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<h1>src/libsphinxbase/util/sbthread.c</h1> </div>
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<div class="contents">
<a href="sbthread_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */</span>
<a name="l00002"></a>00002 <span class="comment">/* ====================================================================</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (c) 2008 Carnegie Mellon University. All rights </span>
<a name="l00004"></a>00004 <span class="comment"> * reserved.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00007"></a>00007 <span class="comment"> * modification, are permitted provided that the following conditions</span>
<a name="l00008"></a>00008 <span class="comment"> * are met:</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span>
<a name="l00011"></a>00011 <span class="comment"> * notice, this list of conditions and the following disclaimer. </span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span>
<a name="l00014"></a>00014 <span class="comment"> * notice, this list of conditions and the following disclaimer in</span>
<a name="l00015"></a>00015 <span class="comment"> * the documentation and/or other materials provided with the</span>
<a name="l00016"></a>00016 <span class="comment"> * distribution.</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * This work was supported in part by funding from the Defense Advanced </span>
<a name="l00019"></a>00019 <span class="comment"> * Research Projects Agency and the National Science Foundation of the </span>
<a name="l00020"></a>00020 <span class="comment"> * United States of America, and the CMU Sphinx Speech Consortium.</span>
<a name="l00021"></a>00021 <span class="comment"> *</span>
<a name="l00022"></a>00022 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND </span>
<a name="l00023"></a>00023 <span class="comment"> * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, </span>
<a name="l00024"></a>00024 <span class="comment"> * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span>
<a name="l00025"></a>00025 <span class="comment"> * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY</span>
<a name="l00026"></a>00026 <span class="comment"> * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00027"></a>00027 <span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT </span>
<a name="l00028"></a>00028 <span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, </span>
<a name="l00029"></a>00029 <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY </span>
<a name="l00030"></a>00030 <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT </span>
<a name="l00031"></a>00031 <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE </span>
<a name="l00032"></a>00032 <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00033"></a>00033 <span class="comment"> *</span>
<a name="l00034"></a>00034 <span class="comment"> * ====================================================================</span>
<a name="l00035"></a>00035 <span class="comment"> *</span>
<a name="l00036"></a>00036 <span class="comment"> */</span>
<a name="l00037"></a>00037
<a name="l00044"></a>00044 <span class="preprocessor">#include <string.h></span>
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="preprocessor">#include "sphinxbase/sbthread.h"</span>
<a name="l00047"></a>00047 <span class="preprocessor">#include "sphinxbase/ckd_alloc.h"</span>
<a name="l00048"></a>00048 <span class="preprocessor">#include "sphinxbase/err.h"</span>
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <span class="comment">/*</span>
<a name="l00051"></a>00051 <span class="comment"> * Platform-specific parts: threads, mutexes, and signals.</span>
<a name="l00052"></a>00052 <span class="comment"> */</span>
<a name="l00053"></a>00053 <span class="preprocessor">#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(__SYMBIAN32__)</span>
<a name="l00054"></a>00054 <span class="preprocessor"></span><span class="preprocessor">#define _WIN32_WINNT 0x0400</span>
<a name="l00055"></a>00055 <span class="preprocessor"></span><span class="preprocessor">#include <windows.h></span>
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="keyword">struct </span><a class="code" href="structsbthread__s.html">sbthread_s</a> {
<a name="l00058"></a>00058 <a class="code" href="structcmd__ln__t.html" title="Opaque structure used to hold the results of command-line parsing.">cmd_ln_t</a> *config;
<a name="l00059"></a>00059 <a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *msgq;
<a name="l00060"></a>00060 <a class="code" href="sbthread_8h.html#acb30b2ddcf70058f8bd38d68920be777" title="Entry point for a thread.">sbthread_main</a> func;
<a name="l00061"></a>00061 <span class="keywordtype">void</span> *arg;
<a name="l00062"></a>00062 HANDLE th;
<a name="l00063"></a>00063 DWORD tid;
<a name="l00064"></a>00064 };
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="keyword">struct </span><a class="code" href="structsbmsgq__s.html">sbmsgq_s</a> {
<a name="l00067"></a>00067 <span class="comment">/* Ringbuffer for passing messages. */</span>
<a name="l00068"></a>00068 <span class="keywordtype">char</span> *data;
<a name="l00069"></a>00069 <span class="keywordtype">size_t</span> depth;
<a name="l00070"></a>00070 <span class="keywordtype">size_t</span> out;
<a name="l00071"></a>00071 <span class="keywordtype">size_t</span> nbytes;
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">/* Current message is stored here. */</span>
<a name="l00074"></a>00074 <span class="keywordtype">char</span> *msg;
<a name="l00075"></a>00075 <span class="keywordtype">size_t</span> msglen;
<a name="l00076"></a>00076 CRITICAL_SECTION mtx;
<a name="l00077"></a>00077 HANDLE evt;
<a name="l00078"></a>00078 };
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="keyword">struct </span><a class="code" href="structsbevent__s.html">sbevent_s</a> {
<a name="l00081"></a>00081 HANDLE evt;
<a name="l00082"></a>00082 };
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="keyword">struct </span><a class="code" href="structsbmtx__s.html">sbmtx_s</a> {
<a name="l00085"></a>00085 CRITICAL_SECTION mtx;
<a name="l00086"></a>00086 };
<a name="l00087"></a>00087
<a name="l00088"></a>00088 DWORD WINAPI
<a name="l00089"></a>00089 sbthread_internal_main(LPVOID arg)
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 <a class="code" href="structsbthread__s.html">sbthread_t</a> *th = (<a class="code" href="structsbthread__s.html">sbthread_t</a> *)arg;
<a name="l00092"></a>00092 <span class="keywordtype">int</span> rv;
<a name="l00093"></a>00093
<a name="l00094"></a>00094 rv = (*th->func)(th);
<a name="l00095"></a>00095 <span class="keywordflow">return</span> (DWORD)rv;
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097
<a name="l00098"></a>00098 <a class="code" href="structsbthread__s.html">sbthread_t</a> *
<a name="l00099"></a>00099 <a class="code" href="sbthread_8h.html#abfe1f703f4e17a2940c88d86d1987a8f" title="Start a new thread.">sbthread_start</a>(<a class="code" href="structcmd__ln__t.html" title="Opaque structure used to hold the results of command-line parsing.">cmd_ln_t</a> *config, <a class="code" href="sbthread_8h.html#acb30b2ddcf70058f8bd38d68920be777" title="Entry point for a thread.">sbthread_main</a> func, <span class="keywordtype">void</span> *arg)
<a name="l00100"></a>00100 {
<a name="l00101"></a>00101 <a class="code" href="structsbthread__s.html">sbthread_t</a> *th;
<a name="l00102"></a>00102
<a name="l00103"></a>00103 th = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*th));
<a name="l00104"></a>00104 th->config = config;
<a name="l00105"></a>00105 th->func = func;
<a name="l00106"></a>00106 th->arg = arg;
<a name="l00107"></a>00107 th->msgq = <a class="code" href="sbthread_8h.html#a535a4d0d3f71c30f32d75b6268cc5e1e" title="Create a message queue.">sbmsgq_init</a>(256);
