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<div class="title">concurrence.h</div> </div>
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<a href="a00816.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Support for concurrent programing -*- C++ -*-</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010</span>
<a name="l00004"></a>00004 <span class="comment">// Free Software Foundation, Inc.</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span>
<a name="l00007"></a>00007 <span class="comment">// software; you can redistribute it and/or modify it under the</span>
<a name="l00008"></a>00008 <span class="comment">// terms of the GNU General Public License as published by the</span>
<a name="l00009"></a>00009 <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span>
<a name="l00010"></a>00010 <span class="comment">// any later version.</span>
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <span class="comment">// This library is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00015"></a>00015 <span class="comment">// GNU General Public License for more details.</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span>
<a name="l00018"></a>00018 <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span>
<a name="l00019"></a>00019 <span class="comment">// 3.1, as published by the Free Software Foundation.</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="comment">// You should have received a copy of the GNU General Public License and</span>
<a name="l00022"></a>00022 <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span>
<a name="l00023"></a>00023 <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span>
<a name="l00024"></a>00024 <span class="comment">// <http://www.gnu.org/licenses/>.</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">/** @file ext/concurrence.h</span>
<a name="l00027"></a>00027 <span class="comment"> * This file is a GNU 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="preprocessor">#ifndef _CONCURRENCE_H</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#define _CONCURRENCE_H 1</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span>
<a name="l00033"></a>00033 <span class="preprocessor">#pragma GCC system_header</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <<a class="code" href="a00863.html">exception</a>></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include <bits/gthr.h></span>
<a name="l00037"></a>00037 <span class="preprocessor">#include <<a class="code" href="a00883.html">bits/functexcept.h</a>></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include <<a class="code" href="a00821.html">bits/cpp_type_traits.h</a>></span>
<a name="l00039"></a>00039 <span class="preprocessor">#include <<a class="code" href="a01091.html">ext/type_traits.h</a>></span>
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="keyword">namespace </span>__gnu_cxx _GLIBCXX_VISIBILITY(default)
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 _GLIBCXX_BEGIN_NAMESPACE_VERSION
<a name="l00044"></a>00044
<a name="l00045"></a>00045 <span class="comment">// Available locking policies:</span>
<a name="l00046"></a>00046 <span class="comment">// _S_single single-threaded code that doesn't need to be locked.</span>
<a name="l00047"></a>00047 <span class="comment">// _S_mutex multi-threaded code that requires additional support</span>
<a name="l00048"></a>00048 <span class="comment">// from gthr.h or abstraction layers in concurrence.h.</span>
<a name="l00049"></a>00049 <span class="comment">// _S_atomic multi-threaded code using atomic operations.</span>
<a name="l00050"></a>00050 <span class="keyword">enum</span> _Lock_policy { _S_single, _S_mutex, _S_atomic };
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="comment">// Compile time constant that indicates prefered locking policy in</span>
<a name="l00053"></a>00053 <span class="comment">// the current configuration.</span>
