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<a href="apr__shm_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/* Licensed to the Apache Software Foundation (ASF) under one or more</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> * contributor license agreements. See the NOTICE file distributed with</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> * this work for additional information regarding copyright ownership.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> * (the "License"); you may not use this file except in compliance with</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"> * the License. You may obtain a copy of the License at</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment"> *</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment"> *</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="comment"> * See the License for the specific language governing permissions and</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment"> * limitations under the License.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment"> */</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#ifndef APR_SHM_H</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#define APR_SHM_H</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="comment"></span> </div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="comment">/**</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="comment"> * @file apr_shm.h</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="comment"> * @brief APR Shared Memory Routines</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="comment"> */</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="preprocessor">#include "<a class="code" href="apr_8h.html">apr.h</a>"</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#include "<a class="code" href="apr__pools_8h.html">apr_pools.h</a>"</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="preprocessor">#include "<a class="code" href="apr__errno_8h.html">apr_errno.h</a>"</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="preprocessor">#include "<a class="code" href="apr__perms__set_8h.html">apr_perms_set.h</a>"</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="preprocessor">#endif </span><span class="comment">/* __cplusplus */</span><span class="preprocessor"></span></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="comment"></span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="comment">/**</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="comment"> * @defgroup apr_shm Shared Memory Routines</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="comment"> * @ingroup APR </span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="comment"> * @{</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="comment"> */</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="comment"></span> </div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="comment">/**</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="comment"> * Private, platform-specific data struture representing a shared memory</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="comment"> * segment.</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="comment"> */</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"><a class="line" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f"> 44</a></span><span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> <a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a>;</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="comment"></span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="comment">/**</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span><span class="comment"> * Create and make accessible a shared memory segment with default</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="comment"> * properties.</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="comment"> * @param m The shared memory structure to create.</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span><span class="comment"> * @param reqsize The desired size of the segment.</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span><span class="comment"> * @param filename The file to use for shared memory on platforms that</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span><span class="comment"> * require it.</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span><span class="comment"> * @param pool the pool from which to allocate the shared memory</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span><span class="comment"> * structure.</span></div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span><span class="comment"> * @remark A note about Anonymous vs. Named shared memory segments:</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span><span class="comment"> * Not all plaforms support anonymous shared memory segments, but in</span></div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span><span class="comment"> * some cases it is prefered over other types of shared memory</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span><span class="comment"> * implementations. Passing a NULL 'file' parameter to this function</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span><span class="comment"> * will cause the subsystem to use anonymous shared memory segments.</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span><span class="comment"> * If such a system is not available, APR_ENOTIMPL is returned.</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span><span class="comment"> * @remark A note about allocation sizes:</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span><span class="comment"> * On some platforms it is necessary to store some metainformation</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span><span class="comment"> * about the segment within the actual segment. In order to supply</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span><span class="comment"> * the caller with the requested size it may be necessary for the</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span><span class="comment"> * implementation to request a slightly greater segment length</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span><span class="comment"> * from the subsystem. In all cases, the apr_shm_baseaddr_get()</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span><span class="comment"> * function will return the first usable byte of memory.