<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.3.1"/> <title>xrootd: XrdOucDLlist.hh Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">xrootd </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.3.1 --> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul> </div> <div id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>File Members</span></a></li> </ul> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_a84cd9d3995a3fdd61364d705353c9e4.html">XrdOuc</a></li> </ul> </div> </div><!-- top --> <div class="header"> <div class="headertitle"> <div class="title">XrdOucDLlist.hh</div> </div> </div><!--header--> <div class="contents"> <a href="XrdOucDLlist_8hh.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="preprocessor">#ifndef __OUC_DLIST__</span></div> <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor"></span><span class="preprocessor">#define __OUC_DLIST__</span></div> <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="preprocessor"></span><span class="comment">/******************************************************************************/</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">/* X r d O u c D L l i s t . h h */</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">/*(c) 2003 by the Board of Trustees of the Leland Stanford, Jr., University */</span></div> <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">/* All Rights Reserved */</span></div> <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">/*Produced by Andrew Hanushevsky for Stanford University under contract */</span></div> <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">/* DE-AC02-76-SFO0515 with the Deprtment of Energy */</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 file is part of the XRootD software suite. */</span></div> <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">/* */</span></div> <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">/* XRootD is free software: you can redistribute it and/or modify it under */</span></div> <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">/* the terms of the GNU Lesser General Public License as published by the */</span></div> <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">/* Free Software Foundation, either version 3 of the License, or (at your */</span></div> <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">/* option) any later version. */</span></div> <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">/* */</span></div> <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">/* XRootD is distributed in the hope that it will be useful, but WITHOUT */</span></div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */</span></div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */</span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">/* License for more details. */</span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">/* */</span></div> <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">/* You should have received a copy of the GNU Lesser General Public License */</span></div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */</span></div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">/* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */</span></div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">/* */</span></div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">/* The copyright holder's institutional names and contributor's names may not */</span></div> <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">/* be used to endorse or promote products derived from this software without */</span></div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">/* specific prior written permission of the institution or contributor. */</span></div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">/******************************************************************************/</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> </div> <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">template</span><<span class="keyword">class</span> T></div> <div class="line"><a name="l00035"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html"> 35</a></span> <span class="keyword">class </span><a class="code" href="classXrdOucDLlist.html">XrdOucDLlist</a></div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> {</div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">public</span>:</div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div> <div class="line"><a name="l00039"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#a1f8c55d9372819fb22ddb873e039dc26"> 39</a></span>  <a class="code" href="classXrdOucDLlist.html#a1f8c55d9372819fb22ddb873e039dc26">XrdOucDLlist</a>(T *itemval=0) {<a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a>=<span class="keyword">this</span>; <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a>=<span class="keyword">this</span>; <a class="code" href="classXrdOucDLlist.html#a4827f19d0eec6694927d983ab531d809">item</a>=itemval;}</div> <div class="line"><a name="l00040"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#a5d28280e1481d8e096c0756d16f36093"> 40</a></span>  <a class="code" href="classXrdOucDLlist.html#a5d28280e1481d8e096c0756d16f36093">~XrdOucDLlist</a>() {<span class="keywordflow">if</span> (<a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a> != <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a>) <a class="code" href="classXrdOucDLlist.html#ac139f935fbe370aec456f268e5b81998">Remove</a>();}</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> <span class="comment">// Apply() applies the specified function to every item in the list. Apply()</span></div> <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">// is pointer-safe in that the current node pointers may be changed</span></div> <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// without affecting the traversal of the list. An argument may be</span></div> <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// passed to the function. A null pointer is returned if the list</span></div> <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">// was completely traversed. Otherwise, the pointer to the node on</span></div> <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// which the applied function returned a non-zero value is returned.</span></div> <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// An optional starting point may be passed.</span></div> <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">//</span></div> <div class="line"><a name="l00050"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#af40c8142bae1ab0ed7ef54b9ba47b709"> 50</a></span> T *<a class="code" href="classXrdOucDLlist.html#af40c8142bae1ab0ed7ef54b9ba47b709">Apply</a>(<span class="keywordtype">int</span> (*func)(T *, <span class="keywordtype">void</span> *), <span class="keywordtype">void</span> *Arg, <a class="code" href="classXrdOucDLlist.html">XrdOucDLlist</a> *Start=0)</div> <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  {<a class="code" href="classXrdOucDLlist.html">XrdOucDLlist</a> *nextnode, *node;</div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">if</span> (Start) node = Start; <span class="comment">// Set correct starting point</span></div> <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">else</span> node = <span class="keyword">this</span>;</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">// Iterate through the list until we hit ourselves again. We do the </span></div> <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// loop once on the current node to allow for anchorless lists.