<a name="l00054"></a>00054 <span class="keyword">static</span> <span class="keyword">const</span> _Lock_policy __default_lock_policy =
<a name="l00055"></a>00055 <span class="preprocessor">#ifdef __GTHREADS</span>
<a name="l00056"></a>00056 <span class="preprocessor"></span><span class="preprocessor">#if (defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2) \</span>
<a name="l00057"></a>00057 <span class="preprocessor"> && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4))</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span> _S_atomic;
<a name="l00059"></a>00059 <span class="preprocessor">#else</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span> _S_mutex;
<a name="l00061"></a>00061 <span class="preprocessor">#endif</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span> _S_single;
<a name="l00064"></a>00064 <span class="preprocessor">#endif</span>
<a name="l00065"></a>00065 <span class="preprocessor"></span>
<a name="l00066"></a>00066 <span class="comment">// NB: As this is used in libsupc++, need to only depend on</span>
<a name="l00067"></a>00067 <span class="comment">// exception. No stdexception classes, no use of std::string.</span>
<a name="l00068"></a>00068 <span class="keyword">class </span>__concurrence_lock_error : <span class="keyword">public</span> std::exception
<a name="l00069"></a>00069 {
<a name="l00070"></a>00070 <span class="keyword">public</span>:
<a name="l00071"></a>00071 <span class="keyword">virtual</span> <span class="keywordtype">char</span> <span class="keyword">const</span>*
<a name="l00072"></a>00072 what() <span class="keyword">const</span> throw()
<a name="l00073"></a>00073 { <span class="keywordflow">return</span> <span class="stringliteral">"__gnu_cxx::__concurrence_lock_error"</span>; }
<a name="l00074"></a>00074 };
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="keyword">class </span>__concurrence_unlock_error : <span class="keyword">public</span> std::exception
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 <span class="keyword">public</span>:
<a name="l00079"></a>00079 <span class="keyword">virtual</span> <span class="keywordtype">char</span> <span class="keyword">const</span>*
<a name="l00080"></a>00080 what() <span class="keyword">const</span> throw()
<a name="l00081"></a>00081 { <span class="keywordflow">return</span> <span class="stringliteral">"__gnu_cxx::__concurrence_unlock_error"</span>; }
<a name="l00082"></a>00082 };
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="keyword">class </span>__concurrence_broadcast_error : <span class="keyword">public</span> std::exception
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 <span class="keyword">public</span>:
<a name="l00087"></a>00087 <span class="keyword">virtual</span> <span class="keywordtype">char</span> <span class="keyword">const</span>*
<a name="l00088"></a>00088 what() <span class="keyword">const</span> throw()
<a name="l00089"></a>00089 { <span class="keywordflow">return</span> <span class="stringliteral">"__gnu_cxx::__concurrence_broadcast_error"</span>; }
<a name="l00090"></a>00090 };
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="keyword">class </span>__concurrence_wait_error : <span class="keyword">public</span> std::exception
<a name="l00093"></a>00093 {
<a name="l00094"></a>00094 <span class="keyword">public</span>:
<a name="l00095"></a>00095 <span class="keyword">virtual</span> <span class="keywordtype">char</span> <span class="keyword">const</span>*
<a name="l00096"></a>00096 what() <span class="keyword">const</span> throw()
<a name="l00097"></a>00097 { <span class="keywordflow">return</span> <span class="stringliteral">"__gnu_cxx::__concurrence_wait_error"</span>; }
<a name="l00098"></a>00098 };
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="comment">// Substitute for concurrence_error object in the case of -fno-exceptions.</span>
<a name="l00101"></a>00101 <span class="keyword">inline</span> <span class="keywordtype">void</span>
