class="keyword">class </span>Q: <span class="keyword">public</span> std::queue<T, Container> {</div>
<div class="line"><a name="l01385"></a><span class="lineno"> 1385</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l01386"></a><span class="lineno"> 1386</span>  <span class="keywordtype">void</span> splice_end(Container&& lst) {</div>
<div class="line"><a name="l01387"></a><span class="lineno"> 1387</span>  this->c.splice(this->c.end(), std::move(lst));</div>
<div class="line"><a name="l01388"></a><span class="lineno"> 1388</span>  }</div>
<div class="line"><a name="l01389"></a><span class="lineno"> 1389</span>  } q;</div>
<div class="line"><a name="l01390"></a><span class="lineno"> 1390</span> </div>
<div class="line"><a name="l01391"></a><span class="lineno"> 1391</span>  <span class="keywordtype">void</span> lock2(Thread::Mutex& m1, Thread::Mutex& m2) {</div>
<div class="line"><a name="l01392"></a><span class="lineno"> 1392</span>  m1.lock();</div>
<div class="line"><a name="l01393"></a><span class="lineno"> 1393</span>  <span class="keywordflow">for</span>(;;) {</div>
<div class="line"><a name="l01394"></a><span class="lineno"> 1394</span>  <span class="keywordflow">if</span> (!m2.trylock()) {</div>
<div class="line"><a name="l01395"></a><span class="lineno"> 1395</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l01396"></a><span class="lineno"> 1396</span>  }</div>
<div class="line"><a name="l01397"></a><span class="lineno"> 1397</span>  m1.unlock();</div>
<div class="line"><a name="l01398"></a><span class="lineno"> 1398</span>  <span class="comment">// spin nicely</span></div>
<div class="line"><a name="l01399"></a><span class="lineno"> 1399</span> <span class="preprocessor">#ifdef CGU_USE_SCHED_YIELD</span></div>
<div class="line"><a name="l01400"></a><span class="lineno"> 1400</span> <span class="preprocessor"></span> sched_yield();</div>
<div class="line"><a name="l01401"></a><span class="lineno"> 1401</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l01402"></a><span class="lineno"> 1402</span> <span class="preprocessor"></span> usleep(10);</div>
<div class="line"><a name="l01403"></a><span class="lineno"> 1403</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l01404"></a><span class="lineno"> 1404</span> <span class="preprocessor"></span> m1.lock();</div>
<div class="line"><a name="l01405"></a><span class="lineno"> 1405</span>  }</div>
<div class="line"><a name="l01406"></a><span class="lineno"> 1406</span>  }</div>
<div class="line"><a name="l01407"></a><span class="lineno"> 1407</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l01408"></a><span class="lineno"> 1408</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac087f3cb959c7ebdb930b7df5afc5483">push</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l01409"></a><span class="lineno"> 1409</span>  Container temp{obj};</div>
<div class="line"><a name="l01410"></a><span class="lineno"> 1410</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01411"></a><span class="lineno"> 1411</span>  <span class="comment">// splice_end doesn't throw</span></div>
<div class="line"><a name="l01412"></a><span class="lineno"> 1412</span>  q.splice_end(std::move(temp));</div>
<div class="line"><a name="l01413"></a><span class="lineno"> 1413</span>  cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#ae538fe7d9f19a57aeb1affff36bc9b8d">signal</a>();</div>
<div class="line"><a name="l01414"></a><span class="lineno"> 1414</span>  }</div>
<div class="line"><a name="l01415"></a><span class="lineno"> 1415</span> </div>
<div class="line"><a name="l01416"></a><span class="lineno"> 1416</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac087f3cb959c7ebdb930b7df5afc5483">push</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>&& obj) {</div>
<div class="line"><a name="l01417"></a><span class="lineno"> 1417</span>  Container temp{std::move(obj)};</div>
<div class="line"><a name="l01418"></a><span class="lineno"> 1418</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01419"></a><span class="lineno"> 1419</span>  <span class="comment">// splice_end doesn't throw</span></div>
<div class="line"><a name="l01420"></a><span class="lineno"> 1420</span>  q.splice_end(std::move(temp));</div>
