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<hr><h1>mutex.h</h1><a href="mutex_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
00008 <font class="comment">/* Copyright, 2000 Nevrax Ltd.</font>
00009 <font class="comment"> *</font>
00010 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00011 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00012 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00013 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00014 <font class="comment"> * any later version.</font>
00015 <font class="comment"></font>
00016 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00017 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00018 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00019 <font class="comment"> * General Public License for more details.</font>
00020 <font class="comment"></font>
00021 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00022 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00023 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00024 <font class="comment"> * MA 02111-1307, USA.</font>
00025 <font class="comment"> */</font>
00026
00027 <font class="preprocessor">#ifndef NL_MUTEX_H</font>
00028 <font class="preprocessor"></font><font class="preprocessor">#define NL_MUTEX_H</font>
00029 <font class="preprocessor"></font>
00030 <font class="preprocessor">#include "<a class="code" href="types__nl_8h.html">nel/misc/types_nl.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="time__nl_8h.html">nel/misc/time_nl.h</a>"</font>
00032 <font class="preprocessor">#include <map></font>
00033
00034 <font class="preprocessor">#ifdef NL_OS_UNIX</font>
00035 <font class="preprocessor"></font><font class="preprocessor">#include <pthread.h></font>
00036 <font class="preprocessor">#include <semaphore.h></font>
00037 <font class="preprocessor">#endif</font>
00038 <font class="preprocessor"></font>
00039 <font class="preprocessor">#undef MUTEX_DEBUG</font>
00040 <font class="preprocessor"></font>
00041
00042 <font class="keyword">namespace </font>NLMISC {
00043
00044 <font class="comment">// By default, all mutex use the CFairMutex class to avoid freeze problem.</font>
<a name="l00045"></a><a class="code" href="mutex_8h.html#a0">00045</a> <font class="preprocessor">#define CMutex CFairMutex</font>
00046 <font class="preprocessor"></font>
<a name="l00064"></a><a class="code" href="classNLMISC_1_1CUnfairMutex.html">00064</a> <font class="keyword">class </font>CUnfairMutex
00065 {
00066 <font class="keyword">public</font>:
00067
00069 <a class="code" href="classNLMISC_1_1CUnfairMutex.html#a0">CUnfairMutex</a>();
00070 <a class="code" href="classNLMISC_1_1CUnfairMutex.html#a0">CUnfairMutex</a>(<font class="keyword">const</font> std::string &name);
00071
00073 <a class="code" href="classNLMISC_1_1CUnfairMutex.html#a2">~CUnfairMutex</a>();
00074
00075 <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CUnfairMutex.html#a3">enter</a> ();
00076 <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CUnfairMutex.html#a4">leave</a> ();
00077
00078 <font class="keyword">private</font>:
00079
00080 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00081 <font class="preprocessor"></font> <font class="keywordtype">void</font> *Mutex;
00082 <font class="preprocessor">#elif defined NL_OS_UNIX</font>
00083 <font class="preprocessor"></font> pthread_mutex_t mutex;
00084 <font class="preprocessor">#else</font>
00085 <font class="preprocessor"></font><font class="preprocessor"># error "No unfair mutex implementation for this OS"</font>
00086 <font class="preprocessor"></font><font class="preprocessor">#endif</font>
00087 <font class="preprocessor"></font>
00088 };
00089
00090
00091 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00092 <font class="preprocessor"></font>
00097 <font class="keyword">struct </font>TNelRtlCriticalSection {
00098 <font class="keywordtype">void</font> *DebugInfo;
00099 <font class="keywordtype">long</font> LockCount;
00100 <font class="keywordtype">long</font> RecursionCount;
00101 <font class="keywordtype">void</font> *OwningThread; <font class="comment">// from the thread's ClientId->UniqueThread</font>
00102 <font class="keywordtype">void</font> *LockSemaphore;
00103 <a class="code" href="types__nl_8h.html#a10">uint32</a> SpinCount;
00104 };
00105 <font class="preprocessor">#endif // NL_OS_WINDOWS</font>
00106 <font class="preprocessor"></font>
00107
<a name="l00131"></a><a class="code" href="classNLMISC_1_1CFairMutex.html">00131</a> <font class="keyword">class </font>CFairMutex
00132 {