<a name="l00102"></a>00102 __throw_concurrence_lock_error()
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 <span class="preprocessor">#if __EXCEPTIONS</span>
<a name="l00105"></a>00105 <span class="preprocessor"></span> <span class="keywordflow">throw</span> __concurrence_lock_error();
<a name="l00106"></a>00106 <span class="preprocessor">#else</span>
<a name="l00107"></a>00107 <span class="preprocessor"></span> __builtin_abort();
<a name="l00108"></a>00108 <span class="preprocessor">#endif</span>
<a name="l00109"></a>00109 <span class="preprocessor"></span> }
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="keyword">inline</span> <span class="keywordtype">void</span>
<a name="l00112"></a>00112 __throw_concurrence_unlock_error()
<a name="l00113"></a>00113 {
<a name="l00114"></a>00114 <span class="preprocessor">#if __EXCEPTIONS</span>
<a name="l00115"></a>00115 <span class="preprocessor"></span> <span class="keywordflow">throw</span> __concurrence_unlock_error();
<a name="l00116"></a>00116 <span class="preprocessor">#else</span>
<a name="l00117"></a>00117 <span class="preprocessor"></span> __builtin_abort();
<a name="l00118"></a>00118 <span class="preprocessor">#endif</span>
<a name="l00119"></a>00119 <span class="preprocessor"></span> }
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="preprocessor">#ifdef __GTHREAD_HAS_COND</span>
<a name="l00122"></a>00122 <span class="preprocessor"></span> <span class="keyword">inline</span> <span class="keywordtype">void</span>
<a name="l00123"></a>00123 __throw_concurrence_broadcast_error()
<a name="l00124"></a>00124 {
<a name="l00125"></a>00125 <span class="preprocessor">#if __EXCEPTIONS</span>
<a name="l00126"></a>00126 <span class="preprocessor"></span> <span class="keywordflow">throw</span> __concurrence_broadcast_error();
<a name="l00127"></a>00127 <span class="preprocessor">#else</span>
<a name="l00128"></a>00128 <span class="preprocessor"></span> __builtin_abort();
<a name="l00129"></a>00129 <span class="preprocessor">#endif</span>
<a name="l00130"></a>00130 <span class="preprocessor"></span> }
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="keyword">inline</span> <span class="keywordtype">void</span>
<a name="l00133"></a>00133 __throw_concurrence_wait_error()
<a name="l00134"></a>00134 {
<a name="l00135"></a>00135 <span class="preprocessor">#if __EXCEPTIONS</span>
<a name="l00136"></a>00136 <span class="preprocessor"></span> <span class="keywordflow">throw</span> __concurrence_wait_error();
<a name="l00137"></a>00137 <span class="preprocessor">#else</span>
<a name="l00138"></a>00138 <span class="preprocessor"></span> __builtin_abort();
<a name="l00139"></a>00139 <span class="preprocessor">#endif</span>
<a name="l00140"></a>00140 <span class="preprocessor"></span> }
<a name="l00141"></a>00141 <span class="preprocessor">#endif</span>
<a name="l00142"></a>00142 <span class="preprocessor"></span>
<a name="l00143"></a>00143 <span class="keyword">class </span>__mutex
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145 <span class="keyword">private</span>:
<a name="l00146"></a>00146 __gthread_mutex_t _M_mutex;
<a name="l00147"></a>00147
<a name="l00148"></a>00148 __mutex(<span class="keyword">const</span> __mutex&);
<a name="l00149"></a>00149 __mutex& operator=(<span class="keyword">const</span> __mutex&);
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="keyword">public</span>:
<a name="l00152"></a>00152 __mutex()
<a name="l00153"></a>00153 {
<a name="l00154"></a>00154 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00155"></a>00155 <span class="preprocessor"></span> <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00156"></a>00156 {
<a name="l00157"></a>00157 <span class="preprocessor">#if defined __GTHREAD_MUTEX_INIT</span>
<a name="l00158"></a>00158 <span class="preprocessor"></span> __gthread_mutex_t __tmp = __GTHREAD_MUTEX_INIT;
<a name="l00159"></a>00159 _M_mutex = __tmp;
