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| <h1>queuing_rw_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_queuing_rw_mutex_H</span> |
| <a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define __TBB_queuing_rw_mutex_H</span> |
| <a name="l00023"></a>00023 <span class="preprocessor"></span> |
| <a name="l00024"></a>00024 <span class="preprocessor">#include "tbb_config.h"</span> |
| <a name="l00025"></a>00025 |
| <a name="l00026"></a>00026 <span class="preprocessor">#if !TBB_USE_EXCEPTIONS && _MSC_VER</span> |
| <a name="l00027"></a>00027 <span class="preprocessor"></span> <span class="comment">// Suppress "C++ exception handler used, but unwind semantics are not enabled" warning in STL headers</span> |
| <a name="l00028"></a>00028 <span class="preprocessor"> #pragma warning (push)</span> |
| <a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor"> #pragma warning (disable: 4530)</span> |
| <a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor">#endif</span> |
| <a name="l00031"></a>00031 <span class="preprocessor"></span> |
| <a name="l00032"></a>00032 <span class="preprocessor">#include <cstring></span> |
| <a name="l00033"></a>00033 |
| <a name="l00034"></a>00034 <span class="preprocessor">#if !TBB_USE_EXCEPTIONS && _MSC_VER</span> |
| <a name="l00035"></a>00035 <span class="preprocessor"></span><span class="preprocessor"> #pragma warning (pop)</span> |
| <a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor">#endif</span> |
| <a name="l00037"></a>00037 <span class="preprocessor"></span> |
| <a name="l00038"></a>00038 <span class="preprocessor">#include "atomic.h"</span> |
| <a name="l00039"></a>00039 <span class="preprocessor">#include "tbb_profiling.h"</span> |
| <a name="l00040"></a>00040 |
| <a name="l00041"></a>00041 <span class="keyword">namespace </span>tbb { |
| <a name="l00042"></a>00042 |
| <a name="l00044"></a>00044 |
| <a name="l00047"></a><a class="code" href="a00184.html">00047</a> <span class="keyword">class </span><a class="code" href="a00184.html">queuing_rw_mutex</a> { |
| <a name="l00048"></a>00048 <span class="keyword">public</span>: |
| <a name="l00050"></a><a class="code" href="a00184.html#85c90877c3447690ac4e2ac4ff8dea5e">00050</a> <a class="code" href="a00184.html#85c90877c3447690ac4e2ac4ff8dea5e">queuing_rw_mutex</a>() { |
| <a name="l00051"></a>00051 q_tail = NULL; |
| <a name="l00052"></a>00052 <span class="preprocessor">#if TBB_USE_THREADING_TOOLS</span> |
| <a name="l00053"></a>00053 <span class="preprocessor"></span> internal_construct(); |
| <a name="l00054"></a>00054 <span class="preprocessor">#endif</span> |
| <a name="l00055"></a>00055 <span class="preprocessor"></span> } |
| <a name="l00056"></a>00056 |
| <a name="l00058"></a><a class="code" href="a00184.html#1ba73e3d95cfdf8323880bc623af9099">00058</a> <a class="code" href="a00184.html#1ba73e3d95cfdf8323880bc623af9099">~queuing_rw_mutex</a>() { |
| <a name="l00059"></a>00059 <span class="preprocessor">#if TBB_USE_ASSERT</span> |
| <a name="l00060"></a>00060 <span class="preprocessor"></span> __TBB_ASSERT( !q_tail, <span class="stringliteral">"destruction of an acquired mutex"</span>); |
| <a name="l00061"></a>00061 <span class="preprocessor">#endif</span> |
| <a name="l00062"></a>00062 <span class="preprocessor"></span> } |
| <a name="l00063"></a>00063 |
| <a name="l00064"></a>00064 <span class="keyword">class </span>scoped_lock; |
