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<a href="a00269.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">// Guarded Allocation -*- C++ -*-</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright (C) 2014-2018 Free Software Foundation, Inc.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// software; you can redistribute it and/or modify it under the</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// terms of the GNU General Public License as published by the</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// This library is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// GNU General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// You should have received a copy of the GNU General Public License and</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/** @file bits/allocated_ptr.h</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * This is an internal header file, included by other library headers.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * Do not attempt to use it directly. @headername{memory}</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> */</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#ifndef _ALLOCATED_PTR_H</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#define _ALLOCATED_PTR_H 1</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#if __cplusplus < 201103L</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor"># include <bits/c++0xwarning.h></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor"># include <<a class="code" href="a00167.html">type_traits</a>></span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor"># include <<a class="code" href="a00446.html">bits/ptr_traits.h</a>></span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor"># include <<a class="code" href="a16476.html">bits/alloc_traits.h</a>></span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">namespace </span><a class="code" href="a01541.html">std</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> {</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"></span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> /// Non-standard RAII type for managing pointers obtained from allocators.</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="a04695.html"> 46</a></span>  <span class="keyword">struct </span><a class="code" href="a04695.html">__allocated_ptr</a></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  {</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">using</span> pointer = <span class="keyword">typename</span> <a class="code" href="a04639.html#a4931a231115cbef628c29b147a7d7336">allocator_traits<_Alloc>::pointer</a>;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">using</span> value_type = <span class="keyword">typename</span> <a class="code" href="a04639.html#aa51dca0f6ab162918c10679e8feb57df">allocator_traits<_Alloc>::value_type</a>;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> /// Take ownership of __ptr</span></div><div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="a04695.html#aa6dc842b0059cbc04204b7b85c0739ed"> 52</a></span> <span class="comment"></span> <a class="code" href="a04695.html#aa6dc842b0059cbc04204b7b85c0739ed">__allocated_ptr</a>(_Alloc& __a, pointer __ptr) noexcept</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  : _M_alloc(<a class="code" href="a01480.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__a)), _M_ptr(__ptr)</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</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"> /// Convert __ptr to allocator's pointer type and take ownership of it</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr,</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">typename</span> _Req = _Require<is_same<_Ptr, value_type*>>></div><div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="a04695.html#a966c17e818aa46f93c352e1ae4bf872a"> 59</a></span>  <a class="code" href="a04695.html#a966c17e818aa46f93c352e1ae4bf872a">__allocated_ptr</a>(_Alloc& __a, _Ptr __ptr)</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  : _M_alloc(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#ga1954d5552e24586051011312041033f6">__addressof</a>(__a)),</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  _M_ptr(<a class="code" href="a06251.html">pointer_traits</a><pointer>::pointer_to(*__ptr))</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  { }</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"></span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> /// Transfer ownership of the owned pointer</span></div><div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="a04695.html#a039de128ed7917b07a0a0b10e491a6af"> 65</a></span> <span class="comment"></span> <a