</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span><span class="comment"> * </span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span><span class="comment"> */</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"><a class="line" href="group__apr__shm.html#gac370c4943c22505ce2b0d57c51805480"> 70</a></span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(<a class="code hl_typedef" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a>) <a class="code hl_function" href="group__apr__shm.html#gac370c4943c22505ce2b0d57c51805480">apr_shm_create</a>(<a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> **m,</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> apr_size_t reqsize,</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *filename,</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <a class="code hl_typedef" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a> *pool);</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span><span class="comment"></span> </div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span><span class="comment">/**</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span><span class="comment"> * Special processing flags for apr_shm_create_ex() and apr_shm_attach_ex().</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span><span class="comment"> */</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"><a class="line" href="group__apr__shm.html#ga47cc28ddc5f32cf904383b9e4f82825b"> 78</a></span><span class="preprocessor">#define APR_SHM_NS_LOCAL 1 </span><span class="comment">/* Create or attach to named shared memory</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span><span class="comment"> * segment in the "Local" namespace on</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span><span class="comment"> * Windows. (Ignored on other platforms.)</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span><span class="comment"> * By default, the "Global" namespace is</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span><span class="comment"> * used for privileged processes and the</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span><span class="comment"> * "Local" namespace is used otherwise.</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span><span class="comment"> */</span><span class="preprocessor"></span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span><span class="preprocessor">#define APR_SHM_NS_GLOBAL 2 </span><span class="comment">/* Create or attach to named shared memory</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span><span class="comment"> * segment in the "Global" namespace on</span></div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span><span class="comment"> * Windows. (Ignored on other platforms.)</span></div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span><span class="comment"> */</span><span class="preprocessor"></span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span><span class="comment"></span> </div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span><span class="comment">/**</span></div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span><span class="comment"> * Create and make accessible a shared memory segment with platform-</span></div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span><span class="comment"> * specific processing.</span></div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span><span class="comment"> * @param m The shared memory structure to create.</span></div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span><span class="comment"> * @param reqsize The desired size of the segment.</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span><span class="comment"> * @param filename The file to use for shared memory on platforms that</span></div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span><span class="comment"> * require it.</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span><span class="comment"> * @param pool the pool from which to allocate the shared memory</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span><span class="comment"> * structure.</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span><span class="comment"> * @param flags mask of APR_SHM_* (defined above)</span></div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span><span class="comment"> * @remark A note about Anonymous vs. Named shared memory segments:</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span><span class="comment"> * Not all plaforms support anonymous shared memory segments, but in</span></div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span><span class="comment"> * some cases it is prefered over other types of shared memory</span></div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span><span class="comment"> * implementations. Passing a NULL 'file' parameter to this function</span></div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span><span class="comment"> * will cause the subsystem to use anonymous shared memory segments.</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span><span class="comment"> * If such a system is not available, APR_ENOTIMPL is returned.</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"><a class="line" href="group__apr__shm.html#ga21baaa66956641e06e072501f61882e7"> 106</a></span><span class="comment"> * @remark A note about allocation sizes:</span></div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span><span class="comment"> * On some platforms it is necessary to store some metainformation</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span><span class="comment"> * about the segment within the actual segment. In order to supply</span></div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span><span class="comment"> * the caller with the requested size it may be necessary for the</span></div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span><span class="comment"> * implementation to request a slightly greater segment length</span></div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span><span class="comment"> * from the subsystem. In all cases, the apr_shm_baseaddr_get()</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span><span class="comment"> * function will return the first usable byte of memory.</span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span><span class="comment"> * </span></div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span><span class="comment"> */</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(<a class="code hl_typedef" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a>) <a class="code hl_function" href="group__apr__shm.html#ga21baaa66956641e06e072501f61882e7">apr_shm_create_ex</a>(<a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> **m,</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> apr_size_t reqsize,</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *filename,</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <a class="code hl_typedef" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a> *pool,</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> apr_int32_t flags);</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span><span class="comment"></span> </div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span><span class="comment">/**</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span><span class="comment"> * Remove named resource associated with a shared memory segment,</span></div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span><span class="comment"> * preventing attachments to the resource, but not destroying it.