| <a name="l00065"></a>00065 <span class="keyword">friend</span> <span class="keyword">class </span>scoped_lock; |
| <a name="l00066"></a>00066 |
| <a name="l00068"></a>00068 |
| <a name="l00070"></a><a class="code" href="a00185.html">00070</a> <span class="keyword">class </span><a class="code" href="a00185.html">scoped_lock</a>: internal::no_copy { |
| <a name="l00072"></a>00072 <span class="keywordtype">void</span> initialize() { |
| <a name="l00073"></a>00073 <a class="code" href="a00172.html">mutex</a> = NULL; |
| <a name="l00074"></a>00074 <span class="preprocessor">#if TBB_USE_ASSERT</span> |
| <a name="l00075"></a>00075 <span class="preprocessor"></span> state = 0xFF; <span class="comment">// Set to invalid state</span> |
| <a name="l00076"></a>00076 internal::poison_pointer(next); |
| <a name="l00077"></a>00077 internal::poison_pointer(prev); |
| <a name="l00078"></a>00078 <span class="preprocessor">#endif </span><span class="comment">/* TBB_USE_ASSERT */</span> |
| <a name="l00079"></a>00079 } |
| <a name="l00080"></a>00080 <span class="keyword">public</span>: |
| <a name="l00082"></a>00082 |
| <a name="l00083"></a><a class="code" href="a00185.html#c62e365be7bcbba091c9ea7454a4d22c">00083</a> <a class="code" href="a00185.html#c62e365be7bcbba091c9ea7454a4d22c">scoped_lock</a>() {initialize();} |
| <a name="l00084"></a>00084 |
| <a name="l00086"></a><a class="code" href="a00185.html#fbb8798792d3aebb136c46fc63d2529e">00086</a> <a class="code" href="a00185.html#c62e365be7bcbba091c9ea7454a4d22c">scoped_lock</a>( <a class="code" href="a00184.html">queuing_rw_mutex</a>& m, <span class="keywordtype">bool</span> write=<span class="keyword">true</span> ) { |
| <a name="l00087"></a>00087 initialize(); |
| <a name="l00088"></a>00088 <a class="code" href="a00185.html#a8dd5ab8686e76de21587544dbb681e0">acquire</a>(m,write); |
| <a name="l00089"></a>00089 } |
| <a name="l00090"></a>00090 |
| <a name="l00092"></a><a class="code" href="a00185.html#32c7d67a660d23ebbaab1a1d2826d31a">00092</a> <a class="code" href="a00185.html#32c7d67a660d23ebbaab1a1d2826d31a">~scoped_lock</a>() { |
| <a name="l00093"></a>00093 <span class="keywordflow">if</span>( <a class="code" href="a00172.html">mutex</a> ) <a class="code" href="a00185.html#67ae221109ddc69510ab593874e435d4">release</a>(); |
| <a name="l00094"></a>00094 } |
| <a name="l00095"></a>00095 |
| <a name="l00097"></a>00097 <span class="keywordtype">void</span> <a class="code" href="a00185.html#a8dd5ab8686e76de21587544dbb681e0">acquire</a>( <a class="code" href="a00184.html">queuing_rw_mutex</a>& m, <span class="keywordtype">bool</span> write=<span class="keyword">true</span> ); |
| <a name="l00098"></a>00098 |
| <a name="l00100"></a>00100 <span class="keywordtype">bool</span> <a class="code" href="a00185.html#2e4ff6c9ec2fee6682f95290d1f42baa">try_acquire</a>( <a class="code" href="a00184.html">queuing_rw_mutex</a>& m, <span class="keywordtype">bool</span> write=<span class="keyword">true</span> ); |
| <a name="l00101"></a>00101 |
| <a name="l00103"></a>00103 <span class="keywordtype">void</span> <a class="code" href="a00185.html#67ae221109ddc69510ab593874e435d4">release</a>(); |
| <a name="l00104"></a>00104 |
| <a name="l00106"></a>00106 |
| <a name="l00107"></a>00107 <span class="keywordtype">bool</span> <a class="code" href="a00185.html#11ba1da4a722c9e6f73339a52c487e82">upgrade_to_writer</a>(); |
| <a name="l00108"></a>00108 |
