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+<hr><h1>smart_ptr.h</h1><a href="smart__ptr_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
+00007 <font class="comment">/* Copyright, 2000 Nevrax Ltd.</font>
+00008 <font class="comment"> *</font>
+00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
+00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
+00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
+00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
+00013 <font class="comment"> * any later version.</font>
+00014 <font class="comment"></font>
+00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
+00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
+00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
+00018 <font class="comment"> * General Public License for more details.</font>
+00019 <font class="comment"></font>
+00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
+00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
+00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
+00023 <font class="comment"> * MA 02111-1307, USA.</font>
+00024 <font class="comment"> */</font>
+00025
+00026 <font class="preprocessor">#ifndef NL_SMART_PTR_H</font>
+00027 <font class="preprocessor"></font><font class="preprocessor">#define NL_SMART_PTR_H</font>
+00028 <font class="preprocessor"></font>
+00029
+00030 <font class="preprocessor">#include "<a class="code" href="types__nl_8h.html">nel/misc/types_nl.h</a>"</font>
+00031
+00032 <font class="preprocessor">#include &lt;stdio.h&gt;</font>
+00033
+00034
+00035 <font class="keyword">namespace </font>NLMISC
+00036 {
+00037
+00038
+00039 <font class="comment">// ***************************************************************************</font>
+<a name="l00047"></a><a class="code" href="classNLMISC_1_1CRefCount.html">00047</a> <font class="comment"></font><font class="keyword">class </font>CRefCount
+00048 {
+00049 <font class="keyword">public</font>:
+00050 <font class="comment">// The instance handle.</font>
+00051 <font class="comment">// Can't put those to private since must be used by CRefPtr (and friend doesn't work with template).</font>
+<a name="l00052"></a><a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html">00052</a> <font class="keyword">struct </font><a class="code" href="classNLMISC_1_1CRefCount.html#l0">CPtrInfo</a>
+00053 {
+<a name="l00054"></a><a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m0">00054</a> <font class="keywordtype">void</font> *<a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m0">Ptr</a>; <font class="comment">// to know if the instance is valid.</font>
+<a name="l00055"></a><a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m1">00055</a> sint <a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m1">RefCount</a>; <font class="comment">// RefCount of ptrinfo (!= instance)</font>
+00056 <font class="comment">// For fu... dll problems, must use a flag to mark NullPtrInfo.</font>
+<a name="l00057"></a><a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m2">00057</a> <font class="keywordtype">bool</font> <a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m2">IsNullPtrInfo</a>;
+00058
+<a name="l00059"></a><a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#a0">00059</a> <a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#a0">CPtrInfo</a>(<font class="keywordtype">void</font> *p) {<a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m0">Ptr</a>=p; <a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m1">RefCount</a>=0; <a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m2">IsNullPtrInfo</a>=<font class="keyword">false</font>;}
+00060 <font class="comment">// Just for internal use, to mark our Null pointer.</font>