</span></div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span><span class="comment"> * @param filename The filename associated with shared-memory segment which</span></div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span><span class="comment"> * needs to be removed</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span><span class="comment"> * @param pool The pool used for file operations</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"><a class="line" href="group__apr__shm.html#gaee8b7d9b952ff6157ddbb00fabb477e0"> 127</a></span><span class="comment"> * @remark This function is only supported on platforms which support</span></div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span><span class="comment"> * name-based shared memory segments, and will return APR_ENOTIMPL on</span></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span><span class="comment"> * platforms without such support. Removing the file while the shm</span></div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span><span class="comment"> * is in use is not entirely portable, caller may use this to enhance</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span><span class="comment"> * obscurity of the resource, but be prepared for the call to fail,</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span><span class="comment"> * and for concurrent attempts to create a resource of the same name</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span><span class="comment"> * to also fail. The pool cleanup of apr_shm_create (apr_shm_destroy)</span></div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span><span class="comment"> * also removes the named resource.</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span><span class="comment"> */</span></div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(<a class="code hl_typedef" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a>) <a class="code hl_function" href="group__apr__shm.html#gaee8b7d9b952ff6157ddbb00fabb477e0">apr_shm_remove</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *filename,</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <a class="code hl_typedef" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a> *pool);</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span><span class="comment"></span> </div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span><span class="comment">/**</span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span><span class="comment"> * Delete named resource associated with a shared memory segment,</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span><span class="comment"> * preventing attachments to the resource.</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span><span class="comment"> * @param m The shared memory segment structure to delete.</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"><a class="line" href="group__apr__shm.html#gab5399f04b93193bead435217f46087fd"> 143</a></span><span class="comment"> * @remark This function is only supported on platforms which support</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span><span class="comment"> * name-based shared memory segments, and will return APR_ENOTIMPL on</span></div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span><span class="comment"> * platforms without such support. Removing the file while the shm</span></div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span><span class="comment"> * is in use is not entirely portable, caller may use this to enhance</span></div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span><span class="comment"> * obscurity of the resource, but be prepared for the call to fail,</span></div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span><span class="comment"> * and for concurrent attempts to create a resource of the same name</span></div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"><a class="line" href="group__apr__shm.html#ga7de5b65a9c7d9840bfa289854f8d59d4"> 149</a></span><span class="comment"> * to also fail. The pool cleanup of apr_shm_create (apr_shm_destroy)</span></div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span><span class="comment"> * also removes the named resource.</span></div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span><span class="comment"> */</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(<a class="code hl_typedef" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a>) <a class="code hl_function" href="group__apr__shm.html#gab5399f04b93193bead435217f46087fd">apr_shm_delete</a>(<a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> *m);</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span><span class="comment"></span> </div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span><span class="comment">/**</span></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span><span class="comment"> * Destroy a shared memory segment and associated memory.</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span><span class="comment"> * @param m The shared memory segment structure to destroy.</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span><span class="comment"> */</span></div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(<a class="code hl_typedef" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a>) <a class="code hl_function" href="group__apr__shm.html#ga7de5b65a9c7d9840bfa289854f8d59d4">apr_shm_destroy</a>(<a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> *m);</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span><span class="comment"></span> </div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"><a class="line" href="group__apr__shm.html#ga0e542941c280cb72b78e30d452464759"> 160</a></span><span class="comment">/**</span></div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span><span class="comment"> * Attach to a shared memory segment that was created</span></div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span><span class="comment"> * by another process.</span></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span><span class="comment"> * @param m The shared memory structure to create.</span></div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span><span class="comment"> * @param filename The file used to create the original segment.</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span><span class="comment"> * (This MUST match the original filename.)