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<h1>include/native/sem.h</h1><a href="include_2native_2sem_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 
<a name="l00022"></a>00022 <span class="preprocessor">#ifndef _XENO_SEM_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#define _XENO_SEM_H</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;nucleus/synch.h&gt;</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;<a class="code" href="native_2types_8h.html" title="This file is part of the Xenomai project.">native/types.h</a>&gt;</span>
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 <span class="comment">/* Creation flags. */</span>
<a name="l00029"></a>00029 <span class="preprocessor">#define S_PRIO  XNSYNCH_PRIO    </span><span class="comment">/* Pend by task priority order. */</span>
<a name="l00030"></a>00030 <span class="preprocessor">#define S_FIFO  XNSYNCH_FIFO    </span><span class="comment">/* Pend by FIFO order. */</span>
<a name="l00031"></a>00031 <span class="preprocessor">#define S_PULSE 0x100           </span><span class="comment">/* Apply pulse mode. */</span>
<a name="l00032"></a>00032 
<a name="l00033"></a>00033 <span class="keyword">typedef</span> <span class="keyword">struct </span>rt_sem_info {
<a name="l00034"></a>00034 
<a name="l00035"></a>00035     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> count; <span class="comment">/* !&lt; Current semaphore value. */</span>
<a name="l00036"></a>00036 
<a name="l00037"></a>00037     <span class="keywordtype">int</span> nwaiters;       <span class="comment">/* !&lt; Number of pending tasks. */</span>
<a name="l00038"></a>00038 
<a name="l00039"></a>00039     <span class="keywordtype">char</span> name[XNOBJECT_NAME_LEN]; <span class="comment">/* !&lt; Symbolic name. */</span>
<a name="l00040"></a>00040 
<a name="l00041"></a>00041 } RT_SEM_INFO;
<a name="l00042"></a>00042 
<a name="l00043"></a>00043 <span class="keyword">typedef</span> <span class="keyword">struct </span>rt_sem_placeholder {
<a name="l00044"></a>00044     xnhandle_t opaque;
<a name="l00045"></a>00045 } RT_SEM_PLACEHOLDER;
<a name="l00046"></a>00046 
<a name="l00047"></a>00047 <span class="preprocessor">#if (defined(__KERNEL__) || defined(__XENO_SIM__)) &amp;&amp; !defined(DOXYGEN_CPP)</span>
<a name="l00048"></a>00048 <span class="preprocessor"></span>
<a name="l00049"></a>00049 <span class="preprocessor">#include &lt;<a class="code" href="native_2ppd_8h.html" title="This file is part of the Xenomai project.">native/ppd.h</a>&gt;</span>
<a name="l00050"></a>00050 
<a name="l00051"></a>00051 <span class="preprocessor">#define XENO_SEM_MAGIC 0x55550303</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span>
<a name="l00053"></a>00053 <span class="keyword">typedef</span> <span class="keyword">struct </span>rt_sem {
<a name="l00054"></a>00054 
<a name="l00055"></a>00055     <span class="keywordtype">unsigned</span> magic;   <span class="comment">/* !&lt; Magic code - must be first */</span>
<a name="l00056"></a>00056 
<a name="l00057"></a>00057     xnsynch_t synch_base; <span class="comment">/* !&lt; Base synchronization object. */</span>
<a name="l00058"></a>00058 
<a name="l00059"></a>00059     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> count; <span class="comment">/* !&lt; Current semaphore value. */</span>
<a name="l00060"></a>00060 
<a name="l00061"></a>00061     <span class="keywordtype">int</span> mode;           <span class="comment">/* !&lt; Creation mode. */</span>
<a name="l00062"></a>00062 
<a name="l00063"></a>00063     xnhandle_t handle;  <span class="comment">/* !&lt; Handle in registry -- zero if unregistered. */</span>
<a name="l00064"></a>00064 
<a name="l00065"></a>00065     <span class="keywordtype">char</span> name[XNOBJECT_NAME_LEN]; <span class="comment">/* !&lt; Symbolic name. */</span>
<a name="l00066"></a>00066 
<a name="l00067"></a>00067 <span class="preprocessor">#ifdef CONFIG_XENO_OPT_PERVASIVE</span>