<div class="line"><a name="l01421"></a><span class="lineno"> 1421</span>  cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#ae538fe7d9f19a57aeb1affff36bc9b8d">signal</a>();</div>
<div class="line"><a name="l01422"></a><span class="lineno"> 1422</span>  }</div>
<div class="line"><a name="l01423"></a><span class="lineno"> 1423</span> </div>
<div class="line"><a name="l01424"></a><span class="lineno"> 1424</span>  <span class="keyword">template</span><<span class="keyword">class</span>... Args></div>
<div class="line"><a name="l01425"></a><span class="lineno"> 1425</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ae15b0851aecbf2330662bd6d57994895">emplace</a>(Args&&... args) {</div>
<div class="line"><a name="l01426"></a><span class="lineno"> 1426</span>  Container temp;</div>
<div class="line"><a name="l01427"></a><span class="lineno"> 1427</span>  temp.emplace_back(std::forward<Args>(args)...);</div>
<div class="line"><a name="l01428"></a><span class="lineno"> 1428</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01429"></a><span class="lineno"> 1429</span>  <span class="comment">// splice_end doesn't throw</span></div>
<div class="line"><a name="l01430"></a><span class="lineno"> 1430</span>  q.splice_end(std::move(temp));</div>
<div class="line"><a name="l01431"></a><span class="lineno"> 1431</span>  cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#ae538fe7d9f19a57aeb1affff36bc9b8d">signal</a>();</div>
<div class="line"><a name="l01432"></a><span class="lineno"> 1432</span>  }</div>
<div class="line"><a name="l01433"></a><span class="lineno"> 1433</span> </div>
<div class="line"><a name="l01434"></a><span class="lineno"> 1434</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a70d32d20e0dc0d431b277de3e9478540">pop</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l01435"></a><span class="lineno"> 1435</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01436"></a><span class="lineno"> 1436</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> AsyncQueuePopError();</div>
<div class="line"><a name="l01437"></a><span class="lineno"> 1437</span>  obj = q.front();</div>
<div class="line"><a name="l01438"></a><span class="lineno"> 1438</span>  q.pop();</div>
<div class="line"><a name="l01439"></a><span class="lineno"> 1439</span>  }</div>
<div class="line"><a name="l01440"></a><span class="lineno"> 1440</span> </div>
<div class="line"><a name="l01441"></a><span class="lineno"> 1441</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a07a4d13f035e371299a3404a1a00ac8a">move_pop</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l01442"></a><span class="lineno"> 1442</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01443"></a><span class="lineno"> 1443</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> AsyncQueuePopError();</div>
<div class="line"><a name="l01444"></a><span class="lineno"> 1444</span>  obj = std::move(q.front());</div>
<div class="line"><a name="l01445"></a><span class="lineno"> 1445</span>  q.pop();</div>
<div class="line"><a name="l01446"></a><span class="lineno"> 1446</span>  }</div>
<div class="line"><a name="l01447"></a><span class="lineno"> 1447</span> </div>
<div class="line"><a name="l01448"></a><span class="lineno"> 1448</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a2ab1ff7c9ccd5b37feabae6b45385512">pop_dispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l01449"></a><span class="lineno"> 1449</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01450"></a><span class="lineno"> 1450</span>  <span class="keywordflow">while</span> (q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a5eda52c227552555102bb45010a8f6c9">wait</a>(mutex);</div>
<div class="line"><a name="l01451"></a><span class="lineno"> 1451</span>  Thread::CancelBlock b;</div>
<div class="line"><a name="l01452"></a><span class="lineno"> 1452</span>  obj = q.front();</div>
<div class="line"><a name="l01453"></a><span class="lineno"> 1453</span>  q.pop();</div>
<div class="line"><a name="l01454"></a><span class="lineno"> 1454</span>  } </div>
<div class="line"><a name="l01455"></a><span class="lineno"> 1455</span> </div>
<div class="line"><a name="l01456"></a><span class="lineno"> 1456</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a3527f334c16d5ee180045ab7aa2f5867">move_pop_dispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj) {</div>
