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<div class="title">singletonref.hxx</div> </div>
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<a href="a00417.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">/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */</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"> * This file is part of the LibreOffice project.</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 Source Code Form is subject to the terms of the Mozilla Public</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * License, v. 2.0. If a copy of the MPL was not distributed with this</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * file, You can obtain one at http://mozilla.org/MPL/2.0/.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * This file incorporates work covered by the following license notice:</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * contributor license agreements. See the NOTICE file distributed</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * with this work for additional information regarding copyright</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * ownership. The ASF licenses this file to you under the Apache</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * License, Version 2.0 (the "License"); you may not use this file</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * except in compliance with the License. You may obtain a copy of</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * the License at http://www.apache.org/licenses/LICENSE-2.0 .</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> </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#ifndef INCLUDED_SALHELPER_SINGLETONREF_HXX</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor"></span><span class="preprocessor">#define INCLUDED_SALHELPER_SINGLETONREF_HXX</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "<a class="code" href="a00402.html">sal/config.h</a>"</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <cstddef></span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "<a class="code" href="a00349.html">osl/mutex.hxx</a>"</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include "<a class="code" href="a00375.html">rtl/instance.hxx</a>"</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "<a class="code" href="a00339.html">osl/diagnose.h</a>"</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "<a class="code" href="a00344.html">osl/getglobalmutex.hxx</a>"</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</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="keyword">namespace </span>salhelper{</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">template</span>< <span class="keyword">class</span> SingletonClass ></div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="a00184.html"> 69</a></span> <span class="keyword">class </span><a class="code" href="a00184.html">SingletonRef</a></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> </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">// member</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keyword">private</span>:</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">static</span> SingletonClass* m_pInstance;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">static</span> sal_Int32 m_nRef;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</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">// interface</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="keyword">public</span>:</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> </div>
<div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="a00184.html#abfddda6d3cd15061b3c98efe041901c2"> 95</a></span>  <a class="code" href="a00184.html#abfddda6d3cd15061b3c98efe041901c2">SingletonRef</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="comment">// GLOBAL SAFE -></span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="a00094.html">::osl::MutexGuard</a> aLock(SingletonRef::ownStaticLock());</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">// must be increased before(!) the check is done.</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">// Otherwise this check can fail inside the same thread ...</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  ++m_nRef;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">if</span> (m_nRef == 1)</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  m_pInstance = <span class="keyword">new</span> SingletonClass();</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <a class="code" href="a00459.html#gaf7eb77b3e4f6587a6e80db114eb4e810">OSL_ENSURE</a>(m_nRef>0 && m_pInstance, <span class="stringliteral">"Race? Ref count of singleton >0, but instance is NULL!"</span>);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">// <- GLOBAL SAFE</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div>