<a name="l00068"></a>00068 <span class="preprocessor"></span>    pid_t cpid;                 <span class="comment">/* !&lt; Creator's pid. */</span>
<a name="l00069"></a>00069 <span class="preprocessor">#endif </span><span class="comment">/* CONFIG_XENO_OPT_PERVASIVE */</span>
<a name="l00070"></a>00070 
<a name="l00071"></a>00071     xnholder_t rlink;           <span class="comment">/* !&lt; Link in resource queue. */</span>
<a name="l00072"></a>00072 
<a name="l00073"></a>00073 <span class="preprocessor">#define rlink2sem(ln)           container_of(ln, RT_SEM, rlink)</span>
<a name="l00074"></a>00074 <span class="preprocessor"></span>
<a name="l00075"></a>00075     xnqueue_t *rqueue;          <span class="comment">/* !&lt; Backpointer to resource queue. */</span>
<a name="l00076"></a>00076 
<a name="l00077"></a>00077 } RT_SEM;
<a name="l00078"></a>00078 
<a name="l00079"></a>00079 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00080"></a>00080 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> {
<a name="l00081"></a>00081 <span class="preprocessor">#endif</span>
<a name="l00082"></a>00082 <span class="preprocessor"></span>
<a name="l00083"></a>00083 <span class="preprocessor">#ifdef CONFIG_XENO_OPT_NATIVE_SEM</span>
<a name="l00084"></a>00084 <span class="preprocessor"></span>
<a name="l00085"></a>00085 <span class="keywordtype">int</span> __native_sem_pkg_init(<span class="keywordtype">void</span>);
<a name="l00086"></a>00086 
<a name="l00087"></a>00087 <span class="keywordtype">void</span> __native_sem_pkg_cleanup(<span class="keywordtype">void</span>);
<a name="l00088"></a>00088 
<a name="l00089"></a>00089 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> __native_sem_flush_rq(xnqueue_t *rq)
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091         xeno_flush_rq(RT_SEM, rq, sem);
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093 
<a name="l00094"></a>00094 <span class="keywordtype">int</span> rt_sem_p_inner(RT_SEM *sem,
<a name="l00095"></a>00095                    xntmode_t timeout_mode, RTIME timeout);
<a name="l00096"></a>00096 
<a name="l00097"></a>00097 <span class="preprocessor">#else </span><span class="comment">/* !CONFIG_XENO_OPT_NATIVE_SEM */</span>
<a name="l00098"></a>00098 
<a name="l00099"></a>00099 <span class="preprocessor">#define __native_sem_pkg_init()         ({ 0; })</span>
<a name="l00100"></a>00100 <span class="preprocessor"></span><span class="preprocessor">#define __native_sem_pkg_cleanup()              do { } while(0)</span>
<a name="l00101"></a>00101 <span class="preprocessor"></span><span class="preprocessor">#define __native_sem_flush_rq(rq)               do { } while(0)</span>
<a name="l00102"></a>00102 <span class="preprocessor"></span>
<a name="l00103"></a>00103 <span class="preprocessor">#endif </span><span class="comment">/* !CONFIG_XENO_OPT_NATIVE_SEM */</span>
<a name="l00104"></a>00104 
<a name="l00105"></a>00105 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00106"></a>00106 <span class="preprocessor"></span>}
<a name="l00107"></a>00107 <span class="preprocessor">#endif</span>
<a name="l00108"></a>00108 <span class="preprocessor"></span>
<a name="l00109"></a>00109 <span class="preprocessor">#else </span><span class="comment">/* !(__KERNEL__ || __XENO_SIM__) */</span>
<a name="l00110"></a>00110 
<a name="l00111"></a>00111 <span class="keyword">typedef</span> RT_SEM_PLACEHOLDER RT_SEM;
<a name="l00112"></a>00112 
<a name="l00113"></a>00113 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00114"></a>00114 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> {
<a name="l00115"></a>00115 <span class="preprocessor">#endif</span>
<a name="l00116"></a>00116 <span class="preprocessor"></span>
<a name="l00117"></a>00117 <span class="keywordtype">int</span> <a class="code" href="group__semaphore.html#g1520b55854f94b99852d24d1cbd0b29d" title="Bind to a semaphore.">rt_sem_bind</a>(RT_SEM *sem,
