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<div class="title">CEGUIRefCounted.h</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> filename: CEGUIRefCounted.h</span>
<a name="l00003"></a>00003 <span class="comment"> created: Wed Mar 1 2006</span>
<a name="l00004"></a>00004 <span class="comment"> author: Paul D Turner <paul@cegui.org.uk></span>
<a name="l00005"></a>00005 <span class="comment">*************************************************************************/</span>
<a name="l00006"></a>00006 <span class="comment">/***************************************************************************</span>
<a name="l00007"></a>00007 <span class="comment"> * Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining</span>
<a name="l00010"></a>00010 <span class="comment"> * a copy of this software and associated documentation files (the</span>
<a name="l00011"></a>00011 <span class="comment"> * "Software"), to deal in the Software without restriction, including</span>
<a name="l00012"></a>00012 <span class="comment"> * without limitation the rights to use, copy, modify, merge, publish,</span>
<a name="l00013"></a>00013 <span class="comment"> * distribute, sublicense, and/or sell copies of the Software, and to</span>
<a name="l00014"></a>00014 <span class="comment"> * permit persons to whom the Software is furnished to do so, subject to</span>
<a name="l00015"></a>00015 <span class="comment"> * the following conditions:</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> * The above copyright notice and this permission notice shall be</span>
<a name="l00018"></a>00018 <span class="comment"> * included in all copies or substantial portions of the Software.</span>
<a name="l00019"></a>00019 <span class="comment"> *</span>
<a name="l00020"></a>00020 <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span>
<a name="l00021"></a>00021 <span class="comment"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span>
<a name="l00022"></a>00022 <span class="comment"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.</span>
<a name="l00023"></a>00023 <span class="comment"> * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR</span>
<a name="l00024"></a>00024 <span class="comment"> * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,</span>
<a name="l00025"></a>00025 <span class="comment"> * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR</span>
<a name="l00026"></a>00026 <span class="comment"> * OTHER DEALINGS IN THE SOFTWARE.</span>
<a name="l00027"></a>00027 <span class="comment"> ***************************************************************************/</span>
<a name="l00028"></a>00028 <span class="preprocessor">#ifndef _CEGUIRefCounted_h_</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define _CEGUIRefCounted_h_</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="comment">// Start of CEGUI namespace section</span>
<a name="l00032"></a>00032 <span class="keyword">namespace </span>CEGUI
<a name="l00033"></a>00033 {
<a name="l00039"></a>00039 <span class="keyword">template</span><<span class="keyword">typename</span> T>
<a name="l00040"></a><a class="code" href="classCEGUI_1_1RefCounted.html">00040</a> <span class="keyword">class </span><a class="code" href="classCEGUI_1_1RefCounted.html" title="Simple, generic, reference counted pointer class. This is primarily here for use by the Events system...">RefCounted</a>
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 <span class="keyword">public</span>:
<a name="l00047"></a><a class="code" href="classCEGUI_1_1RefCounted.html#a664d68f4e0a39c965fb4e46e2d8ce375">00047</a> <a class="code" href="classCEGUI_1_1RefCounted.html#a664d68f4e0a39c965fb4e46e2d8ce375" title="Default constructor.">RefCounted</a>() :
<a name="l00048"></a>00048 d_object(0),
<a name="l00049"></a>00049 d_count(0)
<a name="l00050"></a>00050 {
<a name="l00051"></a>00051 }
<a name="l00052"></a>00052
<a name="l00057"></a><a class="code" href="classCEGUI_1_1RefCounted.html#a5f5881233aae2fe27e628c9ee1c93c11">00057</a> <a class="code" href="classCEGUI_1_1RefCounted.html#a664d68f4e0a39c965fb4e46e2d8ce375" title="Default constructor.">RefCounted</a>(T* ob) :
