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<div class="title">parallel/compatibility.h</div> </div>
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<a href="a00810.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// -*- C++ -*-</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">// Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.</span>
<a name="l00004"></a>00004 <span class="comment">//</span>
<a name="l00005"></a>00005 <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span>
<a name="l00006"></a>00006 <span class="comment">// software; you can redistribute it and/or modify it under the terms</span>
<a name="l00007"></a>00007 <span class="comment">// of the GNU General Public License as published by the Free Software</span>
<a name="l00008"></a>00008 <span class="comment">// Foundation; either version 3, or (at your option) any later</span>
<a name="l00009"></a>00009 <span class="comment">// version.</span>
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="comment">// This library is distributed in the hope that it will be useful, but</span>
<a name="l00012"></a>00012 <span class="comment">// WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00014"></a>00014 <span class="comment">// General Public License for more details.</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span>
<a name="l00017"></a>00017 <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span>
<a name="l00018"></a>00018 <span class="comment">// 3.1, as published by the Free Software Foundation.</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="comment">// You should have received a copy of the GNU General Public License and</span>
<a name="l00021"></a>00021 <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span>
<a name="l00022"></a>00022 <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span>
<a name="l00023"></a>00023 <span class="comment">// <http://www.gnu.org/licenses/>.</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00025"></a>00025 <span class="comment">/** @file parallel/compatibility.h</span>
<a name="l00026"></a>00026 <span class="comment"> * @brief Compatibility layer, mostly concerned with atomic operations.</span>
<a name="l00027"></a>00027 <span class="comment"> * This file is a GNU parallel extension to the Standard C++ Library.</span>
<a name="l00028"></a>00028 <span class="comment"> */</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="comment">// Written by Felix Putze.</span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="preprocessor">#ifndef _GLIBCXX_PARALLEL_COMPATIBILITY_H</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor">#define _GLIBCXX_PARALLEL_COMPATIBILITY_H 1</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <<a class="code" href="a01096.html" title="Basic types and typedefs. This file is a GNU parallel extension to the Standard C++ Library...">parallel/types.h</a>></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include <<a class="code" href="a00764.html" title="Sequential helper functions. This file is a GNU parallel extension to the Standard C++ Library...">parallel/base.h</a>></span>
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="preprocessor">#if defined(__SUNPRO_CC) && defined(__sparc)</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span><span class="preprocessor">#include <sys/atomic.h></span>
<a name="l00040"></a>00040 <span class="preprocessor">#endif</span>
<a name="l00041"></a>00041 <span class="preprocessor"></span>
<a name="l00042"></a>00042 <span class="preprocessor">#if !defined(_WIN32) || defined (__CYGWIN__)</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span><span class="preprocessor">#include <sched.h></span>
<a name="l00044"></a>00044 <span class="preprocessor">#endif</span>
<a name="l00045"></a>00045 <span class="preprocessor"></span>
<a name="l00046"></a>00046 <span class="preprocessor">#if defined(_MSC_VER)</span>
<a name="l00047"></a>00047 <span class="preprocessor"></span><span class="preprocessor">#include <Windows.h></span>
<a name="l00048"></a>00048 <span class="preprocessor">#include <intrin.h></span>
<a name="l00049"></a>00049 <span class="preprocessor">#undef max</span>
<a name="l00050"></a>00050 <span class="preprocessor"></span><span class="preprocessor">#undef min</span>