<div class="line"><a name="l01457"></a><span class="lineno"> 1457</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01458"></a><span class="lineno"> 1458</span>  <span class="keywordflow">while</span> (q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a5eda52c227552555102bb45010a8f6c9">wait</a>(mutex);</div>
<div class="line"><a name="l01459"></a><span class="lineno"> 1459</span>  Thread::CancelBlock b;</div>
<div class="line"><a name="l01460"></a><span class="lineno"> 1460</span>  obj = std::move(q.front());</div>
<div class="line"><a name="l01461"></a><span class="lineno"> 1461</span>  q.pop();</div>
<div class="line"><a name="l01462"></a><span class="lineno"> 1462</span>  } </div>
<div class="line"><a name="l01463"></a><span class="lineno"> 1463</span> </div>
<div class="line"><a name="l01464"></a><span class="lineno"> 1464</span>  <span class="keywordtype">bool</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a9053b2a8505c61793c3cd932142d70b9">pop_timed_dispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> millisec) {</div>
<div class="line"><a name="l01465"></a><span class="lineno"> 1465</span>  timespec ts;</div>
<div class="line"><a name="l01466"></a><span class="lineno"> 1466</span>  <a class="code" href="classCgu_1_1Thread_1_1Cond.html#a47b4f8f92444dd9b806002fa4c64a5c7">Thread::Cond::get_abs_time</a>(ts, millisec);</div>
<div class="line"><a name="l01467"></a><span class="lineno"> 1467</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01468"></a><span class="lineno"> 1468</span>  <span class="keywordflow">while</span> (q.empty()) {</div>
<div class="line"><a name="l01469"></a><span class="lineno"> 1469</span>  <span class="keywordflow">if</span> (cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a5fb1c146498f23163d76e830b133df71">timed_wait</a>(mutex, ts)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l01470"></a><span class="lineno"> 1470</span>  }</div>
<div class="line"><a name="l01471"></a><span class="lineno"> 1471</span>  Thread::CancelBlock b;</div>
<div class="line"><a name="l01472"></a><span class="lineno"> 1472</span>  obj = q.front();</div>
<div class="line"><a name="l01473"></a><span class="lineno"> 1473</span>  q.pop();</div>
<div class="line"><a name="l01474"></a><span class="lineno"> 1474</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l01475"></a><span class="lineno"> 1475</span>  }</div>
<div class="line"><a name="l01476"></a><span class="lineno"> 1476</span> </div>
<div class="line"><a name="l01477"></a><span class="lineno"> 1477</span>  <span class="keywordtype">bool</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ad9142c4eb251f4646261722b1def46ca">move_pop_timed_dispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac286cee03c4698d9cbc7f850532aa879">value_type</a>& obj, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> millisec) {</div>
<div class="line"><a name="l01478"></a><span class="lineno"> 1478</span>  timespec ts;</div>
<div class="line"><a name="l01479"></a><span class="lineno"> 1479</span>  <a class="code" href="classCgu_1_1Thread_1_1Cond.html#a47b4f8f92444dd9b806002fa4c64a5c7">Thread::Cond::get_abs_time</a>(ts, millisec);</div>
<div class="line"><a name="l01480"></a><span class="lineno"> 1480</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01481"></a><span class="lineno"> 1481</span>  <span class="keywordflow">while</span> (q.empty()) {</div>
<div class="line"><a name="l01482"></a><span class="lineno"> 1482</span>  <span class="keywordflow">if</span> (cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a5fb1c146498f23163d76e830b133df71">timed_wait</a>(mutex, ts)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l01483"></a><span class="lineno"> 1483</span>  }</div>
<div class="line"><a name="l01484"></a><span class="lineno"> 1484</span>  Thread::CancelBlock b;</div>
<div class="line"><a name="l01485"></a><span class="lineno"> 1485</span>  obj = std::move(q.front());</div>
<div class="line"><a name="l01486"></a><span class="lineno"> 1486</span>  q.pop();</div>
<div class="line"><a name="l01487"></a><span class="lineno"> 1487</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l01488"></a><span class="lineno"> 1488</span>  }</div>
<div class="line"><a name="l01489"></a><span class="lineno"> 1489</span> </div>
