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<div id="projectname">C Standard Library Extensions
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* $Id$</span>
<a name="l00002"></a>00002 <span class="comment"> *</span>
<a name="l00003"></a>00003 <span class="comment"> * This file is part of the ESO C Extension Library</span>
<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2001-2011 European Southern Observatory</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * This program is free software; you can redistribute it and/or modify</span>
<a name="l00007"></a>00007 <span class="comment"> * it under the terms of the GNU General Public License as published by</span>
<a name="l00008"></a>00008 <span class="comment"> * the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00009"></a>00009 <span class="comment"> * (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * This program is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment"> * but 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</span>
<a name="l00014"></a>00014 <span class="comment"> * GNU General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * You should have received a copy of the GNU General Public License</span>
<a name="l00017"></a>00017 <span class="comment"> * along with this program; if not, write to the Free Software</span>
<a name="l00018"></a>00018 <span class="comment"> * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="comment">/*</span>
<a name="l00022"></a>00022 <span class="comment"> * $Author$</span>
<a name="l00023"></a>00023 <span class="comment"> * $Date$</span>
<a name="l00024"></a>00024 <span class="comment"> * $Revision$</span>
<a name="l00025"></a>00025 <span class="comment"> * $Name$</span>
<a name="l00026"></a>00026 <span class="comment"> */</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="preprocessor">#ifndef CXTHREAD_H_</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define CXTHREAD_H_</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="preprocessor">#if HAVE_CONFIG_H</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span><span class="preprocessor"># include "config.h"</span>
<a name="l00033"></a>00033 <span class="preprocessor">#endif</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span>
<a name="l00035"></a>00035 <span class="preprocessor">#ifdef HAVE_PTHREAD_H</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor"># include <pthread.h></span>
<a name="l00037"></a>00037 <span class="preprocessor">#endif</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span>
<a name="l00039"></a>00039 <span class="preprocessor">#include <cxtypes.h></span>
<a name="l00040"></a>00040
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="comment">/*</span>
<a name="l00043"></a>00043 <span class="comment"> * Map local types and functions to the POSIX thread model implementation</span>
<a name="l00044"></a>00044 <span class="comment"> */</span>
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="preprocessor">#if defined(CX_THREADS_ENABLED)</span>
<a name="l00047"></a>00047 <span class="preprocessor"></span>
<a name="l00048"></a>00048 <span class="preprocessor">#if defined(HAVE_PTHREAD_H)</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span>
<a name="l00050"></a>00050 <span class="preprocessor">#define CX_STATIC_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER</span>
<a name="l00051"></a>00051 <span class="preprocessor"></span><span class="preprocessor">#define CX_STATIC_ONCE_INIT PTHREAD_ONCE_INIT</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span>
<a name="l00053"></a>00053 <span class="keyword">typedef</span> pthread_mutex_t cx_mutex;
<a name="l00054"></a>00054 <span class="keyword">typedef</span> pthread_once_t cx_once;
<a name="l00055"></a>00055 <span class="keyword">typedef</span> pthread_key_t cx_private;
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="preprocessor">#define cx_mutex_lock(mutex) pthread_mutex_lock((mutex))</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span><span class="preprocessor">#define cx_mutex_trylock(mutex) pthread_mutex_trylock((mutex))</span>
<a name="l00059"></a>00059 <span class="preprocessor"></span><span class="preprocessor">#define cx_mutex_unlock(mutex) pthread_mutex_unlock((mutex))</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span>
<a name="l00061"></a>00061 <span class="preprocessor">#define cx_thread_once(name, func, args) pthread_once(&(name), (func))</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span>
<a name="l00063"></a>00063 <span class="preprocessor">#define cx_private_init(name, func) pthread_key_create(&(name), (func))</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span><span class="preprocessor">#define cx_private_set(name, data) pthread_setspecific((name), (data))</span>
<a name="l00065"></a>00065 <span class="preprocessor"></span><span class="preprocessor">#define cx_private_get(name) pthread_getspecific((name))</span>
<a name="l00066"></a>00066 <span class="preprocessor"></span>
<a name="l00067"></a>00067 <span class="preprocessor">#else </span><span class="comment">/* !HAVE_PTHREAD_H */</span>
<a name="l00068"></a>00068 <span class="preprocessor"># error "Thread support is requested, but POSIX thread model is not present!"</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* !HAVE_PTHREAD_H */</span>
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="preprocessor">#else </span><span class="comment">/* !CX_THREADS_ENABLED */</span>
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="keyword">typedef</span> <span class="keyword">struct </span>cx_private cx_private;
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="preprocessor">#define cx_mutex_lock(mutex) </span><span class="comment">/* empty */</span>
<a name="l00076"></a>00076 <span class="preprocessor">#define cx_mutex_trylock(mutex) </span><span class="comment">/* empty */</span>
<a name="l00077"></a>00077 <span class="preprocessor">#define cx_mutex_unlock(mutex) </span><span class="comment">/* empty */</span>
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <span class="preprocessor">#define cx_thread_once(name, func, args) (func)()</span>