<a name="l00160"></a>00160 <span class="preprocessor">#else</span>
<a name="l00161"></a>00161 <span class="preprocessor"></span> __GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);
<a name="l00162"></a>00162 <span class="preprocessor">#endif</span>
<a name="l00163"></a>00163 <span class="preprocessor"></span> }
<a name="l00164"></a>00164 <span class="preprocessor">#endif </span>
<a name="l00165"></a>00165 <span class="preprocessor"></span> }
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="preprocessor">#if __GTHREADS && ! defined __GTHREAD_MUTEX_INIT</span>
<a name="l00168"></a>00168 <span class="preprocessor"></span> ~__mutex()
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170 <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00171"></a>00171 __gthread_mutex_destroy(&_M_mutex);
<a name="l00172"></a>00172 }
<a name="l00173"></a>00173 <span class="preprocessor">#endif </span>
<a name="l00174"></a>00174 <span class="preprocessor"></span>
<a name="l00175"></a>00175 <span class="keywordtype">void</span> <a class="code" href="a01172.html#ga81b0bd53957243fe2f3148369df00a95" title="Generic lock.">lock</a>()
<a name="l00176"></a>00176 {
<a name="l00177"></a>00177 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00178"></a>00178 <span class="preprocessor"></span> <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00179"></a>00179 {
<a name="l00180"></a>00180 <span class="keywordflow">if</span> (__gthread_mutex_lock(&_M_mutex) != 0)
<a name="l00181"></a>00181 __throw_concurrence_lock_error();
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183 <span class="preprocessor">#endif</span>
<a name="l00184"></a>00184 <span class="preprocessor"></span> }
<a name="l00185"></a>00185
<a name="l00186"></a>00186 <span class="keywordtype">void</span> unlock()
<a name="l00187"></a>00187 {
<a name="l00188"></a>00188 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00189"></a>00189 <span class="preprocessor"></span> <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00190"></a>00190 {
<a name="l00191"></a>00191 <span class="keywordflow">if</span> (__gthread_mutex_unlock(&_M_mutex) != 0)
<a name="l00192"></a>00192 __throw_concurrence_unlock_error();
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194 <span class="preprocessor">#endif</span>
<a name="l00195"></a>00195 <span class="preprocessor"></span> }
<a name="l00196"></a>00196
<a name="l00197"></a>00197 __gthread_mutex_t* gthread_mutex(<span class="keywordtype">void</span>)
<a name="l00198"></a>00198 { <span class="keywordflow">return</span> &_M_mutex; }
<a name="l00199"></a>00199 };
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="keyword">class </span>__recursive_mutex
<a name="l00202"></a>00202 {
<a name="l00203"></a>00203 <span class="keyword">private</span>:
<a name="l00204"></a>00204 __gthread_recursive_mutex_t _M_mutex;
<a name="l00205"></a>00205
<a name="l00206"></a>00206 __recursive_mutex(<span class="keyword">const</span> __recursive_mutex&);
<a name="l00207"></a>00207 __recursive_mutex& operator=(<span class="keyword">const</span> __recursive_mutex&);
<a name="l00208"></a>00208
<a name="l00209"></a>00209 <span class="keyword">public</span>:
<a name="l00210"></a>00210 __recursive_mutex()
<a name="l00211"></a>00211 {
<a name="l00212"></a>00212 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00213"></a>00213 <span class="preprocessor"></span> <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 <span class="preprocessor">#if defined __GTHREAD_RECURSIVE_MUTEX_INIT</span>
<a name="l00216"></a>00216 <span class="preprocessor"></span> __gthread_recursive_mutex_t __tmp = __GTHREAD_RECURSIVE_MUTEX_INIT;
<a name="l00217"></a>00217 _M_mutex = __tmp;
<a name="l00218"></a>00218 <span class="preprocessor">#else</span>
<a name="l00219"></a>00219 <span class="preprocessor"></span> __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION(&_M_mutex);