00133 <font class="keyword">public</font>:
00134
00136 <a class="code" href="classNLMISC_1_1CFairMutex.html#a0">CFairMutex</a>();
00137 <a class="code" href="classNLMISC_1_1CFairMutex.html#a0">CFairMutex</a>(<font class="keyword">const</font> std::string &name);
00138
00140 <a class="code" href="classNLMISC_1_1CFairMutex.html#a2">~CFairMutex</a>();
00141
00142 <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CFairMutex.html#a3">enter</a> ();
00143 <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CFairMutex.html#a4">leave</a> ();
00144
<a name="l00145"></a><a class="code" href="classNLMISC_1_1CFairMutex.html#m0">00145</a> std::string <a class="code" href="classNLMISC_1_1CFairMutex.html#m0">Name</a>;
00146
00147 <font class="keyword">private</font>:
00148
00149 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00150 <font class="preprocessor"></font> TNelRtlCriticalSection _Cs;
00151 <font class="preprocessor">#elif defined NL_OS_UNIX</font>
00152 <font class="preprocessor"></font> <font class="keyword">volatile</font> sem_t _Sem;
00153 <font class="preprocessor">#else</font>
00154 <font class="preprocessor"></font><font class="preprocessor"># error "No fair mutex implementation for this OS"</font>
00155 <font class="preprocessor"></font><font class="preprocessor">#endif</font>
00156 <font class="preprocessor"></font>
00157
00158 <font class="preprocessor">#ifdef MUTEX_DEBUG</font>
00159 <font class="preprocessor"></font> <font class="comment">// debug stuffs</font>
00160 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a0">debugCreateMutex</a>();
00161 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a1">debugBeginEnter</a>();
00162 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a2">debugEndEnter</a>();
00163 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a3">debugLeave</a>();
00164 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a4">debugDeleteMutex</a>();
00165 <font class="preprocessor">#endif // MUTEX_DEBUG</font>
00166 <font class="preprocessor"></font>
00167 };
00168
00169
00170
00171
00172
00173
00174 <font class="comment">/*</font>
00175 <font class="comment"> * Debug info</font>
00176 <font class="comment"> */</font>
00177 <font class="preprocessor">#ifdef MUTEX_DEBUG</font>
00178 <font class="preprocessor"></font>
00179 <font class="keyword">struct </font>TMutexLocks
00180 {
00181 TMutexLocks(<a class="code" href="types__nl_8h.html#a10">uint32</a> m=0) : TimeToEnter(0), TimeInMutex(0), Nb(0), WaitingMutex(0), MutexNum(m), ThreadHavingTheMutex(0xFFFFFFFF), Dead(false) {}
00182
00183 <a class="code" href="types__nl_8h.html#a10">uint32</a> TimeToEnter; <font class="comment">// cumulated time blocking on enter</font>
00184 <a class="code" href="types__nl_8h.html#a10">uint32</a> TimeInMutex; <font class="comment">// cumulated time between enter and leave</font>
00185 <a class="code" href="types__nl_8h.html#a10">uint32</a> Nb; <font class="comment">// number of calls of enter</font>
00186 <a class="code" href="types__nl_8h.html#a10">uint32</a> WaitingMutex; <font class="comment">// number of thread that waiting this mutex</font>
00187 <a class="code" href="types__nl_8h.html#a9">sint32</a> MutexNum; <font class="comment">// identifying a mutex</font>
00188 <a class="code" href="types__nl_8h.html#a14">uint</a> ThreadHavingTheMutex; <font class="comment">// thread id of the thread that is in this mutex (0xFFFFFFFF if no thread)</font>
00189 <font class="keywordtype">bool</font> Dead; <font class="comment">// True if the mutex is dead (deleted)</font>
00190 std::string MutexName; <font class="comment">// Name of the mutex</font>
00191
00192 NLMISC::TTicks BeginEnter;
00193 NLMISC::TTicks EndEnter;
00194 };
00195
00197 <font class="keywordtype">void</font> initAcquireTimeMap();
00198
00200 std::map<CMutex*,TMutexLocks> getNewAcquireTimes();
00201
00203 <font class="keyword">extern</font> <a class="code" href="types__nl_8h.html#a10">uint32</a> NbMutexes;
00204
00205 <font class="preprocessor">#endif // MUTEX_DEBUG</font>
00206 <font class="preprocessor"></font>
00207
00208
00209
00210
00211 <font class="comment">// By default, all synchronization use the CFairSynchronized class to avoid freeze problem.</font>
<a name="l00212"></a><a class="code" href="mutex_8h.html#a1">00212</a> <font class="preprocessor">#define CSynchronized CFairSynchronized</font>
00213 <font class="preprocessor"></font>
00235 <font class="keyword">template</font> <<font class="keyword">class</font> T>
<a name="l00236"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized.html">00236</a> <font class="keyword">class </font>CUnfairSynchronized