<div class="line"><a name="l01490"></a><span class="lineno"> 1490</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a70d32d20e0dc0d431b277de3e9478540">pop</a>() {</div>
<div class="line"><a name="l01491"></a><span class="lineno"> 1491</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01492"></a><span class="lineno"> 1492</span>  <span class="keywordflow">if</span> (q.empty()) <span class="keywordflow">throw</span> AsyncQueuePopError();</div>
<div class="line"><a name="l01493"></a><span class="lineno"> 1493</span>  q.pop();</div>
<div class="line"><a name="l01494"></a><span class="lineno"> 1494</span>  }</div>
<div class="line"><a name="l01495"></a><span class="lineno"> 1495</span> </div>
<div class="line"><a name="l01496"></a><span class="lineno"> 1496</span>  <span class="keywordtype">bool</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#acd599f1028f8667898bbda0dda3a6781">empty</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l01497"></a><span class="lineno"> 1497</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01498"></a><span class="lineno"> 1498</span>  <span class="keywordflow">return</span> q.empty();</div>
<div class="line"><a name="l01499"></a><span class="lineno"> 1499</span>  }</div>
<div class="line"><a name="l01500"></a><span class="lineno"> 1500</span> </div>
<div class="line"><a name="l01501"></a><span class="lineno"> 1501</span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a1a62475616b3a704633ba35964d73caa">size_type</a> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a049b5ee1862149123575e942f5ccbd60">size</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l01502"></a><span class="lineno"> 1502</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01503"></a><span class="lineno"> 1503</span>  <span class="keywordflow">return</span> q.size();</div>
<div class="line"><a name="l01504"></a><span class="lineno"> 1504</span>  }</div>
<div class="line"><a name="l01505"></a><span class="lineno"> 1505</span> </div>
<div class="line"><a name="l01506"></a><span class="lineno"> 1506</span>  <span class="keywordtype">void</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a4e6a8f326faf02a401f25616e61ed64f">swap</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>& other) {</div>
<div class="line"><a name="l01507"></a><span class="lineno"> 1507</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &other) {</div>
<div class="line"><a name="l01508"></a><span class="lineno"> 1508</span>  lock2(mutex, other.mutex); <span class="comment">// doesn't throw</span></div>
<div class="line"><a name="l01509"></a><span class="lineno"> 1509</span>  Thread::Mutex::Lock l1{mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01510"></a><span class="lineno"> 1510</span>  Thread::Mutex::Lock l2{other.mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01511"></a><span class="lineno"> 1511</span>  q.swap(other.q);</div>
<div class="line"><a name="l01512"></a><span class="lineno"> 1512</span>  <span class="keywordflow">if</span> (!q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a88f86501defc0d4b648c11c0e9b7b8cf">broadcast</a>();</div>
<div class="line"><a name="l01513"></a><span class="lineno"> 1513</span>  <span class="keywordflow">if</span> (!other.q.empty()) other.cond.broadcast();</div>
<div class="line"><a name="l01514"></a><span class="lineno"> 1514</span>  }</div>
<div class="line"><a name="l01515"></a><span class="lineno"> 1515</span>  }</div>
<div class="line"><a name="l01516"></a><span class="lineno"> 1516</span> </div>
<div class="line"><a name="l01517"></a><span class="lineno"> 1517</span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>& <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#aadbc0e7759e1665d9a2952e4a3a7bb51">operator=</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>& rhs) {</div>
<div class="line"><a name="l01518"></a><span class="lineno"> 1518</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &rhs) {</div>
<div class="line"><a name="l01519"></a><span class="lineno"> 1519</span>  lock2(mutex, rhs.mutex); <span class="comment">// doesn't throw</span></div>
<div class="line"><a name="l01520"></a><span class="lineno"> 1520</span>  Thread::Mutex::Lock l1{mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01521"></a><span class="lineno"> 1521</span>  Thread::Mutex::Lock l2{rhs.mutex, <a class="code" href="namespaceCgu_1_1Thread.html#ae859cc661aefb3465ab878a3f7305910a852f8168e5f00130c64125b059109a35">Thread::locked</a>};</div>