<a name="l00051"></a>00051 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span>
<a name="l00053"></a>00053 <span class="preprocessor">#ifdef __MINGW32__</span>
<a name="l00054"></a>00054 <span class="preprocessor"></span><span class="comment">// Including <windows.h> will drag in all the windows32 names. Since</span>
<a name="l00055"></a>00055 <span class="comment">// that can cause user code portability problems, we just declare the</span>
<a name="l00056"></a>00056 <span class="comment">// one needed function here.</span>
<a name="l00057"></a>00057 <span class="keyword">extern</span> <span class="stringliteral">"C"</span>
<a name="l00058"></a>00058 __attribute((dllimport)) void __attribute__((stdcall)) Sleep (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>);
<a name="l00059"></a>00059 <span class="preprocessor">#endif</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span>
<a name="l00061"></a>00061 <span class="keyword">namespace </span>__gnu_parallel
<a name="l00062"></a>00062 {
<a name="l00063"></a>00063 <span class="preprocessor">#if defined(__ICC)</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _MustBeInt = <span class="keywordtype">int</span>>
<a name="l00065"></a>00065 int32_t __faa32(int32_t* __x, int32_t __inc)
<a name="l00066"></a>00066 {
<a name="l00067"></a>00067 <span class="keyword">asm</span> <span class="keyword">volatile</span>(<span class="stringliteral">"lock xadd %0,%1"</span>
<a name="l00068"></a>00068 : <span class="stringliteral">"=__r"</span> (__inc), <span class="stringliteral">"=__m"</span> (*__x)
<a name="l00069"></a>00069 : <span class="stringliteral">"0"</span> (__inc)
<a name="l00070"></a>00070 : <span class="stringliteral">"memory"</span>);
<a name="l00071"></a>00071 <span class="keywordflow">return</span> __inc;
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073 <span class="preprocessor">#if defined(__x86_64)</span>
<a name="l00074"></a>00074 <span class="preprocessor"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _MustBeInt = <span class="keywordtype">int</span>>
<a name="l00075"></a>00075 int64_t __faa64(int64_t* __x, int64_t __inc)
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077 <span class="keyword">asm</span> <span class="keyword">volatile</span>(<span class="stringliteral">"lock xadd %0,%1"</span>
<a name="l00078"></a>00078 : <span class="stringliteral">"=__r"</span> (__inc), <span class="stringliteral">"=__m"</span> (*__x)
<a name="l00079"></a>00079 : <span class="stringliteral">"0"</span> (__inc)
<a name="l00080"></a>00080 : <span class="stringliteral">"memory"</span>);
<a name="l00081"></a>00081 <span class="keywordflow">return</span> __inc;
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 <span class="preprocessor">#endif</span>
<a name="l00084"></a>00084 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00085"></a>00085 <span class="preprocessor"></span>
<a name="l00086"></a>00086 <span class="comment">// atomic functions only work on integers</span>
<a name="l00087"></a>00087 <span class="comment"></span>
<a name="l00088"></a>00088 <span class="comment"> /** @brief Add a value to a variable, atomically.</span>
<a name="l00089"></a>00089 <span class="comment"> *</span>
<a name="l00090"></a>00090 <span class="comment"> * Implementation is heavily platform-dependent.</span>
<a name="l00091"></a>00091 <span class="comment"> * @param __ptr Pointer to a 32-bit signed integer.</span>
<a name="l00092"></a>00092 <span class="comment"> * @param __addend Value to add.</span>
<a name="l00093"></a>00093 <span class="comment"> */</span>
<a name="l00094"></a>00094 <span class="keyword">inline</span> int32_t
<a name="l00095"></a><a class="code" href="a01131.html#a0ecb7402bccd099b51c28bcc64d57b68">00095</a> <a class="code" href="a01131.html#a0ecb7402bccd099b51c28bcc64d57b68" title="Add a value to a variable, atomically.">__fetch_and_add_32</a>(<span class="keyword">volatile</span> int32_t* __ptr, int32_t __addend)
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 <span class="preprocessor">#if defined(__ICC) //x86 version</span>
<a name="l00098"></a>00098 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedExchangeAdd((<span class="keywordtype">void</span>*)__ptr, __addend);