<a name="l00108"></a>00108 th->th = CreateThread(NULL, 0, sbthread_internal_main, th, 0, &th->tid);
<a name="l00109"></a>00109 <span class="keywordflow">if</span> (th->th == NULL) {
<a name="l00110"></a>00110 <a class="code" href="sbthread_8h.html#aa7827b760dfa47d95141f4896698e5c5" title="Free a thread object.">sbthread_free</a>(th);
<a name="l00111"></a>00111 <span class="keywordflow">return</span> NULL;
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113 <span class="keywordflow">return</span> th;
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="keywordtype">int</span>
<a name="l00117"></a>00117 <a class="code" href="sbthread_8h.html#a09c5c428b02b743c99d20bb2b11d964b" title="Wait for a thread to complete.">sbthread_wait</a>(<a class="code" href="structsbthread__s.html">sbthread_t</a> *th)
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 DWORD rv, exit;
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="comment">/* It has already been joined. */</span>
<a name="l00122"></a>00122 <span class="keywordflow">if</span> (th->th == NULL)
<a name="l00123"></a>00123 <span class="keywordflow">return</span> -1;
<a name="l00124"></a>00124
<a name="l00125"></a>00125 rv = WaitForSingleObject(th->th, INFINITE);
<a name="l00126"></a>00126 <span class="keywordflow">if</span> (rv == WAIT_FAILED) {
<a name="l00127"></a>00127 <a class="code" href="err_8h.html#a5f7b2f58f5a663a6bdd51f197ae21993" title="Print error message to standard error stream.">E_ERROR</a>(<span class="stringliteral">"Failed to join thread: WAIT_FAILED\n"</span>);
<a name="l00128"></a>00128 <span class="keywordflow">return</span> -1;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 GetExitCodeThread(th->th, &exit);
<a name="l00131"></a>00131 CloseHandle(th->th);
<a name="l00132"></a>00132 th->th = NULL;
<a name="l00133"></a>00133 <span class="keywordflow">return</span> (<span class="keywordtype">int</span>)exit;
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135
<a name="l00136"></a>00136 <span class="keyword">static</span> DWORD
<a name="l00137"></a>00137 cond_timed_wait(HANDLE cond, <span class="keywordtype">int</span> sec, <span class="keywordtype">int</span> nsec)
<a name="l00138"></a>00138 {
<a name="l00139"></a>00139 DWORD rv;
<a name="l00140"></a>00140 <span class="keywordflow">if</span> (sec == -1) {
<a name="l00141"></a>00141 rv = WaitForSingleObject(cond, INFINITE);
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143 <span class="keywordflow">else</span> {
<a name="l00144"></a>00144 DWORD ms;
<a name="l00145"></a>00145
<a name="l00146"></a>00146 ms = sec * 1000 + nsec / (1000*1000);
<a name="l00147"></a>00147 rv = WaitForSingleObject(cond, ms);
<a name="l00148"></a>00148 }
<a name="l00149"></a>00149 <span class="keywordflow">return</span> rv;
<a name="l00150"></a>00150 }
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="comment">/* Silvio Moioli: updated to use Unicode */</span>
<a name="l00153"></a>00153 <a class="code" href="structsbevent__s.html">sbevent_t</a> *
<a name="l00154"></a>00154 <a class="code" href="sbthread_8h.html#a1b3fa1cf6b82dcd82ab8d4124ab12490" title="Initialize an event.">sbevent_init</a>(<span class="keywordtype">void</span>)
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 <a class="code" href="structsbevent__s.html">sbevent_t</a> *evt;
<a name="l00157"></a>00157
<a name="l00158"></a>00158 evt = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*evt));
<a name="l00159"></a>00159 evt->evt = CreateEventW(NULL, FALSE, FALSE, NULL);
<a name="l00160"></a>00160 <span class="keywordflow">if</span> (evt->evt == NULL) {
<a name="l00161"></a>00161 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(evt);
<a name="l00162"></a>00162 <span class="keywordflow">return</span> NULL;
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164 <span class="keywordflow">return</span> evt;