class="code" href="a04695.html#a039de128ed7917b07a0a0b10e491a6af">__allocated_ptr</a>(<a class="code" href="a04695.html">__allocated_ptr</a>&& __gd) noexcept</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  : _M_alloc(__gd._M_alloc), _M_ptr(__gd._M_ptr)</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  { __gd._M_ptr = <span class="keyword">nullptr</span>; }</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"></span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> /// Deallocate the owned pointer</span></div><div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="a04695.html#aa88dd0de1ff3b4586cde0906dc41645f"> 70</a></span> <span class="comment"></span> <a class="code" href="a04695.html#aa88dd0de1ff3b4586cde0906dc41645f">~__allocated_ptr</a>()</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  {</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">if</span> (_M_ptr != <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <a class="code" href="a04639.html#ae5f6b86b98b17e2ba39243ca8eaf4ee1">std::allocator_traits<_Alloc>::deallocate</a>(*_M_alloc, _M_ptr, 1);</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  }</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> /// Release ownership of the owned pointer</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"></span> <a class="code" href="a04695.html">__allocated_ptr</a>&</div><div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="a04695.html#af6ed2d0a405aee06f81dda8452a6e2ce"> 78</a></span>  <a class="code" href="a04695.html#af6ed2d0a405aee06f81dda8452a6e2ce">operator=</a>(std::nullptr_t) noexcept</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  {</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  _M_ptr = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"></span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> /// Get the address that the owned pointer refers to.</span></div><div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="a04695.html#a8c2790a1ba48d3f00a77feb0eda93b19"> 85</a></span> <span class="comment"></span> value_type* <a class="code" href="a04695.html#a8c2790a1ba48d3f00a77feb0eda93b19">get</a>() { <span class="keywordflow">return</span> std::__to_address(_M_ptr); }</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  _Alloc* _M_alloc;</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  pointer _M_ptr;</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  };</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"></span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> /// Allocate space for a single object using __a</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Alloc></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  __allocated_ptr<_Alloc></div><div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="a01541.html#a1fa3f7679aec1619e37fddf24eb70a11"> 95</a></span>  <a class="code" href="a01541.html#a1fa3f7679aec1619e37fddf24eb70a11">__allocate_guarded</a>(_Alloc& __a)</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  {</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">return</span> { __a, <a class="code" href="a04639.html#a1afbf725286c9e82ba6166dcc04b10bc">std::allocator_traits<_Alloc>::allocate</a>(__a, 1) };</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</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"> 100</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> } <span class="comment">// namespace std</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> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="a04695_html_a8c2790a1ba48d3f00a77feb0eda93b19"><div class="ttname"><a href="a04695.html#a8c2790a1ba48d3f00a77feb0eda93b19">std::__allocated_ptr::get</a></div><div class="ttdeci">value_type * get()</div><div class="ttdoc">Get the address that the owned pointer refers to.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00085">allocated_ptr.h:85</a></div></div>
<div class="ttc" id="a04639_html_a1afbf725286c9e82ba6166dcc04b10bc"><div class="ttname"><a href="a04639.html#a1afbf725286c9e82ba6166dcc04b10bc">std::allocator_traits::allocate</a></div><div class="ttdeci">static pointer allocate(_Alloc &__a, size_type __n)</div><div class="ttdoc">Allocate memory.</div><div class="ttdef"><b>Definition:</b> <a href="a16476_source.html#l00300">bits/alloc_traits.h:300</a></div></div>
<div class="ttc" id="a04639_html_aa51dca0f6ab162918c10679e8feb57df"><div class="ttname"><a href="a04639.html#aa51dca0f6ab162918c10679e8feb57df">std::allocator_traits::value_type</a></div><div class="ttdeci">_Alloc::value_type value_type</div><div class="ttdoc">The allocated type.</div><div class="ttdef"><b>Definition:</b> <a href="a16476_source.html#l00088">bits/alloc_traits.h:88</a></div></div>