<a name="l00220"></a>00220 <span class="preprocessor">#endif</span>
<a name="l00221"></a>00221 <span class="preprocessor"></span> }
<a name="l00222"></a>00222 <span class="preprocessor">#endif </span>
<a name="l00223"></a>00223 <span class="preprocessor"></span> }
<a name="l00224"></a>00224
<a name="l00225"></a>00225 <span class="preprocessor">#if __GTHREADS && ! defined __GTHREAD_RECURSIVE_MUTEX_INIT</span>
<a name="l00226"></a>00226 <span class="preprocessor"></span> ~__recursive_mutex()
<a name="l00227"></a>00227 {
<a name="l00228"></a>00228 <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00229"></a>00229 _S_destroy(&_M_mutex);
<a name="l00230"></a>00230 }
<a name="l00231"></a>00231 <span class="preprocessor">#endif</span>
<a name="l00232"></a>00232 <span class="preprocessor"></span>
<a name="l00233"></a>00233 <span class="keywordtype">void</span> <a class="code" href="a01172.html#ga81b0bd53957243fe2f3148369df00a95" title="Generic lock.">lock</a>()
<a name="l00234"></a>00234 {
<a name="l00235"></a>00235 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00236"></a>00236 <span class="preprocessor"></span> <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00237"></a>00237 {
<a name="l00238"></a>00238 <span class="keywordflow">if</span> (__gthread_recursive_mutex_lock(&_M_mutex) != 0)
<a name="l00239"></a>00239 __throw_concurrence_lock_error();
<a name="l00240"></a>00240 }
<a name="l00241"></a>00241 <span class="preprocessor">#endif</span>
<a name="l00242"></a>00242 <span class="preprocessor"></span> }
<a name="l00243"></a>00243
<a name="l00244"></a>00244 <span class="keywordtype">void</span> unlock()
<a name="l00245"></a>00245 {
<a name="l00246"></a>00246 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00247"></a>00247 <span class="preprocessor"></span> <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00248"></a>00248 {
<a name="l00249"></a>00249 <span class="keywordflow">if</span> (__gthread_recursive_mutex_unlock(&_M_mutex) != 0)
<a name="l00250"></a>00250 __throw_concurrence_unlock_error();
<a name="l00251"></a>00251 }
<a name="l00252"></a>00252 <span class="preprocessor">#endif</span>
<a name="l00253"></a>00253 <span class="preprocessor"></span> }
<a name="l00254"></a>00254
<a name="l00255"></a>00255 __gthread_recursive_mutex_t* gthread_recursive_mutex(<span class="keywordtype">void</span>)
<a name="l00256"></a>00256 { <span class="keywordflow">return</span> &_M_mutex; }
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="preprocessor">#if __GTHREADS && ! defined __GTHREAD_RECURSIVE_MUTEX_INIT</span>
<a name="l00259"></a>00259 <span class="preprocessor"></span> <span class="comment">// FIXME: gthreads doesn't define __gthread_recursive_mutex_destroy</span>
<a name="l00260"></a>00260 <span class="comment">// so we need to obtain a __gthread_mutex_t to destroy</span>
<a name="l00261"></a>00261 <span class="keyword">private</span>:
<a name="l00262"></a>00262 <span class="keyword">template</span><<span class="keyword">typename</span> _Mx, <span class="keyword">typename</span> _Rm>
<a name="l00263"></a>00263 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00264"></a>00264 _S_destroy_win32(_Mx* __mx, _Rm <span class="keyword">const</span>* __rmx)
<a name="l00265"></a>00265 {
<a name="l00266"></a>00266 __mx->counter = __rmx->counter;
<a name="l00267"></a>00267 __mx->sema = __rmx->sema;
<a name="l00268"></a>00268 __gthread_mutex_destroy(__mx);
<a name="l00269"></a>00269 }
<a name="l00270"></a>00270
<a name="l00271"></a>00271 <span class="comment">// matches a gthr-win32.h recursive mutex</span>
<a name="l00272"></a>00272 <span class="keyword">template</span><<span class="keyword">typename</span> _Rm>
<a name="l00273"></a>00273 <span class="keyword">static</span> <span class="keyword">typename</span> __enable_if<sizeof(&_Rm::sema), void>::__type
<a name="l00274"></a>00274 _S_destroy(_Rm* __mx)
<a name="l00275"></a>00275 {
<a name="l00276"></a>00276 __gthread_mutex_t __tmp;
