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authorneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
committerneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
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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 &lt;map&gt;</font>
+00033
+00034 <font class="preprocessor">#ifdef NL_OS_UNIX</font>
+00035 <font class="preprocessor"></font><font class="preprocessor">#include &lt;pthread.h&gt;</font>
+00036 <font class="preprocessor">#include &lt;semaphore.h&gt;</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 &amp;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-&gt;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 &amp;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&lt;CMutex*,TMutexLocks&gt; 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> &lt;<font class="keyword">class</font> T&gt;
+<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 &amp;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&lt;T&gt; *<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&lt;T&gt; *cs)
+00252 {
+00253 Synchronized = cs;
+00254 const_cast&lt;CMutex&amp;&gt;(Synchronized-&gt;_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&lt;CMutex&amp;&gt;(Synchronized-&gt;_Mutex).leave();
+00261 }
+00262
+<a name="l00264"></a><a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#a2">00264</a> T &amp;<a class="code" href="classNLMISC_1_1CUnfairSynchronized_1_1CAccessor.html#a2">value</a>()
+00265 {
+00266 <font class="keywordflow">return</font> const_cast&lt;T&amp;&gt;(Synchronized-&gt;_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 &lt;class T&gt;
+<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 &amp;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&lt;T&gt; *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&lt;T&gt; *cs)
+00307 {
+00308 Synchronized = cs;
+00309 const_cast&lt;CFairMutex&amp;&gt;(Synchronized-&gt;_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&lt;CFairMutex&amp;&gt;(Synchronized-&gt;_Cs).leave();
+00316 }
+00317
+<a name="l00319"></a><a class="code" href="classNLMISC_1_1CFairSynchronized_1_1CAccessor.html#a2">00319</a> T &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a415">value</a>()
+00320 {
+00321 <font class="keywordflow">return</font> const_cast&lt;T&amp;&gt;(Synchronized-&gt;_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>
+</pre></div>
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