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="keywordtype">void</span>
<a name="l00168"></a>00168 <a class="code" href="sbthread_8h.html#afe8253a0e804a019ad0d8c540eec75af" title="Free an event.">sbevent_free</a>(<a class="code" href="structsbevent__s.html">sbevent_t</a> *evt)
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170 CloseHandle(evt->evt);
<a name="l00171"></a>00171 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(evt);
<a name="l00172"></a>00172 }
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="keywordtype">int</span>
<a name="l00175"></a>00175 <a class="code" href="sbthread_8h.html#a7c01e3e70c2ab8e961d59db84aa5fa68" title="Signal an event.">sbevent_signal</a>(<a class="code" href="structsbevent__s.html">sbevent_t</a> *evt)
<a name="l00176"></a>00176 {
<a name="l00177"></a>00177 <span class="keywordflow">return</span> SetEvent(evt->evt) ? 0 : -1;
<a name="l00178"></a>00178 }
<a name="l00179"></a>00179
<a name="l00180"></a>00180 <span class="keywordtype">int</span>
<a name="l00181"></a>00181 <a class="code" href="sbthread_8h.html#ac211760e4dffccf0102db65fb6f2c5b3" title="Wait for an event to be signalled.">sbevent_wait</a>(<a class="code" href="structsbevent__s.html">sbevent_t</a> *evt, <span class="keywordtype">int</span> sec, <span class="keywordtype">int</span> nsec)
<a name="l00182"></a>00182 {
<a name="l00183"></a>00183 DWORD rv;
<a name="l00184"></a>00184
<a name="l00185"></a>00185 rv = cond_timed_wait(evt->evt, sec, nsec);
<a name="l00186"></a>00186 <span class="keywordflow">return</span> rv;
<a name="l00187"></a>00187 }
<a name="l00188"></a>00188
<a name="l00189"></a>00189 <a class="code" href="structsbmtx__s.html">sbmtx_t</a> *
<a name="l00190"></a>00190 <a class="code" href="sbthread_8h.html#a28067c5be5370074d21668620a68b229" title="Create a mutex.">sbmtx_init</a>(<span class="keywordtype">void</span>)
<a name="l00191"></a>00191 {
<a name="l00192"></a>00192 <a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx;
<a name="l00193"></a>00193
<a name="l00194"></a>00194 mtx = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*mtx));
<a name="l00195"></a>00195 InitializeCriticalSection(&mtx->mtx);
<a name="l00196"></a>00196 <span class="keywordflow">return</span> mtx;
<a name="l00197"></a>00197 }
<a name="l00198"></a>00198
<a name="l00199"></a>00199 <span class="keywordtype">int</span>
<a name="l00200"></a>00200 <a class="code" href="sbthread_8h.html#a3b86c81160360234944737b4eab73125" title="Try to acquire a mutex.">sbmtx_trylock</a>(<a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx)
<a name="l00201"></a>00201 {
<a name="l00202"></a>00202 <span class="keywordflow">return</span> TryEnterCriticalSection(&mtx->mtx) ? 0 : -1;
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204
<a name="l00205"></a>00205 <span class="keywordtype">int</span>
<a name="l00206"></a>00206 <a class="code" href="sbthread_8h.html#a6615e839f7c8ef3ebb6b288525f002cd" title="Acquire a mutex.">sbmtx_lock</a>(<a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx)
<a name="l00207"></a>00207 {
<a name="l00208"></a>00208 EnterCriticalSection(&mtx->mtx);
<a name="l00209"></a>00209 <span class="keywordflow">return</span> 0;
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <span class="keywordtype">int</span>
<a name="l00213"></a>00213 <a class="code" href="sbthread_8h.html#af65691258c916c68f1b5d000aaea233f" title="Release a mutex.">sbmtx_unlock</a>(<a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx)
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 LeaveCriticalSection(&mtx->mtx);
<a name="l00216"></a>00216 <span class="keywordflow">return</span> 0;
<a name="l00217"></a>00217 }
<a name="l00218"></a>00218
<a name="l00219"></a>00219 <span class="keywordtype">void</span>
<a name="l00220"></a>00220 <a class="code" href="sbthread_8h.html#aa17a6a93744eb813ca80bf098c69bdba" title="Dispose of a mutex.">sbmtx_free</a>(<a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx)