00237 {
00238 <font class="keyword">public</font>:
00239
<a name="l00240"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized.html#a0">00240</a> <a class="code" href="classNLMISC_1_1CUnfairSynchronized.html#a0">CUnfairSynchronized</a> (<font class="keyword">const</font> std::string &name) : <a class="code" href="classNLMISC_1_1CUnfairSynchronized.html#o0">_Mutex</a>(name) { }
00241
<a name="l00245"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html">00245</a> <font class="keyword">class </font>CAccessor
00246 {
<a name="l00247"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#o0">00247</a> CUnfairSynchronized<T> *<a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#o0">Synchronized</a>;
00248 <font class="keyword">public</font>:
00249
<a name="l00251"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#a0">00251</a> <a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#a0">CAccessor</a>(CUnfairSynchronized<T> *cs)
00252 {
00253 Synchronized = cs;
00254 const_cast<CMutex&>(Synchronized->_Mutex).enter();
00255 }
00256
<a name="l00258"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#a1">00258</a> <a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#a1">~CAccessor</a>()
00259 {
00260 const_cast<CMutex&>(Synchronized->_Mutex).leave();
00261 }
00262
<a name="l00264"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#a2">00264</a> T &<a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#a2">value</a>()
00265 {
00266 <font class="keywordflow">return</font> const_cast<T&>(Synchronized->_Value);
00267 }
00268 };
00269
00270 <font class="keyword">private</font>:
00271
<a name="l00272"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized.html#l0">00272</a> <font class="keyword">friend</font> <font class="keyword">class </font><a class="code" href="classNLMISC_1_1CUnfairSynchronized.html#a0">CUnfairSynchronized</a>::CAccessor;
00273
<a name="l00275"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized.html#o0">00275</a> volatile CUnfairMutex <a class="code" href="classNLMISC_1_1CUnfairSynchronized.html#o0">_Mutex</a>;
00276
<a name="l00278"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized.html#o1">00278</a> volatile T <a class="code" href="classNLMISC_1_1CUnfairSynchronized.html#o1">_Value</a>;
00279 };
00280
00281
00290 template <class T>
<a name="l00291"></a><a class="code" href="classNLMISC_1_1CFairSynchronized.html">00291</a> class CFairSynchronized
00292 {
00293 <font class="keyword">public</font>:
00294
<a name="l00295"></a><a class="code" href="classNLMISC_1_1CFairSynchronized.html#a0">00295</a> CFairSynchronized (<font class="keyword">const</font> std::string &name) : _Cs(name) { }
00296
<a name="l00300"></a><a class="code" href="classNLMISC_1_1CFairSynchronized_1_1CAccessor.html">00300</a> <font class="keyword">class </font>CAccessor
00301 {
<a name="l00302"></a><a class="code" href="classNLMISC_1_1CFairSynchronized_1_1CAccessor.html#o0">00302</a> CFairSynchronized<T> *Synchronized;
00303 <font class="keyword">public</font>:
00304
<a name="l00306"></a><a class="code" href="classNLMISC_1_1CFairSynchronized_1_1CAccessor.html#a0">00306</a> CAccessor(CFairSynchronized<T> *cs)
00307 {
00308 Synchronized = cs;
00309 const_cast<CFairMutex&>(Synchronized->_Cs).enter();
00310 }
00311
<a name="l00313"></a><a class="code" href="classNLMISC_1_1CFairSynchronized_1_1CAccessor.html#a1">00313</a> ~CAccessor()
00314 {
00315 const_cast<CFairMutex&>(Synchronized->_Cs).leave();
00316 }
00317
<a name="l00319"></a><a class="code" href="classNLMISC_1_1CFairSynchronized_1_1CAccessor.html#a2">00319</a> T &<a class="code" href="driver__opengl__extension__def_8h.html#a415">value</a>()
00320 {
00321 <font class="keywordflow">return</font> const_cast<T&>(Synchronized->_Value);
00322 }
00323 };
00324
00325 <font class="keyword">private</font>:
00326
<a name="l00327"></a><a class="code" href="classNLMISC_1_1CFairSynchronized.html#l0">00327</a> <font class="keyword">friend</font> <font class="keyword">class </font>CFairSynchronized::CAccessor;
00328
<a name="l00330"></a><a class="code" href="classNLMISC_1_1CFairSynchronized.html#o0">00330</a> volatile CFairMutex _Cs;
00331
<a name="l00333"></a><a class="code" href="classNLMISC_1_1CFairSynchronized.html#o1">00333</a> volatile T _Value;
00334 };
00335
00336 } <font class="comment">// NLMISC</font>
00337
00338
00339 #endif <font class="comment">// NL_MUTEX_H</font>
00340
00341 <font class="comment">/* End of mutex.h */</font>
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