<a name="l00058"></a>00058 d_object(ob),
<a name="l00059"></a>00059 d_count((ob != 0) ? new unsigned int(1) : 0)
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062
<a name="l00067"></a><a class="code" href="classCEGUI_1_1RefCounted.html#a85858524729804a9251574156e780608">00067</a> <a class="code" href="classCEGUI_1_1RefCounted.html#a664d68f4e0a39c965fb4e46e2d8ce375" title="Default constructor.">RefCounted</a>(<span class="keyword">const</span> <a class="code" href="classCEGUI_1_1RefCounted.html" title="Simple, generic, reference counted pointer class. This is primarily here for use by the Events system...">RefCounted<T></a>& other) :
<a name="l00068"></a>00068 d_object(other.d_object),
<a name="l00069"></a>00069 d_count(other.d_count)
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 <span class="keywordflow">if</span> (d_count)
<a name="l00072"></a>00072 addRef();
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00080"></a><a class="code" href="classCEGUI_1_1RefCounted.html#a772f4e55e704f830d205de111a8f78bb">00080</a> <a class="code" href="classCEGUI_1_1RefCounted.html#a772f4e55e704f830d205de111a8f78bb" title="Destructor. Only deletes the associated object if no further references exist.">~RefCounted</a>()
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 <span class="keywordflow">if</span> (d_object)
<a name="l00083"></a>00083 release();
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00092"></a><a class="code" href="classCEGUI_1_1RefCounted.html#a5b93a782767966d1202580dcb508861e">00092</a> <a class="code" href="classCEGUI_1_1RefCounted.html" title="Simple, generic, reference counted pointer class. This is primarily here for use by the Events system...">RefCounted<T></a>& <a class="code" href="classCEGUI_1_1RefCounted.html#a5b93a782767966d1202580dcb508861e" title="Assignment operator. Previously held object gets its reference count reduced, and is deleted if no fu...">operator=</a>(<span class="keyword">const</span> <a class="code" href="classCEGUI_1_1RefCounted.html" title="Simple, generic, reference counted pointer class. This is primarily here for use by the Events system...">RefCounted<T></a>& other)
<a name="l00093"></a>00093 {
<a name="l00094"></a>00094 <span class="keywordflow">if</span> (*<span class="keyword">this</span> != other)
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 <span class="keywordflow">if</span> (d_object)
<a name="l00097"></a>00097 release();
<a name="l00098"></a>00098
<a name="l00099"></a>00099 d_object = other.d_object;
<a name="l00100"></a>00100 d_count = d_object ? other.d_count : 0;
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="keywordflow">if</span> (d_count)
<a name="l00103"></a>00103 addRef();
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
<a name="l00107"></a>00107 }
<a name="l00108"></a>00108
<a name="l00114"></a><a class="code" href="classCEGUI_1_1RefCounted.html#a04aa4f94c1b33b03c730ae36a82f189f">00114</a> <span class="keywordtype">bool</span> <a class="code" href="classCEGUI_1_1RefCounted.html#a04aa4f94c1b33b03c730ae36a82f189f" title="Return whether the two RefCounted ptrs are equal (point to the same object)">operator==</a>(<span class="keyword">const</span> <a class="code" href="classCEGUI_1_1RefCounted.html" title="Simple, generic, reference counted pointer class. This is primarily here for use by the Events system...">RefCounted<T></a>& other)<span class="keyword"> const</span>
<a name="l00115"></a>00115 <span class="keyword"> </span>{
<a name="l00116"></a>00116 <span class="keywordflow">return</span> d_object == other.d_object;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118
<a name="l00124"></a><a class="code" href="classCEGUI_1_1RefCounted.html#a15e3f35f3b53229300718b5620912b71">00124</a> <span class="keywordtype">bool</span> <a class="code" href="classCEGUI_1_1RefCounted.html#a15e3f35f3b53229300718b5620912b71" title="Return whether the two RefCounted ptrs are not equal (point to different objects)">operator!=</a>(<span class="keyword">const</span> <a class="code" href="classCEGUI_1_1RefCounted.html" title="Simple, generic, reference counted pointer class. This is primarily here for use by the Events system...">RefCounted<T></a>& other)<span class="keyword"> const</span>