+<a name="l00061"></a><a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#a1">00061</a> <a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#a0">CPtrInfo</a>(<font class="keywordtype">char</font> ) {<a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m0">Ptr</a>=NULL; <a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m1">RefCount</a>=0x7FFFFFFF; <a class="code" href="structNLMISC_1_1CRefCount_1_1CPtrInfo.html#m2">IsNullPtrInfo</a>=<font class="keyword">true</font>;}
+00062 };
+00063
+00064 <font class="comment">// OWN null for ref ptr. (Optimisations!!!)</font>
+00065 <font class="keyword">static</font> <a class="code" href="classNLMISC_1_1CRefCount.html#l0">CPtrInfo</a> <a class="code" href="classNLMISC_1_1CRefCount.html#p0">NullPtrInfo</a>;
+<a name="l00066"></a><a class="code" href="classNLMISC_1_1CRefCount.html#l0">00066</a> <font class="keyword">friend</font> <font class="keyword">struct </font><a class="code" href="classNLMISC_1_1CRefCount.html#l0">CPtrInfo</a>;
+00067
+00068 <font class="keyword">public</font>:
+00069 <font class="comment">// Can't put this to private since must be used by CSmartPtr (and friend doesn't work with template).</font>
+00070 <font class="comment">// Provide incref()/decref() function doen't work since decref() can't do a delete this on a non virtual dtor.</font>
+00071 <font class="comment">// So Ptr gestion can only be used via CSmartPtr.</font>
+<a name="l00072"></a><a class="code" href="classNLMISC_1_1CRefCount.html#m0">00072</a> <font class="keyword">mutable</font> sint <a class="code" href="classNLMISC_1_1CRefCount.html#m0">crefs</a>; <font class="comment">// The ref counter for SmartPtr use.</font>
+<a name="l00073"></a><a class="code" href="classNLMISC_1_1CRefCount.html#m1">00073</a> <font class="keyword">mutable</font> <a class="code" href="classNLMISC_1_1CRefCount.html#l0">CPtrInfo</a> *<a class="code" href="classNLMISC_1_1CRefCount.html#m1">pinfo</a>; <font class="comment">// The ref ptr for RefPtr use.</font>
+00074
+00076 <a class="code" href="classNLMISC_1_1CRefCount.html#a0">~CRefCount</a>();
+<a name="l00078"></a><a class="code" href="classNLMISC_1_1CRefCount.html#a1">00078</a> <a class="code" href="classNLMISC_1_1CRefCount.html#a1">CRefCount</a>() { <a class="code" href="classNLMISC_1_1CRefCount.html#m0">crefs</a> = 0; pinfo=&amp;NullPtrInfo; }
+<a name="l00080"></a><a class="code" href="classNLMISC_1_1CRefCount.html#a2">00080</a> <a class="code" href="classNLMISC_1_1CRefCount.html#a1">CRefCount</a> &amp;<a class="code" href="classNLMISC_1_1CRefCount.html#a2">operator=</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CRefCount.html#a1">CRefCount</a> &amp;) {<font class="keywordflow">return</font> *<font class="keyword">this</font>;}
+<a name="l00082"></a><a class="code" href="classNLMISC_1_1CRefCount.html#a3">00082</a> <a class="code" href="classNLMISC_1_1CRefCount.html#a1">CRefCount</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CRefCount.html#a1">CRefCount</a> &amp;) {<a class="code" href="classNLMISC_1_1CRefCount.html#m0">crefs</a> = 0; pinfo=&amp;NullPtrInfo;}
+00083 };
+00084
+00085
+00086
+00087 <font class="comment">// ***************************************************************************</font>
+00088 <font class="comment">// For debug only.</font>
+<a name="l00089"></a><a class="code" href="smart__ptr_8h.html#a0">00089</a> <font class="preprocessor">#define SMART_TRACE(_s) ((void)0)</font>
+<a name="l00090"></a><a class="code" href="smart__ptr_8h.html#a1">00090</a> <font class="preprocessor"></font><font class="preprocessor">#define REF_TRACE(_s) ((void)0)</font>
+00091 <font class="preprocessor"></font><font class="comment">//#define SMART_TRACE(_s) printf("%s: %d \n", _s, Ptr?Ptr-&gt;crefs:0)</font>
+00092 <font class="comment">//#define REF_TRACE(_s) printf("%s: %d \n", _s, pinfo!=&amp;CRefCount::NullPtrInfo?pinfo-&gt;RefCount:0)</font>
+00093
+00094
+00177 <font class="keyword">template</font> &lt;<font class="keyword">class</font> T&gt;
+<a name="l00178"></a><a class="code" href="classNLMISC_1_1CSmartPtr.html">00178</a> <font class="keyword">class </font>CSmartPtr
+00179 {