<div class="ttc" id="a01480_html_ga1954d5552e24586051011312041033f6"><div class="ttname"><a href="a01480.html#ga1954d5552e24586051011312041033f6">std::__addressof</a></div><div class="ttdeci">constexpr _Tp * __addressof(_Tp &__r) noexcept</div><div class="ttdoc">Same as C++11 std::addressof.</div><div class="ttdef"><b>Definition:</b> <a href="a00422_source.html#l00047">move.h:47</a></div></div>
<div class="ttc" id="a00167_html"><div class="ttname"><a href="a00167.html">type_traits</a></div></div>
<div class="ttc" id="a01541_html_a1fa3f7679aec1619e37fddf24eb70a11"><div class="ttname"><a href="a01541.html#a1fa3f7679aec1619e37fddf24eb70a11">std::__allocate_guarded</a></div><div class="ttdeci">__allocated_ptr< _Alloc > __allocate_guarded(_Alloc &__a)</div><div class="ttdoc">Allocate space for a single object using __a.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00095">allocated_ptr.h:95</a></div></div>
<div class="ttc" id="a04695_html_a039de128ed7917b07a0a0b10e491a6af"><div class="ttname"><a href="a04695.html#a039de128ed7917b07a0a0b10e491a6af">std::__allocated_ptr::__allocated_ptr</a></div><div class="ttdeci">__allocated_ptr(__allocated_ptr &&__gd) noexcept</div><div class="ttdoc">Transfer ownership of the owned pointer.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00065">allocated_ptr.h:65</a></div></div>
<div class="ttc" id="a01541_html"><div class="ttname"><a href="a01541.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std.</div></div>
<div class="ttc" id="a04695_html_aa88dd0de1ff3b4586cde0906dc41645f"><div class="ttname"><a href="a04695.html#aa88dd0de1ff3b4586cde0906dc41645f">std::__allocated_ptr::~__allocated_ptr</a></div><div class="ttdeci">~__allocated_ptr()</div><div class="ttdoc">Deallocate the owned pointer.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00070">allocated_ptr.h:70</a></div></div>
<div class="ttc" id="a00446_html"><div class="ttname"><a href="a00446.html">ptr_traits.h</a></div></div>
<div class="ttc" id="a04639_html_a4931a231115cbef628c29b147a7d7336"><div class="ttname"><a href="a04639.html#a4931a231115cbef628c29b147a7d7336">std::allocator_traits::pointer</a></div><div class="ttdeci">__detected_or_t< value_type *, __pointer, _Alloc > pointer</div><div class="ttdoc">The allocator's pointer type.</div><div class="ttdef"><b>Definition:</b> <a href="a16476_source.html#l00095">bits/alloc_traits.h:95</a></div></div>
<div class="ttc" id="a04695_html_af6ed2d0a405aee06f81dda8452a6e2ce"><div class="ttname"><a href="a04695.html#af6ed2d0a405aee06f81dda8452a6e2ce">std::__allocated_ptr::operator=</a></div><div class="ttdeci">__allocated_ptr & operator=(std::nullptr_t) noexcept</div><div class="ttdoc">Release ownership of the owned pointer.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00078">allocated_ptr.h:78</a></div></div>
<div class="ttc" id="a04695_html"><div class="ttname"><a href="a04695.html">std::__allocated_ptr</a></div><div class="ttdoc">Non-standard RAII type for managing pointers obtained from allocators.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00046">allocated_ptr.h:46</a></div></div>
<div class="ttc" id="a04639_html_ae5f6b86b98b17e2ba39243ca8eaf4ee1"><div class="ttname"><a href="a04639.html#ae5f6b86b98b17e2ba39243ca8eaf4ee1">std::allocator_traits::deallocate</a></div><div class="ttdeci">static void deallocate(_Alloc &__a, pointer __p, size_type __n)</div><div class="ttdoc">Deallocate memory.</div><div class="ttdef"><b>Definition:</b> <a href="a16476_source.html#l00327">bits/alloc_traits.h:327</a></div></div>
<div class="ttc" id="a16476_html"><div class="ttname"><a href="a16476.html">alloc_traits.h</a></div></div>
<div class="ttc" id="a06251_html"><div class="ttname"><a href="a06251.html">std::pointer_traits</a></div><div class="ttdoc">Uniform interface to all pointer-like types.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00078">ptr_traits.h:78</a></div></div>
<div class="ttc" id="a04695_html_a966c17e818aa46f93c352e1ae4bf872a"><div class="ttname"><a href="a04695.html#a966c17e818aa46f93c352e1ae4bf872a">std::__allocated_ptr::__allocated_ptr</a></div><div class="ttdeci">__allocated_ptr(_Alloc &__a, _Ptr __ptr)</div><div class="ttdoc">Convert __ptr to allocator's pointer type and take ownership of it.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00059">allocated_ptr.h:59</a></div></div>
<div class="ttc" id="a04695_html_aa6dc842b0059cbc04204b7b85c0739ed"><div class="ttname"><a href="a04695.html#aa6dc842b0059cbc04204b7b85c0739ed">std::__allocated_ptr::__allocated_ptr</a></div><div class="ttdeci">__allocated_ptr(_Alloc &__a, pointer __ptr) noexcept</div><div class="ttdoc">Take ownership of __ptr.</div><div class="ttdef"><b>Definition:</b> <a href="a00269_source.html#l00052">allocated_ptr.h:52</a></div></div>
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