<a name="l00125"></a>00125 <span class="keyword"> </span>{
<a name="l00126"></a>00126 <span class="keywordflow">return</span> d_object != other.d_object;
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128
<a name="l00134"></a><a class="code" href="classCEGUI_1_1RefCounted.html#a395b96fc408f0dd924affe8f3c7f50ce">00134</a> <span class="keyword">const</span> T& <a class="code" href="classCEGUI_1_1RefCounted.html#a395b96fc408f0dd924affe8f3c7f50ce" title="Return the object referred to by the wrapped pointer. (beware of null pointers when using this!)...">operator*</a>()<span class="keyword"> const</span>
<a name="l00135"></a>00135 <span class="keyword"> </span>{
<a name="l00136"></a>00136 <span class="keywordflow">return</span> *d_object;
<a name="l00137"></a>00137 }
<a name="l00138"></a>00138
<a name="l00139"></a>00139 T& <a class="code" href="classCEGUI_1_1RefCounted.html#a395b96fc408f0dd924affe8f3c7f50ce" title="Return the object referred to by the wrapped pointer. (beware of null pointers when using this!)...">operator*</a>()
<a name="l00140"></a>00140 {
<a name="l00141"></a>00141 <span class="keywordflow">return</span> *d_object;
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143
<a name="l00148"></a><a class="code" href="classCEGUI_1_1RefCounted.html#a52d6c40348cb2c43309871b8ad51cdd1">00148</a> <span class="keyword">const</span> T* <a class="code" href="classCEGUI_1_1RefCounted.html#a52d6c40348cb2c43309871b8ad51cdd1" title="Return the wrapped pointer.">operator-></a>()<span class="keyword"> const</span>
<a name="l00149"></a>00149 <span class="keyword"> </span>{
<a name="l00150"></a>00150 <span class="keywordflow">return</span> d_object;
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152
<a name="l00153"></a>00153 T* <a class="code" href="classCEGUI_1_1RefCounted.html#a52d6c40348cb2c43309871b8ad51cdd1" title="Return the wrapped pointer.">operator-></a>()
<a name="l00154"></a>00154 {
<a name="l00155"></a>00155 <span class="keywordflow">return</span> d_object;
<a name="l00156"></a>00156 }
<a name="l00157"></a>00157
<a name="l00162"></a><a class="code" href="classCEGUI_1_1RefCounted.html#aabe30992b214886b7f5960ec6f293e8c">00162</a> <span class="keywordtype">bool</span> <a class="code" href="classCEGUI_1_1RefCounted.html#aabe30992b214886b7f5960ec6f293e8c" title="Return whether the wrapped pointer is valid. i.e. that it is not null.">isValid</a>()<span class="keyword"> const</span>
<a name="l00163"></a>00163 <span class="keyword"> </span>{
<a name="l00164"></a>00164 <span class="keywordflow">return</span> d_object != 0;
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="keyword">private</span>:
<a name="l00172"></a>00172 <span class="keywordtype">void</span> addRef()
<a name="l00173"></a>00173 {
<a name="l00174"></a>00174 ++*d_count;
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00182"></a>00182 <span class="keywordtype">void</span> release()
<a name="l00183"></a>00183 {
<a name="l00184"></a>00184 <span class="keywordflow">if</span> (!--*d_count)
<a name="l00185"></a>00185 {
<a name="l00186"></a>00186 <span class="keyword">delete</span> d_object;
<a name="l00187"></a>00187 <span class="keyword">delete</span> d_count;
<a name="l00188"></a>00188 d_object = 0;
<a name="l00189"></a>00189 d_count = 0;
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191 }
<a name="l00192"></a>00192
<a name="l00193"></a>00193 T* d_object;
<a name="l00194"></a>00194 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>* d_count;
<a name="l00195"></a>00195 };
<a name="l00196"></a>00196
<a name="l00197"></a>00197 } <span class="comment">// End of CEGUI namespace section</span>
<a name="l00198"></a>00198
<a name="l00199"></a>00199 <span class="preprocessor">#endif // end of guard _CEGUIRefCounted_h_</span>
</pre></div></div>
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