</span></div> <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">//</span></div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">do</span> {nextnode = node-><a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a>;</div> <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">if</span> (node-><a class="code" href="classXrdOucDLlist.html#a4827f19d0eec6694927d983ab531d809">item</a> && (*func)(node-><a class="code" href="classXrdOucDLlist.html#a4827f19d0eec6694927d983ab531d809">item</a>, Arg)) <span class="keywordflow">return</span> node-><a class="code" href="classXrdOucDLlist.html#a4827f19d0eec6694927d983ab531d809">item</a>;</div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  node = nextnode;</div> <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  } <span class="keywordflow">while</span> (node != <span class="keyword">this</span>);</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">// All done, indicate we went through the whole list</span></div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">//</span></div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> (T *)0;</div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div> <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// Insert() inserts the specified node immediately off itself. If an item value</span></div> <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment">// is not given, it is not changed.</span></div> <div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment">//</span></div> <div class="line"><a name="l00071"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#a7a7db12ef192cda97c4f73c158d70162"> 71</a></span> <span class="keywordtype">void</span> <a class="code" href="classXrdOucDLlist.html#a7a7db12ef192cda97c4f73c158d70162">Insert</a>(<a class="code" href="classXrdOucDLlist.html">XrdOucDLlist</a> *Node, T *<a class="code" href="classXrdOucDLlist.html#aeeaba3f6b75a66421af20fd21bd93ab5">Item</a>=0)</div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  {Node-><a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a> = <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a>; <span class="comment">// Chain in the item;</span></div> <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a>-><a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a> = Node;</div> <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a> = Node;</div> <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  Node-><a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a> = <span class="keyword">this</span>;</div> <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">if</span> (<a class="code" href="classXrdOucDLlist.html#aeeaba3f6b75a66421af20fd21bd93ab5">Item</a>) Node-><a class="code" href="classXrdOucDLlist.html#a4827f19d0eec6694927d983ab531d809">item</a> = <a class="code" href="classXrdOucDLlist.html#aeeaba3f6b75a66421af20fd21bd93ab5">Item</a>;</div> <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  }</div> <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div> <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment">// Item() supplies the item value associated with itself (used with Next()).</span></div> <div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment">//</span></div> <div class="line"><a name="l00081"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#aeeaba3f6b75a66421af20fd21bd93ab5"> 81</a></span> T *<a class="code" href="classXrdOucDLlist.html#aeeaba3f6b75a66421af20fd21bd93ab5">Item</a>() {<span class="keywordflow">return</span> <a class="code" href="classXrdOucDLlist.html#a4827f19d0eec6694927d983ab531d809">item</a>;}</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">// Remove() removes itself from whatever list it happens to be in.</span></div> <div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment">//</span></div> <div class="line"><a name="l00085"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#ac139f935fbe370aec456f268e5b81998"> 85</a></span> <span class="keywordtype">void</span> <a class="code" href="classXrdOucDLlist.html#ac139f935fbe370aec456f268e5b81998">Remove</a>()</div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  {<a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a>-><a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a> = <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a>; <span class="comment">// Unchain the item</span></div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a>-><a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a> = <a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a>;</div> <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a> = <span class="keyword">this</span>;</div> <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a> = <span class="keyword">this</span>;</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> </div> <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment">// Next() supplies the next list node.</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"><a class="code" href="classXrdOucDLlist.html#a90a066c7ea697f6fa965bd9626feefae"> 94</a></span> <a class="code" href="classXrdOucDLlist.html">XrdOucDLlist</a> *<a class="code" href="classXrdOucDLlist.html#a90a066c7ea697f6fa965bd9626feefae">Next</a>() {<span class="keywordflow">return</span> <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a>;}</div> <div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div> <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">// Prev() supplies the prev list node.</span></div> <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">//</span></div> <div class="line"><a name="l00098"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#a2c45a9a0f861bfd9aeca8a9c32726b17"> 98</a></span> <a class="code" href="classXrdOucDLlist.html">XrdOucDLlist</a> *<a class="code" href="classXrdOucDLlist.html#a2c45a9a0f861bfd9aeca8a9c32726b17">Prev</a>() {<span class="keywordflow">return</span> <a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a>;}</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> <span class="comment">// Set the item pointer</span></div> <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">//</span></div> <div class="line"><a name="l00102"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#a20e225fd38b6c4e887fbb79b39e22e13"> 102</a></span> <span class="keywordtype">void</span> <a class="code" href="classXrdOucDLlist.html#a20e225fd38b6c4e887fbb79b39e22e13">setItem</a>(T *ival) {<a class="code" href="classXrdOucDLlist.html#a4827f19d0eec6694927d983ab531d809">item</a> = ival;}</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">// Singleton() indicates whether or not the node points to something</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"><a class="code" href="classXrdOucDLlist.html#a104c45e4f09c917f7a4ba6f2ae7cfce1"> 106</a></span> <span class="keywordtype">int</span> <a class="code" href="classXrdOucDLlist.html#a104c45e4f09c917f7a4ba6f2ae7cfce1">Singleton</a>() {<span class="keywordflow">return</span> <a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a> == <span class="keyword">this</span>;}</div> <div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div> <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">private</span>:</div> <div class="line"><a name="l00109"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0"> 109</a></span> <a class="code" href="classXrdOucDLlist.html">XrdOucDLlist</a> *<a class="code" href="classXrdOucDLlist.html#acc4b1fccd39af18c2b00bfcdd183bce0">next</a>;</div> <div class="line"><a name="l00110"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2"> 110</a></span> <a class="code" href="classXrdOucDLlist.html">XrdOucDLlist</a> *<a class="code" href="classXrdOucDLlist.html#a64cef311510953a46bd50af5df7b23b2">prev</a>;</div> <div class="line"><a name="l00111"></a><span class="lineno"><a class="code" href="classXrdOucDLlist.html#a4827f19d0eec6694927d983ab531d809"> 111</a></span> T *<a class="code" href="classXrdOucDLlist.html#a4827f19d0eec6694927d983ab531d809">item</a>;</div> <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> };</div> <div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="preprocessor">#endif</span></div> </div><!-- fragment --></div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.3.1 </small></address> </body> </html>