<div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="a00184.html#a182df1b4804b728950179d5a14636b88"> 118</a></span>  <a class="code" href="a00184.html#a182df1b4804b728950179d5a14636b88">~SingletonRef</a>()</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  {</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="comment">// GLOBAL SAFE -></span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <a class="code" href="a00094.html">::osl::MutexGuard</a> aLock(SingletonRef::ownStaticLock());</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="comment">// must be decreased before(!) the check is done.</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="comment">// Otherwise this check can fail inside the same thread ...</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  --m_nRef;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">if</span> (m_nRef == 0)</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  {</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">delete</span> m_pInstance;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  m_pInstance = NULL;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">// <- GLOBAL SAFE</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="preprocessor">#if defined LIBO_INTERNAL_ONLY</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="preprocessor"></span> <a class="code" href="a00184.html">SingletonRef</a> & operator =(<a class="code" href="a00184.html">SingletonRef</a> <span class="keyword">const</span> &) = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00140"></a><span class="lineno"><a class="line" href="a00184.html#a6580b80a2eb1a5d8ce2378ea808cdcd6"> 140</a></span>  SingletonClass* <a class="code" href="a00184.html#a6580b80a2eb1a5d8ce2378ea808cdcd6">operator-></a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="keyword"> </span>{</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="comment">// GLOBAL SAFE -></span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <a class="code" href="a00094.html">::osl::MutexGuard</a> aLock(SingletonRef::ownStaticLock());</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">return</span> m_pInstance;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="comment">// <- GLOBAL SAFE</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  }</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div>
<div class="line"><a name="l00151"></a><span class="lineno"><a class="line" href="a00184.html#a5e03942e6d1a5faa7ec5ce7b16610197"> 151</a></span>  SingletonClass& <a class="code" href="a00184.html#a5e03942e6d1a5faa7ec5ce7b16610197">operator*</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="keyword"> </span>{</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// GLOBAL SAFE -></span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <a class="code" href="a00094.html">::osl::MutexGuard</a> aLock(SingletonRef::ownStaticLock());</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">return</span> *m_pInstance;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="comment">// <- GLOBAL SAFE</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  }</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="comment">// helper</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>  <span class="keyword">private</span>:</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <a class="code" href="a00184.html#abfddda6d3cd15061b3c98efe041901c2">SingletonRef</a>(<a class="code" href="a00184.html">SingletonRef</a> &) <a class="code" href="a00409.html#a1f708c2b11d04207c54202e980f9e181">SAL_DELETED_FUNCTION</a>;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  struct SingletonLockInit</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <a class="code" href="a00130.html">::osl::Mutex</a>* operator()()</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  {</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  static ::osl::Mutex aInstance;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">return</span> &aInstance;</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  };</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <a class="code" href="a00130.html">::osl::Mutex</a>& ownStaticLock()<span class="keyword"> const</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="keyword"> </span>{</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">return</span> *rtl_Instance< <a class="code" href="a00130.html">::osl::Mutex</a>,</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  SingletonLockInit,</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <a class="code" href="a00453.html#a79aaaf4cd921a2a28d75d96ae760095c">::osl::MutexGuard</a>,</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <a class="code" href="a00093.html">::osl::GetGlobalMutex</a> >::create(SingletonLockInit(), ::<a class="code" href="a00093.html">osl::GetGlobalMutex</a>());</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  }</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> };</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="keyword">template</span>< <span class="keyword">class</span> SingletonClass ></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> SingletonClass* SingletonRef< SingletonClass >::m_pInstance = NULL;</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="keyword">template</span>< <span class="keyword">class</span> SingletonClass ></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> sal_Int32 SingletonRef< SingletonClass >::m_nRef = 0;</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> } <span class="comment">// namespace salhelper</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> </div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="preprocessor">#endif // INCLUDED_SALHELPER_SINGLETONREF_HXX</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment">/* vim:set shiftwidth=4 softtabstop=4 expandtab: */</span></div>
<div class="ttc" id="a00093_html"><div class="ttname"><a href="a00093.html">osl::GetGlobalMutex</a></div><div class="ttdoc">A helper functor for the rtl_Instance template. </div><div class="ttdef"><b>Definition:</b> getglobalmutex.hxx:31</div></div>
<div class="ttc" id="a00339_html"><div class="ttname"><a href="a00339.html">diagnose.h</a></div><div class="ttdoc">Provides simple diagnostic support. </div></div>
<div class="ttc" id="a00344_html"><div class="ttname"><a href="a00344.html">getglobalmutex.hxx</a></div></div>
<div class="ttc" id="a00130_html"><div class="ttname"><a href="a00130.html">osl::Mutex</a></div><div class="ttdoc">A mutual exclusion synchronization object. </div><div class="ttdef"><b>Definition:</b> mutex.hxx:31</div></div>
<div class="ttc" id="a00184_html_abfddda6d3cd15061b3c98efe041901c2"><div class="ttname"><a href="a00184.html#abfddda6d3cd15061b3c98efe041901c2">salhelper::SingletonRef::SingletonRef</a></div><div class="ttdeci">SingletonRef()</div><div class="ttdoc">standard ctor. </div><div class="ttdef"><b>Definition:</b> singletonref.hxx:95</div></div>
<div class="ttc" id="a00459_html_gaf7eb77b3e4f6587a6e80db114eb4e810"><div class="ttname"><a href="a00459.html#gaf7eb77b3e4f6587a6e80db114eb4e810">OSL_ENSURE</a></div><div class="ttdeci">#define OSL_ENSURE(c, m)</div><div class="ttdoc">If cond is false, reports an error with message msg. </div><div class="ttdef"><b>Definition:</b> diagnose.h:84</div></div>
<div class="ttc" id="a00184_html"><div class="ttname"><a href="a00184.html">salhelper::SingletonRef</a></div><div class="ttdoc">template for implementing singleton classes. </div><div class="ttdef"><b>Definition:</b> singletonref.hxx:69</div></div>
<div class="ttc" id="a00375_html"><div class="ttname"><a href="a00375.html">instance.hxx</a></div></div>
<div class="ttc" id="a00453_html_a79aaaf4cd921a2a28d75d96ae760095c"><div class="ttname"><a href="a00453.html#a79aaaf4cd921a2a28d75d96ae760095c">osl::MutexGuard</a></div><div class="ttdeci">Guard< Mutex > MutexGuard</div><div class="ttdef"><b>Definition:</b> mutex.hxx:246</div></div>
<div class="ttc" id="a00349_html"><div class="ttname"><a href="a00349.html">mutex.hxx</a></div></div>
<div class="ttc" id="a00184_html_a5e03942e6d1a5faa7ec5ce7b16610197"><div class="ttname"><a href="a00184.html#a5e03942e6d1a5faa7ec5ce7b16610197">salhelper::SingletonRef::operator*</a></div><div class="ttdeci">SingletonClass & operator*() const </div><div class="ttdoc">Allows (*rSingle).someBodyOp(). </div><div class="ttdef"><b>Definition:</b> singletonref.hxx:151</div></div>
<div class="ttc" id="a00184_html_a182df1b4804b728950179d5a14636b88"><div class="ttname"><a href="a00184.html#a182df1b4804b728950179d5a14636b88">salhelper::SingletonRef::~SingletonRef</a></div><div class="ttdeci">~SingletonRef()</div><div class="ttdoc">standard dtor. </div><div class="ttdef"><b>Definition:</b> singletonref.hxx:118</div></div>
<div class="ttc" id="a00184_html_a6580b80a2eb1a5d8ce2378ea808cdcd6"><div class="ttname"><a href="a00184.html#a6580b80a2eb1a5d8ce2378ea808cdcd6">salhelper::SingletonRef::operator-></a></div><div class="ttdeci">SingletonClass * operator->() const </div><div class="ttdoc">Allows rSingle-&gt;someBodyOp(). </div><div class="ttdef"><b>Definition:</b> singletonref.hxx:140</div></div>
<div class="ttc" id="a00094_html"><div class="ttname"><a href="a00094.html">osl::Guard</a></div><div class="ttdoc">Object lifetime scoped mutex object or interface lock. </div><div class="ttdef"><b>Definition:</b> mutex.hxx:114</div></div>
<div class="ttc" id="a00402_html"><div class="ttname"><a href="a00402.html">config.h</a></div></div>
<div class="ttc" id="a00409_html_a1f708c2b11d04207c54202e980f9e181"><div class="ttname"><a href="a00409.html#a1f708c2b11d04207c54202e980f9e181">SAL_DELETED_FUNCTION</a></div><div class="ttdeci">#define SAL_DELETED_FUNCTION</div><div class="ttdoc">short-circuit extra-verbose API namespaces </div><div class="ttdef"><b>Definition:</b> types.h:396</div></div>
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