</span></div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span><span class="comment"> * @param pool the pool from which to allocate the shared memory</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span><span class="comment"> * structure for this process.</span></div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span><span class="comment"> */</span></div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(<a class="code hl_typedef" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a>) <a class="code hl_function" href="group__apr__shm.html#ga0e542941c280cb72b78e30d452464759">apr_shm_attach</a>(<a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> **m,</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *filename,</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> <a class="code hl_typedef" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a> *pool);</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span><span class="comment"></span> </div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span><span class="comment">/**</span></div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"><a class="line" href="group__apr__shm.html#ga088260723c96815610ff628f358d3630"> 174</a></span><span class="comment"> * Attach to a shared memory segment that was created</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span><span class="comment"> * by another process, with platform-specific processing.</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span><span class="comment"> * @param m The shared memory structure to create.</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span><span class="comment"> * @param filename The file used to create the original segment.</span></div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span><span class="comment"> * (This MUST match the original filename.)</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span><span class="comment"> * @param pool the pool from which to allocate the shared memory</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span><span class="comment"> * structure for this process.</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span><span class="comment"> * @param flags mask of APR_SHM_* (defined above)</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span><span class="comment"> */</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(<a class="code hl_typedef" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a>) <a class="code hl_function" href="group__apr__shm.html#ga088260723c96815610ff628f358d3630">apr_shm_attach_ex</a>(<a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> **m,</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"><a class="line" href="group__apr__shm.html#ga900095a06d3fdb4cdd04ca4449a9d42a"> 184</a></span> <span class="keyword">const</span> <span class="keywordtype">char</span> *filename,</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> <a class="code hl_typedef" href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a> *pool,</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> apr_int32_t flags);</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span><span class="comment"></span> </div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span><span class="comment">/**</span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span><span class="comment"> * Detach from a shared memory segment without destroying it.</span></div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span><span class="comment"> * @param m The shared memory structure representing the segment</span></div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span><span class="comment"> * to detach from.</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span><span class="comment"> */</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(<a class="code hl_typedef" href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a>) <a class="code hl_function" href="group__apr__shm.html#ga900095a06d3fdb4cdd04ca4449a9d42a">apr_shm_detach</a>(<a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> *m);</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span><span class="comment"></span> </div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"><a class="line" href="group__apr__shm.html#gab152ede0741aac78d34da3f55649553b"> 195</a></span><span class="comment">/**</span></div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span><span class="comment"> * Retrieve the base address of the shared memory segment.</span></div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span><span class="comment"> * NOTE: This address is only usable within the callers address</span></div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span><span class="comment"> * space, since this API does not guarantee that other attaching</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span><span class="comment"> * processes will maintain the same address mapping.</span></div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span><span class="comment"> * @param m The shared memory segment from which to retrieve</span></div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span><span class="comment"> * the base address.</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"><a class="line" href="group__apr__shm.html#ga557ae85d3f225620a77ad80caeaacac7"> 202</a></span><span class="comment"> * @return address, aligned by APR_ALIGN_DEFAULT.</span></div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span><span class="comment"> */</span></div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(<span class="keywordtype">void</span> *) <a class="code hl_function" href="group__apr__shm.html#gab152ede0741aac78d34da3f55649553b">apr_shm_baseaddr_get</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> *m);</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span><span class="comment"></span> </div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span><span class="comment">/**</span></div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"><a class="line" href="group__apr__shm.html#gaf519a2435ffc3524a8b9ba0b67fe7aa5"> 207</a></span><span class="comment"> * Retrieve the length of a shared memory segment in bytes.</span></div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span><span class="comment"> * @param m The shared memory segment from which to retrieve</span></div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span><span class="comment"> * the segment length.</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span><span class="comment"> */</span></div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span><a class="code hl_define" href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a>(apr_size_t) <a class="code hl_function" href="group__apr__shm.html#ga557ae85d3f225620a77ad80caeaacac7">apr_shm_size_get</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a> *m);</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"><a class="line" href="group__apr__shm.html#ga5452a6617c5d772e11bf8f994445d668"> 212</a></span><span class="comment"></span> </div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span><span class="comment">/**</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span><span class="comment"> * Set shared memory permissions.