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doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<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 <stdio.h></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=&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> &<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> &) {<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> &) {<a class="code" href="classNLMISC_1_1CRefCount.html#m0">crefs</a> = 0; pinfo=&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->crefs:0)</font> +00092 <font class="comment">//#define REF_TRACE(_s) printf("%s: %d \n", _s, pinfo!=&CRefCount::NullPtrInfo?pinfo->RefCount:0)</font> +00093 +00094 +00177 <font class="keyword">template</font> <<font class="keyword">class</font> T> +<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>->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> &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>->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& <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-></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>; } +00199 +00201 <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a>& <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>& <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> &p); +00205 <font class="keywordtype">bool</font> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a9">operator<</a>(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CSmartPtr.html#a0">CSmartPtr</a> &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>->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> <<font class="keyword">class</font> T> +<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->Ptr. UseFull to speed up ope->() 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> &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& <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-></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>& <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>& <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> &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> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |