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<h1>mutex.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment">    Copyright 2005-2010 Intel Corporation.  All Rights Reserved.</span>
<a name="l00003"></a>00003 <span class="comment"></span>
<a name="l00004"></a>00004 <span class="comment">    The source code contained or described herein and all documents related</span>
<a name="l00005"></a>00005 <span class="comment">    to the source code ("Material") are owned by Intel Corporation or its</span>
<a name="l00006"></a>00006 <span class="comment">    suppliers or licensors.  Title to the Material remains with Intel</span>
<a name="l00007"></a>00007 <span class="comment">    Corporation or its suppliers and licensors.  The Material is protected</span>
<a name="l00008"></a>00008 <span class="comment">    by worldwide copyright laws and treaty provisions.  No part of the</span>
<a name="l00009"></a>00009 <span class="comment">    Material may be used, copied, reproduced, modified, published, uploaded,</span>
<a name="l00010"></a>00010 <span class="comment">    posted, transmitted, distributed, or disclosed in any way without</span>
<a name="l00011"></a>00011 <span class="comment">    Intel's prior express written permission.</span>
<a name="l00012"></a>00012 <span class="comment"></span>
<a name="l00013"></a>00013 <span class="comment">    No license under any patent, copyright, trade secret or other</span>
<a name="l00014"></a>00014 <span class="comment">    intellectual property right is granted to or conferred upon you by</span>
<a name="l00015"></a>00015 <span class="comment">    disclosure or delivery of the Materials, either expressly, by</span>
<a name="l00016"></a>00016 <span class="comment">    implication, inducement, estoppel or otherwise.  Any license under such</span>
<a name="l00017"></a>00017 <span class="comment">    intellectual property rights must be express and approved by Intel in</span>
<a name="l00018"></a>00018 <span class="comment">    writing.</span>
<a name="l00019"></a>00019 <span class="comment">*/</span>
<a name="l00020"></a>00020 
<a name="l00021"></a>00021 <span class="preprocessor">#ifndef __TBB_mutex_H</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define __TBB_mutex_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#if _WIN32||_WIN64</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span><span class="preprocessor">    #include &lt;windows.h&gt;</span>
<a name="l00026"></a>00026 <span class="preprocessor">    #if !defined(_WIN32_WINNT)</span>
<a name="l00027"></a>00027 <span class="preprocessor"></span>    <span class="comment">// The following Windows API function is declared explicitly;</span>
<a name="l00028"></a>00028     <span class="comment">// otherwise any user would have to specify /D_WIN32_WINNT=0x0400</span>
<a name="l00029"></a>00029     <span class="keyword">extern</span> <span class="stringliteral">"C"</span> BOOL WINAPI TryEnterCriticalSection( LPCRITICAL_SECTION );
<a name="l00030"></a>00030 <span class="preprocessor">    #endif</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#else </span><span class="comment">/* if not _WIN32||_WIN64 */</span>
<a name="l00032"></a>00032 <span class="preprocessor">    #include &lt;pthread.h&gt;</span>
<a name="l00033"></a>00033 <span class="preprocessor">#endif </span><span class="comment">/* _WIN32||_WIN64 */</span>
<a name="l00034"></a>00034 
<a name="l00035"></a>00035 <span class="preprocessor">#include &lt;new&gt;</span>
<a name="l00036"></a>00036 <span class="preprocessor">#include "aligned_space.h"</span>
<a name="l00037"></a>00037 <span class="preprocessor">#include "tbb_stddef.h"</span>
<a name="l00038"></a>00038 <span class="preprocessor">#include "tbb_profiling.h"</span>
<a name="l00039"></a>00039 
<a name="l00040"></a>00040 <span class="keyword">namespace </span>tbb {
<a name="l00041"></a>00041 
<a name="l00043"></a>00043 
<a name="l00045"></a><a class="code" href="a00172.html">00045</a> <span class="keyword">class </span><a class="code" href="a00172.html">mutex</a> {
<a name="l00046"></a>00046 <span class="keyword">public</span>:
<a name="l00048"></a><a class="code" href="a00172.html#05313cb77d4f85213103d4dab74ed454">00048</a>     <a class="code" href="a00172.html#05313cb77d4f85213103d4dab74ed454">mutex</a>() {
<a name="l00049"></a>00049 <span class="preprocessor">#if TBB_USE_ASSERT || TBB_USE_THREADING_TOOLS</span>
<a name="l00050"></a>00050 <span class="preprocessor"></span>    internal_construct();
<a name="l00051"></a>00051 <span class="preprocessor">#else</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span><span class="preprocessor">  #if _WIN32||_WIN64</span>
<a name="l00053"></a>00053 <span class="preprocessor"></span>        InitializeCriticalSection(&amp;impl);
<a name="l00054"></a>00054 <span class="preprocessor">  #else</span>
<a name="l00055"></a>00055 <span class="preprocessor"></span>        <span class="keywordtype">int</span> error_code = pthread_mutex_init(&amp;impl,NULL);
<a name="l00056"></a>00056         <span class="keywordflow">if</span>( error_code )
<a name="l00057"></a>00057             tbb::internal::handle_perror(error_code,<span class="stringliteral">"mutex: pthread_mutex_init failed"</span>);
<a name="l00058"></a>00058 <span class="preprocessor">  #endif </span><span class="comment">/* _WIN32||_WIN64*/</span>
<a name="l00059"></a>00059 <span class="preprocessor">#endif </span><span class="comment">/* TBB_USE_ASSERT */</span>
<a name="l00060"></a>00060     };
<a name="l00061"></a>00061 
<a name="l00062"></a>00062     ~<a class="code" href="a00172.html">mutex</a>() {
<a name="l00063"></a>00063 <span class="preprocessor">#if TBB_USE_ASSERT</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span>        internal_destroy();
<a name="l00065"></a>00065 <span class="preprocessor">#else</span>
<a name="l00066"></a>00066 <span class="preprocessor"></span><span class="preprocessor">  #if _WIN32||_WIN64</span>
<a name="l00067"></a>00067 <span class="preprocessor"></span>        DeleteCriticalSection(&amp;impl);
<a name="l00068"></a>00068 <span class="preprocessor">  #else</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span>        pthread_mutex_destroy(&amp;impl); 
<a name="l00070"></a>00070 
<a name="l00071"></a>00071 <span class="preprocessor">  #endif </span><span class="comment">/* _WIN32||_WIN64 */</span>
<a name="l00072"></a>00072 <span class="preprocessor">#endif </span><span class="comment">/* TBB_USE_ASSERT */</span>
<a name="l00073"></a>00073     };
<a name="l00074"></a>00074 
<a name="l00075"></a>00075     <span class="keyword">class </span>scoped_lock;
<a name="l00076"></a>00076     <span class="keyword">friend</span> <span class="keyword">class </span>scoped_lock;
<a name="l00077"></a>00077 
<a name="l00079"></a>00079 
<a name="l00081"></a><a class="code" href="a00173.html">00081</a>     <span class="keyword">class </span><a class="code" href="a00173.html">scoped_lock</a> : internal::no_copy {
<a name="l00082"></a>00082     <span class="keyword">public</span>:
<a name="l00084"></a><a class="code" href="a00173.html#1d403ae51b484df5d86d85ae38f11e6e">00084</a>         <a class="code" href="a00173.html#1d403ae51b484df5d86d85ae38f11e6e">scoped_lock</a>() : my_mutex(NULL) {};
<a name="l00085"></a>00085 
<a name="l00087"></a><a class="code" href="a00173.html#605a6b9af0f8cdabdf81825e0de99600">00087</a>         <a class="code" href="a00173.html#1d403ae51b484df5d86d85ae38f11e6e">scoped_lock</a>( <a class="code" href="a00172.html">mutex</a>&amp; <a class="code" href="a00172.html">mutex</a> ) {
<a name="l00088"></a>00088             <a class="code" href="a00173.html#862e022841cdc522e4296a5533b22efd">acquire</a>( mutex );
<a name="l00089"></a>00089         }
<a name="l00090"></a>00090 
<a name="l00092"></a><a class="code" href="a00173.html#0ebbbecaf4311e9df7362cb76ceaa368">00092</a>         <a class="code" href="a00173.html#0ebbbecaf4311e9df7362cb76ceaa368">~scoped_lock</a>() {
<a name="l00093"></a>00093             <span class="keywordflow">if</span>( my_mutex ) 
<a name="l00094"></a>00094                 <a class="code" href="a00173.html#0d51d18cd99df3b2e93bf07378d0992c">release</a>();
<a name="l00095"></a>00095         }
<a name="l00096"></a>00096 
<a name="l00098"></a><a class="code" href="a00173.html#862e022841cdc522e4296a5533b22efd">00098</a>         <span class="keywordtype">void</span> <a class="code" href="a00173.html#862e022841cdc522e4296a5533b22efd">acquire</a>( <a class="code" href="a00172.html">mutex</a>&amp; <a class="code" href="a00172.html">mutex</a> ) {
<a name="l00099"></a>00099 <span class="preprocessor">#if TBB_USE_ASSERT</span>
<a name="l00100"></a>00100 <span class="preprocessor"></span>            internal_acquire(mutex);
<a name="l00101"></a>00101 <span class="preprocessor">#else</span>
<a name="l00102"></a>00102 <span class="preprocessor"></span>            mutex.<a class="code" href="a00172.html#4470e61c24c129a0299ca6c17240adbb">lock</a>();
<a name="l00103"></a>00103             my_mutex = &amp;mutex;
<a name="l00104"></a>00104 <span class="preprocessor">#endif </span><span class="comment">/* TBB_USE_ASSERT */</span>
<a name="l00105"></a>00105         }
<a name="l00106"></a>00106 
<a name="l00108"></a><a class="code" href="a00173.html#591e0c49b82bcedffcbe0923f1b915ec">00108</a>         <span class="keywordtype">bool</span> <a class="code" href="a00173.html#591e0c49b82bcedffcbe0923f1b915ec">try_acquire</a>( <a class="code" href="a00172.html">mutex</a>&amp; <a class="code" href="a00172.html">mutex</a> ) {
<a name="l00109"></a>00109 <span class="preprocessor">#if TBB_USE_ASSERT</span>
<a name="l00110"></a>00110 <span class="preprocessor"></span>            <span class="keywordflow">return</span> internal_try_acquire (mutex);
<a name="l00111"></a>00111 <span class="preprocessor">#else</span>
<a name="l00112"></a>00112 <span class="preprocessor"></span>            <span class="keywordtype">bool</span> result = mutex.<a class="code" href="a00172.html#4331652c79dea1c1131bd59ab161b234">try_lock</a>();
<a name="l00113"></a>00113             <span class="keywordflow">if</span>( result )
<a name="l00114"></a>00114                 my_mutex = &amp;mutex;
<a name="l00115"></a>00115             <span class="keywordflow">return</span> result;
<a name="l00116"></a>00116 <span class="preprocessor">#endif </span><span class="comment">/* TBB_USE_ASSERT */</span>
<a name="l00117"></a>00117         }
<a name="l00118"></a>00118 
<a name="l00120"></a><a class="code" href="a00173.html#0d51d18cd99df3b2e93bf07378d0992c">00120</a>         <span class="keywordtype">void</span> <a class="code" href="a00173.html#0d51d18cd99df3b2e93bf07378d0992c">release</a>() {
<a name="l00121"></a>00121 <span class="preprocessor">#if TBB_USE_ASSERT</span>
<a name="l00122"></a>00122 <span class="preprocessor"></span>            internal_release ();
<a name="l00123"></a>00123 <span class="preprocessor">#else</span>
<a name="l00124"></a>00124 <span class="preprocessor"></span>            my_mutex-&gt;<a class="code" href="a00172.html#5fc9ef443ae75d966695546be399cc6b">unlock</a>();
<a name="l00125"></a>00125             my_mutex = NULL;
<a name="l00126"></a>00126 <span class="preprocessor">#endif </span><span class="comment">/* TBB_USE_ASSERT */</span>
<a name="l00127"></a>00127         }
<a name="l00128"></a>00128 
<a name="l00129"></a>00129     <span class="keyword">private</span>:
<a name="l00131"></a>00131         <a class="code" href="a00172.html">mutex</a>* my_mutex;
<a name="l00132"></a>00132 
<a name="l00134"></a>00134         <span class="keywordtype">void</span> __TBB_EXPORTED_METHOD internal_acquire( <a class="code" href="a00172.html">mutex</a>&amp; m );
<a name="l00135"></a>00135 
<a name="l00137"></a>00137         <span class="keywordtype">bool</span> __TBB_EXPORTED_METHOD internal_try_acquire( <a class="code" href="a00172.html">mutex</a>&amp; m );
<a name="l00138"></a>00138 
<a name="l00140"></a>00140         <span class="keywordtype">void</span> __TBB_EXPORTED_METHOD internal_release();
<a name="l00141"></a>00141 
<a name="l00142"></a>00142         <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="a00172.html">mutex</a>;
<a name="l00143"></a>00143     };
<a name="l00144"></a>00144 
<a name="l00145"></a>00145     <span class="comment">// Mutex traits</span>
<a name="l00146"></a>00146     <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> is_rw_mutex = <span class="keyword">false</span>;
<a name="l00147"></a>00147     <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> is_recursive_mutex = <span class="keyword">false</span>;
<a name="l00148"></a>00148     <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> is_fair_mutex = <span class="keyword">false</span>;
<a name="l00149"></a>00149 
<a name="l00150"></a>00150     <span class="comment">// ISO C++0x compatibility methods</span>
<a name="l00151"></a>00151 
<a name="l00153"></a><a class="code" href="a00172.html#4470e61c24c129a0299ca6c17240adbb">00153</a>     <span class="keywordtype">void</span> <a class="code" href="a00172.html#4470e61c24c129a0299ca6c17240adbb">lock</a>() {
<a name="l00154"></a>00154 <span class="preprocessor">#if TBB_USE_ASSERT</span>
<a name="l00155"></a>00155 <span class="preprocessor"></span>        <a class="code" href="a00141.html">aligned_space&lt;scoped_lock,1&gt;</a> tmp;
<a name="l00156"></a>00156         <span class="keyword">new</span>(tmp.<a class="code" href="a00141.html#0d702fc6b9e9d061ace3501b3c861cdf">begin</a>()) <a class="code" href="a00173.html">scoped_lock</a>(*<span class="keyword">this</span>);
<a name="l00157"></a>00157 <span class="preprocessor">#else</span>
<a name="l00158"></a>00158 <span class="preprocessor"></span><span class="preprocessor">  #if _WIN32||_WIN64</span>
<a name="l00159"></a>00159 <span class="preprocessor"></span>        EnterCriticalSection(&amp;impl);
<a name="l00160"></a>00160 <span class="preprocessor">  #else</span>
<a name="l00161"></a>00161 <span class="preprocessor"></span>        pthread_mutex_lock(&amp;impl);
<a name="l00162"></a>00162 <span class="preprocessor">  #endif </span><span class="comment">/* _WIN32||_WIN64 */</span>
<a name="l00163"></a>00163 <span class="preprocessor">#endif </span><span class="comment">/* TBB_USE_ASSERT */</span>
<a name="l00164"></a>00164     }
<a name="l00165"></a>00165 
<a name="l00167"></a>00167 
<a name="l00168"></a><a class="code" href="a00172.html#4331652c79dea1c1131bd59ab161b234">00168</a>     <span class="keywordtype">bool</span> <a class="code" href="a00172.html#4331652c79dea1c1131bd59ab161b234">try_lock</a>() {
<a name="l00169"></a>00169 <span class="preprocessor">#if TBB_USE_ASSERT</span>
<a name="l00170"></a>00170 <span class="preprocessor"></span>        <a class="code" href="a00141.html">aligned_space&lt;scoped_lock,1&gt;</a> tmp;
<a name="l00171"></a>00171         <a class="code" href="a00173.html">scoped_lock</a>&amp; s = *tmp.<a class="code" href="a00141.html#0d702fc6b9e9d061ace3501b3c861cdf">begin</a>();
<a name="l00172"></a>00172         s.<a class="code" href="a00173.html#be42c8fe11cce1af4fe1e9eaab717567">my_mutex</a> = NULL;
<a name="l00173"></a>00173         <span class="keywordflow">return</span> s.<a class="code" href="a00173.html#e86ffb41a026694b16637f78aa337874">internal_try_acquire</a>(*<span class="keyword">this</span>);
<a name="l00174"></a>00174 <span class="preprocessor">#else</span>
<a name="l00175"></a>00175 <span class="preprocessor"></span><span class="preprocessor">  #if _WIN32||_WIN64</span>
<a name="l00176"></a>00176 <span class="preprocessor"></span>        <span class="keywordflow">return</span> TryEnterCriticalSection(&amp;impl)!=0;
<a name="l00177"></a>00177 <span class="preprocessor">  #else</span>
<a name="l00178"></a>00178 <span class="preprocessor"></span>        <span class="keywordflow">return</span> pthread_mutex_trylock(&amp;impl)==0;
<a name="l00179"></a>00179 <span class="preprocessor">  #endif </span><span class="comment">/* _WIN32||_WIN64 */</span>
<a name="l00180"></a>00180 <span class="preprocessor">#endif </span><span class="comment">/* TBB_USE_ASSERT */</span>
<a name="l00181"></a>00181     }
<a name="l00182"></a>00182 
<a name="l00184"></a><a class="code" href="a00172.html#5fc9ef443ae75d966695546be399cc6b">00184</a>     <span class="keywordtype">void</span> <a class="code" href="a00172.html#5fc9ef443ae75d966695546be399cc6b">unlock</a>() {
<a name="l00185"></a>00185 <span class="preprocessor">#if TBB_USE_ASSERT</span>
<a name="l00186"></a>00186 <span class="preprocessor"></span>        <a class="code" href="a00141.html">aligned_space&lt;scoped_lock,1&gt;</a> tmp;
<a name="l00187"></a>00187         <a class="code" href="a00173.html">scoped_lock</a>&amp; s = *tmp.<a class="code" href="a00141.html#0d702fc6b9e9d061ace3501b3c861cdf">begin</a>();
<a name="l00188"></a>00188         s.<a class="code" href="a00173.html#be42c8fe11cce1af4fe1e9eaab717567">my_mutex</a> = <span class="keyword">this</span>;
<a name="l00189"></a>00189         s.<a class="code" href="a00173.html#448b7e9042afcdc455ea3f929ac4c594">internal_release</a>();
<a name="l00190"></a>00190 <span class="preprocessor">#else</span>
<a name="l00191"></a>00191 <span class="preprocessor"></span><span class="preprocessor">  #if _WIN32||_WIN64</span>
<a name="l00192"></a>00192 <span class="preprocessor"></span>        LeaveCriticalSection(&amp;impl);
<a name="l00193"></a>00193 <span class="preprocessor">  #else</span>
<a name="l00194"></a>00194 <span class="preprocessor"></span>        pthread_mutex_unlock(&amp;impl);