<a name="l00118"></a>00118                 <span class="keyword">const</span> <span class="keywordtype">char</span> *name,
<a name="l00119"></a>00119                 RTIME timeout);
<a name="l00120"></a>00120 
<a name="l00121"></a><a class="code" href="group__semaphore.html#g851cc0b485d43b52f580f75c72afe2a3">00121</a> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="group__semaphore.html#g851cc0b485d43b52f580f75c72afe2a3" title="Unbind from a semaphore.">rt_sem_unbind</a> (RT_SEM *sem)
<a name="l00122"></a>00122 
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124     sem-&gt;opaque = XN_NO_HANDLE;
<a name="l00125"></a>00125     <span class="keywordflow">return</span> 0;
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127 
<a name="l00128"></a>00128 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00129"></a>00129 <span class="preprocessor"></span>}
<a name="l00130"></a>00130 <span class="preprocessor">#endif</span>
<a name="l00131"></a>00131 <span class="preprocessor"></span>
<a name="l00132"></a>00132 <span class="preprocessor">#endif </span><span class="comment">/* __KERNEL__ || __XENO_SIM__ */</span>
<a name="l00133"></a>00133 
<a name="l00134"></a>00134 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00135"></a>00135 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> {
<a name="l00136"></a>00136 <span class="preprocessor">#endif</span>
<a name="l00137"></a>00137 <span class="preprocessor"></span>
<a name="l00138"></a>00138 <span class="comment">/* Public interface. */</span>
<a name="l00139"></a>00139 
<a name="l00140"></a>00140 <span class="keywordtype">int</span> <a class="code" href="group__semaphore.html#gba36e3ac8972ea74feb60640e58d1ceb" title="Create a counting semaphore.">rt_sem_create</a>(RT_SEM *sem,
<a name="l00141"></a>00141                   <span class="keyword">const</span> <span class="keywordtype">char</span> *name,
<a name="l00142"></a>00142                   <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> icount,
<a name="l00143"></a>00143                   <span class="keywordtype">int</span> mode);
<a name="l00144"></a>00144 
<a name="l00145"></a>00145 <span class="keywordtype">int</span> <a class="code" href="group__semaphore.html#ga14cefc4dae46a7c95859e7fe46df888" title="Delete a semaphore.">rt_sem_delete</a>(RT_SEM *sem);
<a name="l00146"></a>00146 
<a name="l00147"></a>00147 <span class="keywordtype">int</span> <a class="code" href="group__semaphore.html#gdd299dfe4a53194870bf4e158ca89d1f" title="Pend on a semaphore.">rt_sem_p</a>(RT_SEM *sem,
<a name="l00148"></a>00148              RTIME timeout);
<a name="l00149"></a>00149 
<a name="l00150"></a>00150 <span class="keywordtype">int</span> <a class="code" href="group__semaphore.html#gc481c1f1a2184a998deb2110f2c5b04d" title="Pend on a semaphore (with absolute timeout date).">rt_sem_p_until</a>(RT_SEM *sem,
<a name="l00151"></a>00151                    RTIME timeout);
<a name="l00152"></a>00152 
<a name="l00153"></a>00153 <span class="keywordtype">int</span> <a class="code" href="group__semaphore.html#ga5a7927862a511a27741223e08e48270" title="Signal a semaphore.">rt_sem_v</a>(RT_SEM *sem);
<a name="l00154"></a>00154 
<a name="l00155"></a>00155 <span class="keywordtype">int</span> <a class="code" href="group__semaphore.html#g4a8963240e68d164a2e5bb148da44fbc" title="Broadcast a semaphore.">rt_sem_broadcast</a>(RT_SEM *sem);
<a name="l00156"></a>00156 
<a name="l00157"></a>00157 <span class="keywordtype">int</span> <a class="code" href="group__semaphore.html#g48235bfa78df58a71d7a38582898cb07" title="Inquire about a semaphore.">rt_sem_inquire</a>(RT_SEM *sem,
<a name="l00158"></a>00158                    RT_SEM_INFO *info);
<a name="l00159"></a>00159 
<a name="l00160"></a>00160 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00161"></a>00161 <span class="preprocessor"></span>}
<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><span class="comment">/* !_XENO_SEM_H */</span>
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