<a name="l00099"></a>00099 <span class="preprocessor">#elif defined(__ECC) //IA-64 version</span>
<a name="l00100"></a>00100 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedExchangeAdd((<span class="keywordtype">void</span>*)__ptr, __addend);
<a name="l00101"></a>00101 <span class="preprocessor">#elif defined(__ICL) || defined(_MSC_VER)</span>
<a name="l00102"></a>00102 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedExchangeAdd(reinterpret_cast<volatile long*>(__ptr),
<a name="l00103"></a>00103 __addend);
<a name="l00104"></a>00104 <span class="preprocessor">#elif defined(__GNUC__)</span>
<a name="l00105"></a>00105 <span class="preprocessor"></span> <span class="keywordflow">return</span> __sync_fetch_and_add(__ptr, __addend);
<a name="l00106"></a>00106 <span class="preprocessor">#elif defined(__SUNPRO_CC) && defined(__sparc)</span>
<a name="l00107"></a>00107 <span class="preprocessor"></span> <span class="keyword">volatile</span> int32_t __before, __after;
<a name="l00108"></a>00108 <span class="keywordflow">do</span>
<a name="l00109"></a>00109 {
<a name="l00110"></a>00110 __before = *__ptr;
<a name="l00111"></a>00111 __after = __before + __addend;
<a name="l00112"></a>00112 } <span class="keywordflow">while</span> (atomic_cas_32((<span class="keyword">volatile</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>*)__ptr, __before,
<a name="l00113"></a>00113 __after) != __before);
<a name="l00114"></a>00114 <span class="keywordflow">return</span> __before;
<a name="l00115"></a>00115 <span class="preprocessor">#else //fallback, slow</span>
<a name="l00116"></a>00116 <span class="preprocessor"></span><span class="preprocessor">#pragma message("slow __fetch_and_add_32")</span>
<a name="l00117"></a>00117 <span class="preprocessor"></span> int32_t __res;
<a name="l00118"></a>00118 <span class="preprocessor">#pragma omp critical</span>
<a name="l00119"></a>00119 <span class="preprocessor"></span> {
<a name="l00120"></a>00120 __res = *__ptr;
<a name="l00121"></a>00121 *(__ptr) += __addend;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123 <span class="keywordflow">return</span> __res;
<a name="l00124"></a>00124 <span class="preprocessor">#endif</span>
<a name="l00125"></a>00125 <span class="preprocessor"></span> }
<a name="l00126"></a>00126 <span class="comment"></span>
<a name="l00127"></a>00127 <span class="comment"> /** @brief Add a value to a variable, atomically.</span>
<a name="l00128"></a>00128 <span class="comment"> *</span>
<a name="l00129"></a>00129 <span class="comment"> * Implementation is heavily platform-dependent.</span>
<a name="l00130"></a>00130 <span class="comment"> * @param __ptr Pointer to a 64-bit signed integer.</span>
<a name="l00131"></a>00131 <span class="comment"> * @param __addend Value to add.</span>
<a name="l00132"></a>00132 <span class="comment"> */</span>
<a name="l00133"></a>00133 <span class="keyword">inline</span> int64_t
<a name="l00134"></a><a class="code" href="a01131.html#aa87fd421e9f75ac83103ea48fabfa77f">00134</a> <a class="code" href="a01131.html#aa87fd421e9f75ac83103ea48fabfa77f" title="Add a value to a variable, atomically.">__fetch_and_add_64</a>(<span class="keyword">volatile</span> int64_t* __ptr, int64_t __addend)
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 <span class="preprocessor">#if defined(__ICC) && defined(__x86_64) //x86 version</span>
<a name="l00137"></a>00137 <span class="preprocessor"></span> <span class="keywordflow">return</span> __faa64<int>((int64_t*)__ptr, __addend);
<a name="l00138"></a>00138 <span class="preprocessor">#elif defined(__ECC) //IA-64 version</span>
<a name="l00139"></a>00139 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedExchangeAdd64((<span class="keywordtype">void</span>*)__ptr, __addend);
<a name="l00140"></a>00140 <span class="preprocessor">#elif defined(__ICL) || defined(_MSC_VER)</span>
<a name="l00141"></a>00141 <span class="preprocessor"></span><span class="preprocessor">#ifndef _WIN64</span>
<a name="l00142"></a>00142 <span class="preprocessor"></span> _GLIBCXX_PARALLEL_ASSERT(<span class="keyword">false</span>); <span class="comment">//not available in this case</span>
<a name="l00143"></a>00143 <span class="keywordflow">return</span> 0;
<a name="l00144"></a>00144 <span class="preprocessor">#else</span>