</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span><span class="comment"> */</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span>APR_PERMS_SET_IMPLEMENT(shm);</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span><span class="comment"></span> </div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span><span class="comment">/**</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span><span class="comment"> * Get the pool used by this shared memory segment.</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span><span class="comment"> */</span></div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span><a class="code hl_define" href="group__apr__pools.html#ga89ce1d55c7f0c39ea87c88eabd655394">APR_POOL_DECLARE_ACCESSOR</a>(shm);</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span><span class="comment"></span> </div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span><span class="comment">/** @} */</span> </div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> </div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span><span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span>}</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> </div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span><span class="preprocessor">#endif </span><span class="comment">/* APR_SHM_T */</span><span class="preprocessor"></span></div>
<div class="ttc" id="aapr_8h_html"><div class="ttname"><a href="apr_8h.html">apr.h</a></div><div class="ttdoc">APR Platform Definitions.</div></div>
<div class="ttc" id="aapr__errno_8h_html"><div class="ttname"><a href="apr__errno_8h.html">apr_errno.h</a></div><div class="ttdoc">APR Error Codes.</div></div>
<div class="ttc" id="aapr__perms__set_8h_html"><div class="ttname"><a href="apr__perms__set_8h.html">apr_perms_set.h</a></div><div class="ttdoc">APR Process Locking Routines.</div></div>
<div class="ttc" id="aapr__pools_8h_html"><div class="ttname"><a href="apr__pools_8h.html">apr_pools.h</a></div><div class="ttdoc">APR memory allocation.</div></div>
<div class="ttc" id="agroup__apr__errno_html_gaf76ee4543247e9fb3f3546203e590a6c"><div class="ttname"><a href="group__apr__errno.html#gaf76ee4543247e9fb3f3546203e590a6c">apr_status_t</a></div><div class="ttdeci">int apr_status_t</div><div class="ttdef"><b>Definition</b> apr_errno.h:44</div></div>
<div class="ttc" id="agroup__apr__platform_html_gad7b91b811a172bfa802603c2fb688f98"><div class="ttname"><a href="group__apr__platform.html#gad7b91b811a172bfa802603c2fb688f98">APR_DECLARE</a></div><div class="ttdeci">#define APR_DECLARE(type)</div><div class="ttdef"><b>Definition</b> apr.h:498</div></div>
<div class="ttc" id="agroup__apr__pools_html_ga89ce1d55c7f0c39ea87c88eabd655394"><div class="ttname"><a href="group__apr__pools.html#ga89ce1d55c7f0c39ea87c88eabd655394">APR_POOL_DECLARE_ACCESSOR</a></div><div class="ttdeci">#define APR_POOL_DECLARE_ACCESSOR(type)</div><div class="ttdef"><b>Definition</b> apr_pools.h:81</div></div>
<div class="ttc" id="agroup__apr__pools_html_gaf137f28edcf9a086cd6bc36c20d7cdfb"><div class="ttname"><a href="group__apr__pools.html#gaf137f28edcf9a086cd6bc36c20d7cdfb">apr_pool_t</a></div><div class="ttdeci">struct apr_pool_t apr_pool_t</div><div class="ttdef"><b>Definition</b> apr_pools.h:60</div></div>
<div class="ttc" id="agroup__apr__shm_html_ga088260723c96815610ff628f358d3630"><div class="ttname"><a href="group__apr__shm.html#ga088260723c96815610ff628f358d3630">apr_shm_attach_ex</a></div><div class="ttdeci">apr_status_t apr_shm_attach_ex(apr_shm_t **m, const char *filename, apr_pool_t *pool, apr_int32_t flags)</div></div>
<div class="ttc" id="agroup__apr__shm_html_ga0e542941c280cb72b78e30d452464759"><div class="ttname"><a href="group__apr__shm.html#ga0e542941c280cb72b78e30d452464759">apr_shm_attach</a></div><div class="ttdeci">apr_status_t apr_shm_attach(apr_shm_t **m, const char *filename, apr_pool_t *pool)</div></div>
<div class="ttc" id="agroup__apr__shm_html_ga21baaa66956641e06e072501f61882e7"><div class="ttname"><a href="group__apr__shm.html#ga21baaa66956641e06e072501f61882e7">apr_shm_create_ex</a></div><div class="ttdeci">apr_status_t apr_shm_create_ex(apr_shm_t **m, apr_size_t reqsize, const char *filename, apr_pool_t *pool, apr_int32_t flags)</div></div>
<div class="ttc" id="agroup__apr__shm_html_ga557ae85d3f225620a77ad80caeaacac7"><div class="ttname"><a href="group__apr__shm.html#ga557ae85d3f225620a77ad80caeaacac7">apr_shm_size_get</a></div><div class="ttdeci">apr_size_t apr_shm_size_get(const apr_shm_t *m)</div></div>
<div class="ttc" id="agroup__apr__shm_html_ga79e8c16bdeaf7ade4ef0f935249e7c2f"><div class="ttname"><a href="group__apr__shm.html#ga79e8c16bdeaf7ade4ef0f935249e7c2f">apr_shm_t</a></div><div class="ttdeci">struct apr_shm_t apr_shm_t</div><div class="ttdef"><b>Definition</b> apr_shm.h:44</div></div>
<div class="ttc" id="agroup__apr__shm_html_ga7de5b65a9c7d9840bfa289854f8d59d4"><div class="ttname"><a href="group__apr__shm.html#ga7de5b65a9c7d9840bfa289854f8d59d4">apr_shm_destroy</a></div><div class="ttdeci">apr_status_t apr_shm_destroy(apr_shm_t *m)</div></div>
<div class="ttc" id="agroup__apr__shm_html_ga900095a06d3fdb4cdd04ca4449a9d42a"><div class="ttname"><a href="group__apr__shm.html#ga900095a06d3fdb4cdd04ca4449a9d42a">apr_shm_detach</a></div><div class="ttdeci">apr_status_t apr_shm_detach(apr_shm_t *m)</div></div>
<div class="ttc" id="agroup__apr__shm_html_gab152ede0741aac78d34da3f55649553b"><div class="ttname"><a href="group__apr__shm.html#gab152ede0741aac78d34da3f55649553b">apr_shm_baseaddr_get</a></div><div class="ttdeci">void * apr_shm_baseaddr_get(const apr_shm_t *m)</div></div>
<div class="ttc" id="agroup__apr__shm_html_gab5399f04b93193bead435217f46087fd"><div class="ttname"><a href="group__apr__shm.html#gab5399f04b93193bead435217f46087fd">apr_shm_delete</a></div><div class="ttdeci">apr_status_t apr_shm_delete(apr_shm_t *m)</div></div>
<div class="ttc" id="agroup__apr__shm_html_gac370c4943c22505ce2b0d57c51805480"><div class="ttname"><a href="group__apr__shm.html#gac370c4943c22505ce2b0d57c51805480">apr_shm_create</a></div><div class="ttdeci">apr_status_t apr_shm_create(apr_shm_t **m, apr_size_t reqsize, const char *filename, apr_pool_t *pool)</div></div>
<div class="ttc" id="agroup__apr__shm_html_gaee8b7d9b952ff6157ddbb00fabb477e0"><div class="ttname"><a href="group__apr__shm.html#gaee8b7d9b952ff6157ddbb00fabb477e0">apr_shm_remove</a></div><div class="ttdeci">apr_status_t apr_shm_remove(const char *filename, apr_pool_t *pool)</div></div>
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