| <a name="l00110"></a>00110 <span class="keywordtype">bool</span> <a class="code" href="a00185.html#0d2f93edf7b15ec4bcee138823220c52">downgrade_to_reader</a>(); |
| <a name="l00111"></a>00111 |
| <a name="l00112"></a>00112 <span class="keyword">private</span>: |
| <a name="l00114"></a>00114 <a class="code" href="a00184.html">queuing_rw_mutex</a>* <a class="code" href="a00172.html">mutex</a>; |
| <a name="l00115"></a>00115 |
| <a name="l00117"></a>00117 <a class="code" href="a00185.html">scoped_lock</a> * prev, * next; |
| <a name="l00118"></a>00118 |
| <a name="l00119"></a>00119 <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> state_t; |
| <a name="l00120"></a>00120 |
| <a name="l00122"></a>00122 <a class="code" href="a00143.html">atomic<state_t></a> state; |
| <a name="l00123"></a>00123 |
| <a name="l00125"></a>00125 |
| <a name="l00126"></a>00126 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> going; |
| <a name="l00127"></a>00127 |
| <a name="l00129"></a>00129 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> internal_lock; |
| <a name="l00130"></a>00130 |
| <a name="l00132"></a>00132 <span class="keywordtype">void</span> acquire_internal_lock(); |
| <a name="l00133"></a>00133 |
| <a name="l00135"></a>00135 |
| <a name="l00136"></a>00136 <span class="keywordtype">bool</span> try_acquire_internal_lock(); |
| <a name="l00137"></a>00137 |
| <a name="l00139"></a>00139 <span class="keywordtype">void</span> release_internal_lock(); |
| <a name="l00140"></a>00140 |
| <a name="l00142"></a>00142 <span class="keywordtype">void</span> wait_for_release_of_internal_lock(); |
| <a name="l00143"></a>00143 |
| <a name="l00145"></a>00145 <span class="keywordtype">void</span> unblock_or_wait_on_internal_lock( uintptr_t ); |
| <a name="l00146"></a>00146 }; |
| <a name="l00147"></a>00147 |
| <a name="l00148"></a>00148 <span class="keywordtype">void</span> __TBB_EXPORTED_METHOD internal_construct(); |
| <a name="l00149"></a>00149 |
| <a name="l00150"></a>00150 <span class="comment">// Mutex traits</span> |
| <a name="l00151"></a>00151 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> is_rw_mutex = <span class="keyword">true</span>; |
| <a name="l00152"></a>00152 <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="l00153"></a>00153 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> is_fair_mutex = <span class="keyword">true</span>; |
| <a name="l00154"></a>00154 |
| <a name="l00155"></a>00155 <span class="keyword">private</span>: |
| <a name="l00157"></a>00157 <a class="code" href="a00143.html">atomic<scoped_lock*></a> q_tail; |
| <a name="l00158"></a>00158 |
| <a name="l00159"></a>00159 }; |
| <a name="l00160"></a>00160 |
| <a name="l00161"></a>00161 __TBB_DEFINE_PROFILING_SET_NAME(queuing_rw_mutex) |
| <a name="l00162"></a>00162 |
| <a name="l00163"></a>00163 } <span class="comment">// namespace tbb</span> |
| <a name="l00164"></a>00164 |
| <a name="l00165"></a>00165 <span class="preprocessor">#endif </span><span class="comment">/* __TBB_queuing_rw_mutex_H */</span> |
| </pre></div><hr> |
| <p></p> |
| Copyright © 2005-2010 Intel Corporation. All Rights Reserved. |
| <p></p> |
| Intel, Pentium, Intel Xeon, Itanium, Intel XScale and VTune are |
| registered trademarks or trademarks of Intel Corporation or its |
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| <p></p> |
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