<a name="l00145"></a>00145 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedExchangeAdd64(__ptr, __addend);
<a name="l00146"></a>00146 <span class="preprocessor">#endif</span>
<a name="l00147"></a>00147 <span class="preprocessor"></span><span class="preprocessor">#elif defined(__GNUC__) && defined(__x86_64)</span>
<a name="l00148"></a>00148 <span class="preprocessor"></span> <span class="keywordflow">return</span> __sync_fetch_and_add(__ptr, __addend);
<a name="l00149"></a>00149 <span class="preprocessor">#elif defined(__GNUC__) && defined(__i386) && \</span>
<a name="l00150"></a>00150 <span class="preprocessor"> (defined(__i686) || defined(__pentium4) || defined(__athlon) \</span>
<a name="l00151"></a>00151 <span class="preprocessor"> || defined(__k8) || defined(__core2))</span>
<a name="l00152"></a>00152 <span class="preprocessor"></span> <span class="keywordflow">return</span> __sync_fetch_and_add(__ptr, __addend);
<a name="l00153"></a>00153 <span class="preprocessor">#elif defined(__SUNPRO_CC) && defined(__sparc)</span>
<a name="l00154"></a>00154 <span class="preprocessor"></span> <span class="keyword">volatile</span> int64_t __before, __after;
<a name="l00155"></a>00155 <span class="keywordflow">do</span>
<a name="l00156"></a>00156 {
<a name="l00157"></a>00157 __before = *__ptr;
<a name="l00158"></a>00158 __after = __before + __addend;
<a name="l00159"></a>00159 } <span class="keywordflow">while</span> (atomic_cas_64((<span class="keyword">volatile</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>*)__ptr, __before,
<a name="l00160"></a>00160 __after) != __before);
<a name="l00161"></a>00161 <span class="keywordflow">return</span> __before;
<a name="l00162"></a>00162 <span class="preprocessor">#else //fallback, slow</span>
<a name="l00163"></a>00163 <span class="preprocessor"></span><span class="preprocessor">#if defined(__GNUC__) && defined(__i386)</span>
<a name="l00164"></a>00164 <span class="preprocessor"></span> <span class="comment">// XXX doesn'__t work with -march=native</span>
<a name="l00165"></a>00165 <span class="comment">//#warning "please compile with -march=i686 or better"</span>
<a name="l00166"></a>00166 <span class="preprocessor">#endif</span>
<a name="l00167"></a>00167 <span class="preprocessor"></span><span class="preprocessor">#pragma message("slow __fetch_and_add_64")</span>
<a name="l00168"></a>00168 <span class="preprocessor"></span> int64_t __res;
<a name="l00169"></a>00169 <span class="preprocessor">#pragma omp critical</span>
<a name="l00170"></a>00170 <span class="preprocessor"></span> {
<a name="l00171"></a>00171 __res = *__ptr;
<a name="l00172"></a>00172 *(__ptr) += __addend;
<a name="l00173"></a>00173 }
<a name="l00174"></a>00174 <span class="keywordflow">return</span> __res;
<a name="l00175"></a>00175 <span class="preprocessor">#endif</span>
<a name="l00176"></a>00176 <span class="preprocessor"></span> }
<a name="l00177"></a>00177 <span class="comment"></span>
<a name="l00178"></a>00178 <span class="comment"> /** @brief Add a value to a variable, atomically.</span>
<a name="l00179"></a>00179 <span class="comment"> *</span>
<a name="l00180"></a>00180 <span class="comment"> * Implementation is heavily platform-dependent.</span>
<a name="l00181"></a>00181 <span class="comment"> * @param __ptr Pointer to a signed integer.</span>
<a name="l00182"></a>00182 <span class="comment"> * @param __addend Value to add.</span>
<a name="l00183"></a>00183 <span class="comment"> */</span>
<a name="l00184"></a>00184 <span class="keyword">template</span><<span class="keyword">typename</span> _Tp>
<a name="l00185"></a>00185 <span class="keyword">inline</span> _Tp
<a name="l00186"></a><a class="code" href="a01131.html#a5516e521b2a1e71887717b4265b1e5ca">00186</a> <a class="code" href="a01131.html#a5516e521b2a1e71887717b4265b1e5ca" title="Add a value to a variable, atomically.">__fetch_and_add</a>(<span class="keyword">volatile</span> _Tp* __ptr, _Tp __addend)
<a name="l00187"></a>00187 {
<a name="l00188"></a>00188 <span class="keywordflow">if</span> (<span class="keyword">sizeof</span>(_Tp) == <span class="keyword">sizeof</span>(int32_t))
<a name="l00189"></a>00189 <span class="keywordflow">return</span>