+<a name="l00180"></a><a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">00180</a> T* <a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>;
+00181 <font class="keyword">public</font>:
+00182
+<a name="l00184"></a><a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">00184</a> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a>() { <a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>=NULL; <a class="code" href="smart__ptr_8h.html#a0">SMART_TRACE</a>(<font class="stringliteral">"ctor()"</font>); }
+<a name="l00186"></a><a class="code" href="classNLMISC_1_1CSmartPtr.html#a1">00186</a> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a>(T* p) { <a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>=p; <font class="keywordflow">if</font>(Ptr) <a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>-&gt;crefs++; <a class="code" href="smart__ptr_8h.html#a0">SMART_TRACE</a>(<font class="stringliteral">"ctor(T*)"</font>); }
+<a name="l00188"></a><a class="code" href="classNLMISC_1_1CSmartPtr.html#a2">00188</a> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a> &amp;copy) { <a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>=copy.Ptr; <font class="keywordflow">if</font>(Ptr) <a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>-&gt;crefs++; <a class="code" href="smart__ptr_8h.html#a0">SMART_TRACE</a>(<font class="stringliteral">"ctor(Copy)"</font>); }
+00190 <a class="code" href="classNLMISC_1_1CSmartPtr.html#a3">~CSmartPtr</a>();
+00191
+00192
+<a name="l00194"></a><a class="code" href="classNLMISC_1_1CSmartPtr.html#a4">00194</a> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a4">operator T*</a>(<font class="keywordtype">void</font>)<font class="keyword"> const </font>{ <a class="code" href="smart__ptr_8h.html#a0">SMART_TRACE</a>(<font class="stringliteral">"castT*()"</font>); <font class="keywordflow">return</font> <a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>; }
+<a name="l00196"></a><a class="code" href="classNLMISC_1_1CSmartPtr.html#a5">00196</a> T&amp; <a class="code" href="classNLMISC_1_1CSmartPtr.html#a5">operator*</a>(<font class="keywordtype">void</font>)<font class="keyword"> const </font>{ <a class="code" href="smart__ptr_8h.html#a0">SMART_TRACE</a>(<font class="stringliteral">"ope*()"</font>); <font class="keywordflow">return</font> *<a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>; }
+<a name="l00198"></a><a class="code" href="classNLMISC_1_1CSmartPtr.html#a6">00198</a> T* <a class="code" href="classNLMISC_1_1CSmartPtr.html#a6">operator-&gt;</a>(<font class="keywordtype">void</font>)<font class="keyword"> const </font>{ <a class="code" href="smart__ptr_8h.html#a0">SMART_TRACE</a>(<font class="stringliteral">"ope-&gt;()"</font>); <font class="keywordflow">return</font> <a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>; }
+00199
+00201 <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a>&amp; <a class="code" href="classNLMISC_1_1CSmartPtr.html#a7">operator=</a>(T* p);
+00203 <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a>&amp; <a class="code" href="classNLMISC_1_1CSmartPtr.html#a7">operator=</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a> &amp;p);
+00205 <font class="keywordtype">bool</font> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a9">operator&lt;</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a> &amp;p) <font class="keyword">const</font>;
+00206
+<a name="l00207"></a><a class="code" href="classNLMISC_1_1CSmartPtr.html#a10">00207</a> sint <a class="code" href="classNLMISC_1_1CSmartPtr.html#a10">getNbRef</a>() { <font class="keywordflow">if</font>(Ptr) <font class="keywordflow">return</font> <a class="code" href="classNLMISC_1_1CSmartPtr.html#o0">Ptr</a>-&gt;crefs; <font class="keywordflow">else</font> <font class="keywordflow">return</font> 0; }
+00208 <font class="comment">// No need to do any operator==. Leave the work to cast operator T*(void).</font>
+00209 };
+00210
+00211
+00212