<a name="l00195"></a>00195 <span class="preprocessor">  #endif </span><span class="comment">/* _WIN32||_WIN64 */</span>
<a name="l00196"></a>00196 <span class="preprocessor">#endif </span><span class="comment">/* TBB_USE_ASSERT */</span>
<a name="l00197"></a>00197     }
<a name="l00198"></a>00198 
<a name="l00200"></a>00200 <span class="preprocessor">  #if _WIN32||_WIN64</span>
<a name="l00201"></a><a class="code" href="a00172.html#9f1ec84d5815263ceae853f06ddb4cac">00201</a> <span class="preprocessor"></span>    <span class="keyword">typedef</span> LPCRITICAL_SECTION <a class="code" href="a00172.html#9f1ec84d5815263ceae853f06ddb4cac">native_handle_type</a>;
<a name="l00202"></a>00202 <span class="preprocessor">  #else</span>
<a name="l00203"></a>00203 <span class="preprocessor"></span>    <span class="keyword">typedef</span> pthread_mutex_t* <a class="code" href="a00172.html#9f1ec84d5815263ceae853f06ddb4cac">native_handle_type</a>;
<a name="l00204"></a>00204 <span class="preprocessor">  #endif</span>
<a name="l00205"></a>00205 <span class="preprocessor"></span>    <a class="code" href="a00172.html#9f1ec84d5815263ceae853f06ddb4cac">native_handle_type</a> native_handle() { <span class="keywordflow">return</span> (<a class="code" href="a00172.html#9f1ec84d5815263ceae853f06ddb4cac">native_handle_type</a>) &amp;impl; }
<a name="l00206"></a>00206 
<a name="l00207"></a>00207     <span class="keyword">enum</span> state_t {
<a name="l00208"></a>00208         INITIALIZED=0x1234,
<a name="l00209"></a>00209         DESTROYED=0x789A,
<a name="l00210"></a>00210         HELD=0x56CD
<a name="l00211"></a>00211     };
<a name="l00212"></a>00212 <span class="keyword">private</span>:
<a name="l00213"></a>00213 <span class="preprocessor">#if _WIN32||_WIN64</span>
<a name="l00214"></a>00214 <span class="preprocessor"></span>    CRITICAL_SECTION impl;    
<a name="l00215"></a>00215     <span class="keyword">enum</span> state_t state;
<a name="l00216"></a>00216 <span class="preprocessor">#else</span>
<a name="l00217"></a>00217 <span class="preprocessor"></span>    pthread_mutex_t impl;
<a name="l00218"></a>00218 <span class="preprocessor">#endif </span><span class="comment">/* _WIN32||_WIN64 */</span>
<a name="l00219"></a>00219 
<a name="l00221"></a>00221     <span class="keywordtype">void</span> __TBB_EXPORTED_METHOD internal_construct();
<a name="l00222"></a>00222 
<a name="l00224"></a>00224     <span class="keywordtype">void</span> __TBB_EXPORTED_METHOD internal_destroy();
<a name="l00225"></a>00225 
<a name="l00226"></a>00226 <span class="preprocessor">#if _WIN32||_WIN64</span>
<a name="l00227"></a>00227 <span class="preprocessor"></span><span class="keyword">public</span>:
<a name="l00229"></a><a class="code" href="a00172.html#795649a185b0d6af6dc81c5f378616dd">00229</a>     <span class="keywordtype">void</span> <a class="code" href="a00172.html#795649a185b0d6af6dc81c5f378616dd">set_state</a>( state_t to ) { state = to; }
<a name="l00230"></a>00230 <span class="preprocessor">#endif</span>
<a name="l00231"></a>00231 <span class="preprocessor"></span>};
<a name="l00232"></a>00232 
<a name="l00233"></a>00233 __TBB_DEFINE_PROFILING_SET_NAME(mutex)
<a name="l00234"></a>00234 
<a name="l00235"></a>00235 } <span class="comment">// namespace tbb </span>
<a name="l00236"></a>00236 
<a name="l00237"></a>00237 <span class="preprocessor">#endif </span><span class="comment">/* __TBB_mutex_H */</span>
</pre></div><hr>
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