<a name="l00190"></a>00190 (_Tp)<a class="code" href="a01131.html#a0ecb7402bccd099b51c28bcc64d57b68" title="Add a value to a variable, atomically.">__fetch_and_add_32</a>((<span class="keyword">volatile</span> int32_t*) __ptr, (int32_t)__addend);
<a name="l00191"></a>00191 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">sizeof</span>(_Tp) == <span class="keyword">sizeof</span>(int64_t))
<a name="l00192"></a>00192 <span class="keywordflow">return</span>
<a name="l00193"></a>00193 (_Tp)<a class="code" href="a01131.html#aa87fd421e9f75ac83103ea48fabfa77f" title="Add a value to a variable, atomically.">__fetch_and_add_64</a>((<span class="keyword">volatile</span> int64_t*) __ptr, (int64_t)__addend);
<a name="l00194"></a>00194 <span class="keywordflow">else</span>
<a name="l00195"></a>00195 _GLIBCXX_PARALLEL_ASSERT(<span class="keyword">false</span>);
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197
<a name="l00198"></a>00198
<a name="l00199"></a>00199 <span class="preprocessor">#if defined(__ICC)</span>
<a name="l00200"></a>00200 <span class="preprocessor"></span>
<a name="l00201"></a>00201 <span class="keyword">template</span><<span class="keyword">typename</span> _MustBeInt = <span class="keywordtype">int</span>>
<a name="l00202"></a>00202 <span class="keyword">inline</span> int32_t
<a name="l00203"></a>00203 __cas32(<span class="keyword">volatile</span> int32_t* __ptr, int32_t __old, int32_t __nw)
<a name="l00204"></a>00204 {
<a name="l00205"></a>00205 int32_t __before;
<a name="l00206"></a>00206 __asm__ __volatile__(<span class="stringliteral">"lock; cmpxchgl %1,%2"</span>
<a name="l00207"></a>00207 : <span class="stringliteral">"=a"</span>(__before)
<a name="l00208"></a>00208 : <span class="stringliteral">"q"</span>(__nw), <span class="stringliteral">"__m"</span>(*(<span class="keyword">volatile</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>*)(__ptr)),
<a name="l00209"></a>00209 <span class="stringliteral">"0"</span>(__old)
<a name="l00210"></a>00210 : <span class="stringliteral">"memory"</span>);
<a name="l00211"></a>00211 <span class="keywordflow">return</span> __before;
<a name="l00212"></a>00212 }
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="preprocessor">#if defined(__x86_64)</span>
<a name="l00215"></a>00215 <span class="preprocessor"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _MustBeInt = <span class="keywordtype">int</span>>
<a name="l00216"></a>00216 <span class="keyword">inline</span> int64_t
<a name="l00217"></a>00217 __cas64(<span class="keyword">volatile</span> int64_t *__ptr, int64_t __old, int64_t __nw)
<a name="l00218"></a>00218 {
<a name="l00219"></a>00219 int64_t __before;
<a name="l00220"></a>00220 __asm__ __volatile__(<span class="stringliteral">"lock; cmpxchgq %1,%2"</span>
<a name="l00221"></a>00221 : <span class="stringliteral">"=a"</span>(__before)
<a name="l00222"></a>00222 : <span class="stringliteral">"q"</span>(__nw), <span class="stringliteral">"__m"</span>(*(<span class="keyword">volatile</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>*)(__ptr)),
<a name="l00223"></a>00223 <span class="stringliteral">"0"</span>(__old)
<a name="l00224"></a>00224 : <span class="stringliteral">"memory"</span>);
<a name="l00225"></a>00225 <span class="keywordflow">return</span> __before;
<a name="l00226"></a>00226 }
<a name="l00227"></a>00227 <span class="preprocessor">#endif</span>
<a name="l00228"></a>00228 <span class="preprocessor"></span>
<a name="l00229"></a>00229 <span class="preprocessor">#endif</span>
<a name="l00230"></a>00230 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00231"></a>00231 <span class="comment"> /** @brief Compare @c *__ptr and @c __comparand. If equal, let @c</span>
<a name="l00232"></a>00232 <span class="comment"> * *__ptr=__replacement and return @c true, return @c false otherwise.</span>
<a name="l00233"></a>00233 <span class="comment"> *</span>
<a name="l00234"></a>00234 <span class="comment"> * Implementation is heavily platform-dependent.</span>
<a name="l00235"></a>00235 <span class="comment"> * @param __ptr Pointer to 32-bit signed integer.</span>
<a name="l00236"></a>00236 <span class="comment"> * @param __comparand Compare value.</span>
<a name="l00237"></a>00237 <span class="comment"> * @param __replacement Replacement value.</span>
<a name="l00238"></a>00238 <span class="comment"> */</span>