+00213 <font class="comment">// ***************************************************************************</font>
+00243 <font class="comment"></font><font class="keyword">template</font> &lt;<font class="keyword">class</font> T&gt;
+<a name="l00244"></a><a class="code" href="classNLMISC_1_1CRefPtr.html">00244</a> <font class="keyword">class </font>CRefPtr
+00245 {
+00246 <font class="keyword">private</font>:
+<a name="l00247"></a><a class="code" href="classNLMISC_1_1CRefPtr.html#o0">00247</a> CRefCount::CPtrInfo *<a class="code" href="classNLMISC_1_1CRefPtr.html#o0">pinfo</a>; <font class="comment">// A ptr to the handle of the object.</font>
+<a name="l00248"></a><a class="code" href="classNLMISC_1_1CRefPtr.html#o1">00248</a> <font class="keyword">mutable</font> T *<a class="code" href="classNLMISC_1_1CRefPtr.html#o1">Ptr</a>; <font class="comment">// A cache for pinfo-&gt;Ptr. UseFull to speed up ope-&gt;() and ope*()</font>
+00249
+00250 <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CRefPtr.html#c0">unRef</a>() <font class="keyword">const</font>; <font class="comment">// Just release the handle pinfo, but do not update pinfo/Ptr, if deleted.</font>
+00251
+00252 <font class="keyword">public</font>:
+00253
+00255 <a class="code" href="classNLMISC_1_1CRefPtr.html#a0">CRefPtr</a>();
+00257 <a class="code" href="classNLMISC_1_1CRefPtr.html#a0">CRefPtr</a>(T *<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>);
+00259 <a class="code" href="classNLMISC_1_1CRefPtr.html#a0">CRefPtr</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CRefPtr.html#a0">CRefPtr</a> &amp;copy);
+00261 <a class="code" href="classNLMISC_1_1CRefPtr.html#a3">~CRefPtr</a>(<font class="keywordtype">void</font>);
+00262
+00263
+00265 <a class="code" href="classNLMISC_1_1CRefPtr.html#a4">operator T*</a>() <font class="keyword">const</font>;
+00267 T&amp; <a class="code" href="classNLMISC_1_1CRefPtr.html#a5">operator*</a>(<font class="keywordtype">void</font>) <font class="keyword">const</font>;
+00269 T* <a class="code" href="classNLMISC_1_1CRefPtr.html#a6">operator-&gt;</a>(<font class="keywordtype">void</font>) <font class="keyword">const</font>;
+00270
+00271
+00273 <a class="code" href="classNLMISC_1_1CRefPtr.html#a0">CRefPtr</a>&amp; <a class="code" href="classNLMISC_1_1CRefPtr.html#a7">operator=</a>(T *<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>);
+00275 <a class="code" href="classNLMISC_1_1CRefPtr.html#a0">CRefPtr</a>&amp; <a class="code" href="classNLMISC_1_1CRefPtr.html#a7">operator=</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CRefPtr.html#a0">CRefPtr</a> &amp;copy);
+00276
+00277
+00285 <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CRefPtr.html#a9">kill</a>();
+00286
+00287
+00288 <font class="comment">// No need to do any operator==. Leave the work to cast operator T*(void).</font>
+00289 };
+00290
+00291
+00292
+00293 }
+00294
+00295
+00296 <font class="comment">// ***************************************************************************</font>
+00297 <font class="comment">// ***************************************************************************</font>
+00298 <font class="comment">// Implementation.</font>
+00299 <font class="comment">// ***************************************************************************</font>
+00300 <font class="comment">// ***************************************************************************</font>
+00301
+00302
+00303 <font class="preprocessor">#include "<a class="code" href="smart__ptr__inline_8h.html">smart_ptr_inline.h</a>"</font>
+00304 <font class="preprocessor">#undef SMART_TRACE</font>
+00305 <font class="preprocessor"></font><font class="preprocessor">#undef REF_TRACE</font>
+00306 <font class="preprocessor"></font>
+00307
+00308
+00309 <font class="preprocessor">#endif // NL_SMART_PTR_H</font>
+00310 <font class="preprocessor"></font>
+00311 <font class="comment">/* End of smart_ptr.h */</font>
+</pre></div>
+
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