<a name="l00080"></a>00080 <span class="preprocessor"></span>
<a name="l00081"></a>00081 <span class="preprocessor">#define cx_private_init(name, func) </span><span class="comment">/* empty */</span>
<a name="l00082"></a>00082 <span class="preprocessor">#define cx_private_set(name, data) ((name) = (data))</span>
<a name="l00083"></a>00083 <span class="preprocessor"></span><span class="preprocessor">#define cx_private_get(name) (name)</span>
<a name="l00084"></a>00084 <span class="preprocessor"></span>
<a name="l00085"></a>00085 <span class="preprocessor">#endif </span><span class="comment">/* !CX_THREADS_ENABLED */</span>
<a name="l00086"></a>00086
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="comment">/*</span>
<a name="l00089"></a>00089 <span class="comment"> * Convenience macros to setup locks for global variables.</span>
<a name="l00090"></a>00090 <span class="comment"> * These macros expand to nothing, if thread support was not enabled.</span>
<a name="l00091"></a>00091 <span class="comment"> */</span>
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="preprocessor">#define CX_LOCK_NAME(name) _cx__ ## name ## _lock</span>
<a name="l00094"></a>00094 <span class="preprocessor"></span>
<a name="l00095"></a>00095 <span class="preprocessor">#if defined(CX_THREADS_ENABLED)</span>
<a name="l00096"></a>00096 <span class="preprocessor"></span>
<a name="l00097"></a>00097 <span class="preprocessor"># define CX_LOCK_DEFINE_STATIC(name) static CX_LOCK_DEFINE(name)</span>
<a name="l00098"></a>00098 <span class="preprocessor"></span><span class="preprocessor"># define CX_LOCK_DEFINE(name) cx_mutex CX_LOCK_NAME(name) = CX_STATIC_MUTEX_INIT</span>
<a name="l00099"></a>00099 <span class="preprocessor"></span><span class="preprocessor"># define CX_LOCK_EXTERN(name) extern cx_mutex CX_LOCK_NAME(name)</span>
<a name="l00100"></a>00100 <span class="preprocessor"></span>
<a name="l00101"></a>00101 <span class="preprocessor"># define CX_LOCK(name) cx_mutex_lock(&CX_LOCK_NAME(name))</span>
<a name="l00102"></a>00102 <span class="preprocessor"></span><span class="preprocessor"># define CX_TRYLOCK(name) cx_mutex_trylock(&CX_LOCK_NAME(name))</span>
<a name="l00103"></a>00103 <span class="preprocessor"></span><span class="preprocessor"># define CX_UNLOCK(name) cx_mutex_unlock(&CX_LOCK_NAME(name))</span>
<a name="l00104"></a>00104 <span class="preprocessor"></span>
<a name="l00105"></a>00105 <span class="preprocessor">#else </span><span class="comment">/* !CX_THREADS_ENABLED */</span>
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="preprocessor"># define CX_LOCK_DEFINE_STATIC(name) </span><span class="comment">/* empty */</span>
<a name="l00108"></a>00108 <span class="preprocessor"># define CX_LOCK_DEFINE(name) </span><span class="comment">/* empty */</span>
<a name="l00109"></a>00109 <span class="preprocessor"># define CX_LOCK_EXTERN(name) </span><span class="comment">/* empty */</span>
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="preprocessor"># define CX_LOCK(name) </span><span class="comment">/* empty */</span>
<a name="l00112"></a>00112 <span class="preprocessor"># define CX_TRYLOCK(name) (TRUE)</span>
<a name="l00113"></a>00113 <span class="preprocessor"></span><span class="preprocessor"># define CX_UNLOCK(name) </span><span class="comment">/* empty */</span>
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="preprocessor">#endif </span><span class="comment">/* !CX_THREADS_ENABLED */</span>
<a name="l00116"></a>00116
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="comment">/*</span>
<a name="l00119"></a>00119 <span class="comment"> * Convenience macros for setting up mutexes for one time initalizations</span>
<a name="l00120"></a>00120 <span class="comment"> */</span>
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="preprocessor">#if defined(CX_THREADS_ENABLED)</span>
<a name="l00123"></a>00123 <span class="preprocessor"></span>
<a name="l00124"></a>00124 <span class="preprocessor"># define CX_ONCE_DEFINE_STATIC(name) static CX_ONCE_DEFINE(name)</span>
<a name="l00125"></a>00125 <span class="preprocessor"></span><span class="preprocessor"># define CX_ONCE_DEFINE(name) cx_once (name) = CX_STATIC_ONCE_INIT</span>
<a name="l00126"></a>00126 <span class="preprocessor"></span>
<a name="l00127"></a>00127 <span class="preprocessor">#else </span><span class="comment">/* !CX_THREADS_ENABLED */</span>
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="preprocessor"># define CX_ONCE_DEFINE_STATIC(name) </span><span class="comment">/* empty */</span>
<a name="l00130"></a>00130 <span class="preprocessor"># define CX_ONCE_DEFINE(name) </span><span class="comment">/* empty */</span>
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="preprocessor">#endif </span><span class="comment">/* !CX_THREADS_ENABLED */</span>
<a name="l00133"></a>00133
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="comment">/*</span>
<a name="l00136"></a>00136 <span class="comment"> * Convenience macros for setting up thread-specific data</span>
<a name="l00137"></a>00137 <span class="comment"> */</span>
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="preprocessor">#if defined(CX_THREADS_ENABLED)</span>
<a name="l00140"></a>00140 <span class="preprocessor"></span>
<a name="l00141"></a>00141 <span class="preprocessor"># define CX_PRIVATE_DEFINE_STATIC(name) cx_private (name)</span>
<a name="l00142"></a>00142 <span class="preprocessor"></span>
<a name="l00143"></a>00143 <span class="preprocessor">#else </span><span class="comment">/* !CX_THREADS_ENABLED */</span>
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <span class="preprocessor"># define CX_PRIVATE_DEFINE_STATIC(name) static cx_private *(name)</span>
<a name="l00146"></a>00146 <span class="preprocessor"></span>
<a name="l00147"></a>00147 <span class="preprocessor">#endif </span><span class="comment">/* !CX_THREADS_ENABLED */</span>
<a name="l00148"></a>00148
<a name="l00149"></a>00149 <span class="preprocessor">#endif </span><span class="comment">/* CXTHREAD_H_ */</span>
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