<a name="l00239"></a>00239 <span class="keyword">inline</span> <span class="keywordtype">bool</span>
<a name="l00240"></a><a class="code" href="a01131.html#ab6820de0a0aa43aaf0d1fd22548c7f91">00240</a> <a class="code" href="a01131.html#ab6820de0a0aa43aaf0d1fd22548c7f91" title="Compare *__ptr and __comparand. If equal, let *__ptr=__replacement and return true, return false otherwise.">__compare_and_swap_32</a>(<span class="keyword">volatile</span> int32_t* __ptr, int32_t __comparand,
<a name="l00241"></a>00241 int32_t __replacement)
<a name="l00242"></a>00242 {
<a name="l00243"></a>00243 <span class="preprocessor">#if defined(__ICC) //x86 version</span>
<a name="l00244"></a>00244 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedCompareExchange((<span class="keywordtype">void</span>*)__ptr, __replacement,
<a name="l00245"></a>00245 __comparand) == __comparand;
<a name="l00246"></a>00246 <span class="preprocessor">#elif defined(__ECC) //IA-64 version</span>
<a name="l00247"></a>00247 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedCompareExchange((<span class="keywordtype">void</span>*)__ptr, __replacement,
<a name="l00248"></a>00248 __comparand) == __comparand;
<a name="l00249"></a>00249 <span class="preprocessor">#elif defined(__ICL) || defined(_MSC_VER)</span>
<a name="l00250"></a>00250 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedCompareExchange(
<a name="l00251"></a>00251 reinterpret_cast<volatile long*>(__ptr),
<a name="l00252"></a>00252 __replacement, __comparand)
<a name="l00253"></a>00253 == __comparand;
<a name="l00254"></a>00254 <span class="preprocessor">#elif defined(__GNUC__)</span>
<a name="l00255"></a>00255 <span class="preprocessor"></span> <span class="keywordflow">return</span> __sync_bool_compare_and_swap(__ptr, __comparand, __replacement);
<a name="l00256"></a>00256 <span class="preprocessor">#elif defined(__SUNPRO_CC) && defined(__sparc)</span>
<a name="l00257"></a>00257 <span class="preprocessor"></span> <span class="keywordflow">return</span> atomic_cas_32((<span class="keyword">volatile</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>*)__ptr, __comparand,
<a name="l00258"></a>00258 __replacement) == __comparand;
<a name="l00259"></a>00259 <span class="preprocessor">#else</span>
<a name="l00260"></a>00260 <span class="preprocessor"></span><span class="preprocessor">#pragma message("slow __compare_and_swap_32")</span>
<a name="l00261"></a>00261 <span class="preprocessor"></span> <span class="keywordtype">bool</span> __res = <span class="keyword">false</span>;
<a name="l00262"></a>00262 <span class="preprocessor">#pragma omp critical</span>
<a name="l00263"></a>00263 <span class="preprocessor"></span> {
<a name="l00264"></a>00264 <span class="keywordflow">if</span> (*__ptr == __comparand)
<a name="l00265"></a>00265 {
<a name="l00266"></a>00266 *__ptr = __replacement;
<a name="l00267"></a>00267 __res = <span class="keyword">true</span>;
<a name="l00268"></a>00268 }
<a name="l00269"></a>00269 }
<a name="l00270"></a>00270 <span class="keywordflow">return</span> __res;
<a name="l00271"></a>00271 <span class="preprocessor">#endif</span>
<a name="l00272"></a>00272 <span class="preprocessor"></span> }
<a name="l00273"></a>00273 <span class="comment"></span>
<a name="l00274"></a>00274 <span class="comment"> /** @brief Compare @c *__ptr and @c __comparand. If equal, let @c</span>
<a name="l00275"></a>00275 <span class="comment"> * *__ptr=__replacement and return @c true, return @c false otherwise.</span>
<a name="l00276"></a>00276 <span class="comment"> *</span>
<a name="l00277"></a>00277 <span class="comment"> * Implementation is heavily platform-dependent.</span>
<a name="l00278"></a>00278 <span class="comment"> * @param __ptr Pointer to 64-bit signed integer.</span>
<a name="l00279"></a>00279 <span class="comment"> * @param __comparand Compare value.</span>
<a name="l00280"></a>00280 <span class="comment"> * @param __replacement Replacement value.</span>
<a name="l00281"></a>00281 <span class="comment"> */</span>
<a name="l00282"></a>00282 <span class="keyword">inline</span> <span class="keywordtype">bool</span>