<div class="line"><a name="l01522"></a><span class="lineno"> 1522</span>  Q temp{rhs.q};</div>
<div class="line"><a name="l01523"></a><span class="lineno"> 1523</span>  q.swap(temp);</div>
<div class="line"><a name="l01524"></a><span class="lineno"> 1524</span>  <span class="keywordflow">if</span> (!q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a88f86501defc0d4b648c11c0e9b7b8cf">broadcast</a>();</div>
<div class="line"><a name="l01525"></a><span class="lineno"> 1525</span>  }</div>
<div class="line"><a name="l01526"></a><span class="lineno"> 1526</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l01527"></a><span class="lineno"> 1527</span>  }</div>
<div class="line"><a name="l01528"></a><span class="lineno"> 1528</span> </div>
<div class="line"><a name="l01529"></a><span class="lineno"> 1529</span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>& <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#aadbc0e7759e1665d9a2952e4a3a7bb51">operator=</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>&& rhs) {</div>
<div class="line"><a name="l01530"></a><span class="lineno"> 1530</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01531"></a><span class="lineno"> 1531</span>  q = std::move(rhs.q);</div>
<div class="line"><a name="l01532"></a><span class="lineno"> 1532</span>  <span class="keywordflow">if</span> (!q.empty()) cond.<a class="code" href="classCgu_1_1Thread_1_1Cond.html#a88f86501defc0d4b648c11c0e9b7b8cf">broadcast</a>();</div>
<div class="line"><a name="l01533"></a><span class="lineno"> 1533</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l01534"></a><span class="lineno"> 1534</span>  }</div>
<div class="line"><a name="l01535"></a><span class="lineno"> 1535</span> </div>
<div class="line"><a name="l01536"></a><span class="lineno"> 1536</span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l01537"></a><span class="lineno"> 1537</span> </div>
<div class="line"><a name="l01538"></a><span class="lineno"> 1538</span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>(<a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>&& rhs): q(std::move(rhs.q)) {}</div>
<div class="line"><a name="l01539"></a><span class="lineno"> 1539</span> </div>
<div class="line"><a name="l01540"></a><span class="lineno"> 1540</span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>(<span class="keyword">const</span> <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#a06a3d6fb8c69bd85f6e07e6db16a998f">AsyncQueueDispatch</a>& rhs):</div>
<div class="line"><a name="l01541"></a><span class="lineno"> 1541</span>  q((Thread::Mutex::Lock(rhs.mutex), rhs.q)) {}</div>
<div class="line"><a name="l01542"></a><span class="lineno"> 1542</span> </div>
<div class="line"><a name="l01543"></a><span class="lineno"> 1543</span>  <a class="code" href="classCgu_1_1AsyncQueueDispatch.html#ac132835e664d50875eecd95fdf872a4a">~AsyncQueueDispatch</a>() {</div>
<div class="line"><a name="l01544"></a><span class="lineno"> 1544</span>  Thread::Mutex::Lock lock{mutex};</div>
<div class="line"><a name="l01545"></a><span class="lineno"> 1545</span>  }</div>
<div class="line"><a name="l01546"></a><span class="lineno"> 1546</span> </div>
<div class="line"><a name="l01547"></a><span class="lineno"> 1547</span>  <a class="code" href="cgu__config_8h.html#a13241741f6a47356f61508faea37c35a">CGU_GLIB_MEMORY_SLICES_FUNCS</a></div>
<div class="line"><a name="l01548"></a><span class="lineno"> 1548</span> };</div>
<div class="line"><a name="l01549"></a><span class="lineno"> 1549</span> </div>
<div class="line"><a name="l01550"></a><span class="lineno"> 1550</span> <span class="preprocessor">#endif // CGU_USE_INHERITABLE_QUEUE</span></div>
<div class="line"><a name="l01551"></a><span class="lineno"> 1551</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01552"></a><span class="lineno"> 1552</span> } <span class="comment">// namespace Cgu</span></div>
<div class="line"><a name="l01553"></a><span class="lineno"> 1553</span> </div>
<div class="line"><a name="l01554"></a><span class="lineno"> 1554</span> <span class="preprocessor">#endif</span></div>
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