<a name="l00277"></a>00277 _S_destroy_win32(&__tmp, __mx);
<a name="l00278"></a>00278 }
<a name="l00279"></a>00279
<a name="l00280"></a>00280 <span class="comment">// matches a recursive mutex with a member 'actual'</span>
<a name="l00281"></a>00281 <span class="keyword">template</span><<span class="keyword">typename</span> _Rm>
<a name="l00282"></a>00282 <span class="keyword">static</span> <span class="keyword">typename</span> __enable_if<sizeof(&_Rm::actual), void>::__type
<a name="l00283"></a>00283 _S_destroy(_Rm* __mx)
<a name="l00284"></a>00284 { __gthread_mutex_destroy(&__mx->actual); }
<a name="l00285"></a>00285
<a name="l00286"></a>00286 <span class="comment">// matches when there's only one mutex type</span>
<a name="l00287"></a>00287 <span class="keyword">template</span><<span class="keyword">typename</span> _Rm>
<a name="l00288"></a>00288 <span class="keyword">static</span> <span class="keyword">typename</span>
<a name="l00289"></a>00289 __enable_if<std::__are_same<_Rm, __gthread_mutex_t>::__value,
<a name="l00290"></a>00290 <span class="keywordtype">void</span>>::__type
<a name="l00291"></a>00291 _S_destroy(_Rm* __mx)
<a name="l00292"></a>00292 { __gthread_mutex_destroy(__mx); }
<a name="l00293"></a>00293 <span class="preprocessor">#endif</span>
<a name="l00294"></a>00294 <span class="preprocessor"></span> };
<a name="l00295"></a>00295 <span class="comment"></span>
<a name="l00296"></a>00296 <span class="comment"> /// Scoped lock idiom.</span>
<a name="l00297"></a>00297 <span class="comment"></span> <span class="comment">// Acquire the mutex here with a constructor call, then release with</span>
<a name="l00298"></a>00298 <span class="comment">// the destructor call in accordance with RAII style.</span>
<a name="l00299"></a><a class="code" href="a00018.html">00299</a> <span class="keyword">class </span><a class="code" href="a00018.html" title="Scoped lock idiom.">__scoped_lock</a>
<a name="l00300"></a>00300 {
<a name="l00301"></a>00301 <span class="keyword">public</span>:
<a name="l00302"></a>00302 <span class="keyword">typedef</span> __mutex __mutex_type;
<a name="l00303"></a>00303
<a name="l00304"></a>00304 <span class="keyword">private</span>:
<a name="l00305"></a>00305 __mutex_type& _M_device;
<a name="l00306"></a>00306
<a name="l00307"></a>00307 <a class="code" href="a00018.html" title="Scoped lock idiom.">__scoped_lock</a>(<span class="keyword">const</span> <a class="code" href="a00018.html" title="Scoped lock idiom.">__scoped_lock</a>&);
<a name="l00308"></a>00308 <a class="code" href="a00018.html" title="Scoped lock idiom.">__scoped_lock</a>& operator=(<span class="keyword">const</span> <a class="code" href="a00018.html" title="Scoped lock idiom.">__scoped_lock</a>&);
<a name="l00309"></a>00309
<a name="l00310"></a>00310 <span class="keyword">public</span>:
<a name="l00311"></a>00311 <span class="keyword">explicit</span> <a class="code" href="a00018.html" title="Scoped lock idiom.">__scoped_lock</a>(__mutex_type& __name) : _M_device(__name)
<a name="l00312"></a>00312 { _M_device.lock(); }
<a name="l00313"></a>00313
<a name="l00314"></a>00314 ~<a class="code" href="a00018.html" title="Scoped lock idiom.">__scoped_lock</a>() <span class="keywordflow">throw</span>()
<a name="l00315"></a>00315 { _M_device.unlock(); }
<a name="l00316"></a>00316 };
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="preprocessor">#ifdef __GTHREAD_HAS_COND</span>
<a name="l00319"></a>00319 <span class="preprocessor"></span> <span class="keyword">class </span>__cond
<a name="l00320"></a>00320 {
<a name="l00321"></a>00321 <span class="keyword">private</span>:
<a name="l00322"></a>00322 __gthread_cond_t _M_cond;
<a name="l00323"></a>00323
<a name="l00324"></a>00324 __cond(<span class="keyword">const</span> __cond&);
<a name="l00325"></a>00325 __cond& operator=(<span class="keyword">const</span> __cond&);
<a name="l00326"></a>00326
<a name="l00327"></a>00327 <span class="keyword">public</span>:
<a name="l00328"></a>00328 __cond()
<a name="l00329"></a>00329 {
<a name="l00330"></a>00330 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00331"></a>00331 <span class="preprocessor"></span> <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00332"></a>00332 {
<a name="l00333"></a>00333 <span class="preprocessor">#if defined __GTHREAD_COND_INIT</span>
<a name="l00334"></a>00334 <span class="preprocessor"></span> __gthread_cond_t __tmp = __GTHREAD_COND_INIT;
<a name="l00335"></a>00335 _M_cond = __tmp;
<a name="l00336"></a>00336 <span class="preprocessor">#else</span>
<a name="l00337"></a>00337 <span class="preprocessor"></span> __GTHREAD_COND_INIT_FUNCTION(&_M_cond);
<a name="l00338"></a>00338 <span class="preprocessor">#endif</span>
<a name="l00339"></a>00339 <span class="preprocessor"></span> }
<a name="l00340"></a>00340 <span class="preprocessor">#endif </span>
<a name="l00341"></a>00341 <span class="preprocessor"></span> }
<a name="l00342"></a>00342
<a name="l00343"></a>00343 <span class="preprocessor">#if __GTHREADS && ! defined __GTHREAD_COND_INIT</span>
<a name="l00344"></a>00344 <span class="preprocessor"></span> ~__cond()
<a name="l00345"></a>00345 {
<a name="l00346"></a>00346 <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00347"></a>00347 __gthread_cond_destroy(&_M_cond);
<a name="l00348"></a>00348 }
<a name="l00349"></a>00349 <span class="preprocessor">#endif </span>
<a name="l00350"></a>00350 <span class="preprocessor"></span>
<a name="l00351"></a>00351 <span class="keywordtype">void</span> broadcast()
<a name="l00352"></a>00352 {
<a name="l00353"></a>00353 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00354"></a>00354 <span class="preprocessor"></span> <span class="keywordflow">if</span> (__gthread_active_p())
<a name="l00355"></a>00355 {
<a name="l00356"></a>00356 <span class="keywordflow">if</span> (__gthread_cond_broadcast(&_M_cond) != 0)
<a name="l00357"></a>00357 __throw_concurrence_broadcast_error();
<a name="l00358"></a>00358 }
<a name="l00359"></a>00359 <span class="preprocessor">#endif</span>
<a name="l00360"></a>00360 <span class="preprocessor"></span> }
<a name="l00361"></a>00361
<a name="l00362"></a>00362 <span class="keywordtype">void</span> wait(__mutex *mutex)
<a name="l00363"></a>00363 {
<a name="l00364"></a>00364 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00365"></a>00365 <span class="preprocessor"></span> {
<a name="l00366"></a>00366 <span class="keywordflow">if</span> (__gthread_cond_wait(&_M_cond, mutex->gthread_mutex()) != 0)
<a name="l00367"></a>00367 __throw_concurrence_wait_error();
<a name="l00368"></a>00368 }
<a name="l00369"></a>00369 <span class="preprocessor">#endif</span>
<a name="l00370"></a>00370 <span class="preprocessor"></span> }
<a name="l00371"></a>00371
<a name="l00372"></a>00372 <span class="keywordtype">void</span> wait_recursive(__recursive_mutex *mutex)
<a name="l00373"></a>00373 {
<a name="l00374"></a>00374 <span class="preprocessor">#if __GTHREADS</span>
<a name="l00375"></a>00375 <span class="preprocessor"></span> {
<a name="l00376"></a>00376 <span class="keywordflow">if</span> (__gthread_cond_wait_recursive(&_M_cond,
<a name="l00377"></a>00377 mutex->gthread_recursive_mutex())
<a name="l00378"></a>00378 != 0)
<a name="l00379"></a>00379 __throw_concurrence_wait_error();
<a name="l00380"></a>00380 }
<a name="l00381"></a>00381 <span class="preprocessor">#endif</span>
<a name="l00382"></a>00382 <span class="preprocessor"></span> }
<a name="l00383"></a>00383 };
<a name="l00384"></a>00384 <span class="preprocessor">#endif</span>
<a name="l00385"></a>00385 <span class="preprocessor"></span>
<a name="l00386"></a>00386 _GLIBCXX_END_NAMESPACE_VERSION
<a name="l00387"></a>00387 } <span class="comment">// namespace</span>
<a name="l00388"></a>00388
<a name="l00389"></a>00389 <span class="preprocessor">#endif</span>
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