<a name="l00283"></a><a class="code" href="a01131.html#a412037b996221c3b30b6771ffda31ef7">00283</a> <a class="code" href="a01131.html#a412037b996221c3b30b6771ffda31ef7" title="Compare *__ptr and __comparand. If equal, let *__ptr=__replacement and return true, return false otherwise.">__compare_and_swap_64</a>(<span class="keyword">volatile</span> int64_t* __ptr, int64_t __comparand,
<a name="l00284"></a>00284 int64_t __replacement)
<a name="l00285"></a>00285 {
<a name="l00286"></a>00286 <span class="preprocessor">#if defined(__ICC) && defined(__x86_64) //x86 version</span>
<a name="l00287"></a>00287 <span class="preprocessor"></span> <span class="keywordflow">return</span> __cas64<int>(__ptr, __comparand, __replacement) == __comparand;
<a name="l00288"></a>00288 <span class="preprocessor">#elif defined(__ECC) //IA-64 version</span>
<a name="l00289"></a>00289 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedCompareExchange64((<span class="keywordtype">void</span>*)__ptr, __replacement,
<a name="l00290"></a>00290 __comparand) == __comparand;
<a name="l00291"></a>00291 <span class="preprocessor">#elif defined(__ICL) || defined(_MSC_VER)</span>
<a name="l00292"></a>00292 <span class="preprocessor"></span><span class="preprocessor">#ifndef _WIN64</span>
<a name="l00293"></a>00293 <span class="preprocessor"></span> _GLIBCXX_PARALLEL_ASSERT(<span class="keyword">false</span>); <span class="comment">//not available in this case</span>
<a name="l00294"></a>00294 <span class="keywordflow">return</span> 0;
<a name="l00295"></a>00295 <span class="preprocessor">#else</span>
<a name="l00296"></a>00296 <span class="preprocessor"></span> <span class="keywordflow">return</span> _InterlockedCompareExchange64(__ptr, __replacement,
<a name="l00297"></a>00297 __comparand) == __comparand;
<a name="l00298"></a>00298 <span class="preprocessor">#endif</span>
<a name="l00299"></a>00299 <span class="preprocessor"></span>
<a name="l00300"></a>00300 <span class="preprocessor">#elif defined(__GNUC__) && defined(__x86_64)</span>
<a name="l00301"></a>00301 <span class="preprocessor"></span> <span class="keywordflow">return</span> __sync_bool_compare_and_swap(__ptr, __comparand, __replacement);
<a name="l00302"></a>00302 <span class="preprocessor">#elif defined(__GNUC__) && defined(__i386) && \</span>
<a name="l00303"></a>00303 <span class="preprocessor"> (defined(__i686) || defined(__pentium4) || defined(__athlon) \</span>
<a name="l00304"></a>00304 <span class="preprocessor"> || defined(__k8) || defined(__core2))</span>
<a name="l00305"></a>00305 <span class="preprocessor"></span> <span class="keywordflow">return</span> __sync_bool_compare_and_swap(__ptr, __comparand, __replacement);
<a name="l00306"></a>00306 <span class="preprocessor">#elif defined(__SUNPRO_CC) && defined(__sparc)</span>
<a name="l00307"></a>00307 <span class="preprocessor"></span> <span class="keywordflow">return</span> atomic_cas_64((<span class="keyword">volatile</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>*)__ptr,
<a name="l00308"></a>00308 __comparand, __replacement) == __comparand;
<a name="l00309"></a>00309 <span class="preprocessor">#else</span>
<a name="l00310"></a>00310 <span class="preprocessor"></span><span class="preprocessor">#if defined(__GNUC__) && defined(__i386)</span>
<a name="l00311"></a>00311 <span class="preprocessor"></span> <span class="comment">// XXX -march=native</span>
<a name="l00312"></a>00312 <span class="comment">//#warning "please compile with -march=i686 or better"</span>
<a name="l00313"></a>00313 <span class="preprocessor">#endif</span>
<a name="l00314"></a>00314 <span class="preprocessor"></span><span class="preprocessor">#pragma message("slow __compare_and_swap_64")</span>
<a name="l00315"></a>00315 <span class="preprocessor"></span> <span class="keywordtype">bool</span> __res = <span class="keyword">false</span>;
<a name="l00316"></a>00316 <span class="preprocessor">#pragma omp critical</span>
<a name="l00317"></a>00317 <span class="preprocessor"></span> {
<a name="l00318"></a>00318 <span class="keywordflow">if</span> (*__ptr == __comparand)
<a name="l00319"></a>00319 {
<a name="l00320"></a>00320 *__ptr = __replacement;
<a name="l00321"></a>00321 __res = <span class="keyword">true</span>;
<a name="l00322"></a>00322 }
<a name="l00323"></a>00323 }
<a name="l00324"></a>00324 <span class="keywordflow">return</span> __res;
<a name="l00325"></a>00325 <span class="preprocessor">#endif</span>
<a name="l00326"></a>00326 <span class="preprocessor"></span> }
<a name="l00327"></a>00327 <span class="comment"></span>
<a name="l00328"></a>00328 <span class="comment"> /** @brief Compare @c *__ptr and @c __comparand. If equal, let @c</span>
<a name="l00329"></a>00329 <span class="comment"> * *__ptr=__replacement and return @c true, return @c false otherwise.</span>
<a name="l00330"></a>00330 <span class="comment"> *</span>
<a name="l00331"></a>00331 <span class="comment"> * Implementation is heavily platform-dependent.</span>
<a name="l00332"></a>00332 <span class="comment"> * @param __ptr Pointer to signed integer.</span>
<a name="l00333"></a>00333 <span class="comment"> * @param __comparand Compare value.</span>
<a name="l00334"></a>00334 <span class="comment"> * @param __replacement Replacement value. */</span>
<a name="l00335"></a>00335 <span class="keyword">template</span><<span class="keyword">typename</span> _Tp>
<a name="l00336"></a>00336 <span class="keyword">inline</span> <span class="keywordtype">bool</span>
<a name="l00337"></a><a class="code" href="a01131.html#a2bcca19758de5e8dce25e4137acf778b">00337</a> <a class="code" href="a01131.html#a2bcca19758de5e8dce25e4137acf778b" title="Compare *__ptr and __comparand. If equal, let *__ptr=__replacement and return true, return false otherwise.">__compare_and_swap</a>(<span class="keyword">volatile</span> _Tp* __ptr, _Tp __comparand, _Tp __replacement)
<a name="l00338"></a>00338 {
<a name="l00339"></a>00339 <span class="keywordflow">if</span> (<span class="keyword">sizeof</span>(_Tp) == <span class="keyword">sizeof</span>(int32_t))
<a name="l00340"></a>00340 <span class="keywordflow">return</span> <a class="code" href="a01131.html#ab6820de0a0aa43aaf0d1fd22548c7f91" title="Compare *__ptr and __comparand. If equal, let *__ptr=__replacement and return true, return false otherwise.">__compare_and_swap_32</a>((<span class="keyword">volatile</span> int32_t*) __ptr,
<a name="l00341"></a>00341 (int32_t)__comparand,
<a name="l00342"></a>00342 (int32_t)__replacement);
<a name="l00343"></a>00343 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">sizeof</span>(_Tp) == <span class="keyword">sizeof</span>(int64_t))
<a name="l00344"></a>00344 <span class="keywordflow">return</span> <a class="code" href="a01131.html#a412037b996221c3b30b6771ffda31ef7" title="Compare *__ptr and __comparand. If equal, let *__ptr=__replacement and return true, return false otherwise.">__compare_and_swap_64</a>((<span class="keyword">volatile</span> int64_t*) __ptr,
<a name="l00345"></a>00345 (int64_t)__comparand,
<a name="l00346"></a>00346 (int64_t)__replacement);
<a name="l00347"></a>00347 <span class="keywordflow">else</span>
<a name="l00348"></a>00348 _GLIBCXX_PARALLEL_ASSERT(<span class="keyword">false</span>);
<a name="l00349"></a>00349 }
<a name="l00350"></a>00350 <span class="comment"></span>
<a name="l00351"></a>00351 <span class="comment"> /** @brief Yield the control to another thread, without waiting for</span>
<a name="l00352"></a>00352 <span class="comment"> the end to the time slice. */</span>
<a name="l00353"></a>00353 <span class="keyword">inline</span> <span class="keywordtype">void</span>
<a name="l00354"></a><a class="code" href="a01131.html#aaa76236af73146ae89f726921bc3f2cb">00354</a> <a class="code" href="a01131.html#aaa76236af73146ae89f726921bc3f2cb" title="Yield the control to another thread, without waiting for the end to the time slice.">__yield</a>()
<a name="l00355"></a>00355 {
<a name="l00356"></a>00356 <span class="preprocessor">#if defined (_WIN32) && !defined (__CYGWIN__)</span>
<a name="l00357"></a>00357 <span class="preprocessor"></span> Sleep(0);
<a name="l00358"></a>00358 <span class="preprocessor">#else</span>
<a name="l00359"></a>00359 <span class="preprocessor"></span> sched_yield();
<a name="l00360"></a>00360 <span class="preprocessor">#endif</span>
<a name="l00361"></a>00361 <span class="preprocessor"></span> }
<a name="l00362"></a>00362 } <span class="comment">// end namespace</span>
<a name="l00363"></a>00363
<a name="l00364"></a>00364 <span class="preprocessor">#endif </span><span class="comment">/* _GLIBCXX_PARALLEL_COMPATIBILITY_H */</span>
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