<a name="l00221"></a>00221 {
<a name="l00222"></a>00222 DeleteCriticalSection(&mtx->mtx);
<a name="l00223"></a>00223 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(mtx);
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225
<a name="l00226"></a>00226 <a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *
<a name="l00227"></a>00227 <a class="code" href="sbthread_8h.html#a535a4d0d3f71c30f32d75b6268cc5e1e" title="Create a message queue.">sbmsgq_init</a>(<span class="keywordtype">size_t</span> depth)
<a name="l00228"></a>00228 {
<a name="l00229"></a>00229 <a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *msgq;
<a name="l00230"></a>00230
<a name="l00231"></a>00231 msgq = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*msgq));
<a name="l00232"></a>00232 msgq->depth = depth;
<a name="l00233"></a>00233 msgq->evt = CreateEventW(NULL, FALSE, FALSE, NULL);
<a name="l00234"></a>00234 <span class="keywordflow">if</span> (msgq->evt == NULL) {
<a name="l00235"></a>00235 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(msgq);
<a name="l00236"></a>00236 <span class="keywordflow">return</span> NULL;
<a name="l00237"></a>00237 }
<a name="l00238"></a>00238 InitializeCriticalSection(&msgq->mtx);
<a name="l00239"></a>00239 msgq->data = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(depth, 1);
<a name="l00240"></a>00240 msgq->msg = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(depth, 1);
<a name="l00241"></a>00241 <span class="keywordflow">return</span> msgq;
<a name="l00242"></a>00242 }
<a name="l00243"></a>00243
<a name="l00244"></a>00244 <span class="keywordtype">void</span>
<a name="l00245"></a>00245 <a class="code" href="sbthread_8h.html#ab1ab59934422a5fac90ce0c4b66ffcc8" title="Free a message queue.">sbmsgq_free</a>(<a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *msgq)
<a name="l00246"></a>00246 {
<a name="l00247"></a>00247 CloseHandle(msgq->evt);
<a name="l00248"></a>00248 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(msgq->data);
<a name="l00249"></a>00249 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(msgq->msg);
<a name="l00250"></a>00250 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(msgq);
<a name="l00251"></a>00251 }
<a name="l00252"></a>00252
<a name="l00253"></a>00253 <span class="keywordtype">int</span>
<a name="l00254"></a>00254 <a class="code" href="sbthread_8h.html#ab0591b5cb626be52dd22edf8fa13a3e3" title="Post a message to a queue.">sbmsgq_send</a>(<a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *q, <span class="keywordtype">size_t</span> len, <span class="keywordtype">void</span> <span class="keyword">const</span> *data)
<a name="l00255"></a>00255 {
<a name="l00256"></a>00256 <span class="keywordtype">char</span> <span class="keyword">const</span> *cdata = (<span class="keywordtype">char</span> <span class="keyword">const</span> *)data;
<a name="l00257"></a>00257 <span class="keywordtype">size_t</span> in;
<a name="l00258"></a>00258
<a name="l00259"></a>00259 <span class="comment">/* Don't allow things bigger than depth to be sent! */</span>
<a name="l00260"></a>00260 <span class="keywordflow">if</span> (len + <span class="keyword">sizeof</span>(len) > q->depth)
<a name="l00261"></a>00261 <span class="keywordflow">return</span> -1;
<a name="l00262"></a>00262
<a name="l00263"></a>00263 <span class="keywordflow">if</span> (q->nbytes + len + <span class="keyword">sizeof</span>(len) > q->depth)
<a name="l00264"></a>00264 WaitForSingleObject(q->evt, INFINITE);
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <span class="comment">/* Lock things while we manipulate the buffer (FIXME: this</span>
<a name="l00267"></a>00267 <span class="comment"> actually should have been atomic with the wait above ...) */</span>
<a name="l00268"></a>00268 EnterCriticalSection(&q->mtx);
<a name="l00269"></a>00269 in = (q->out + q->nbytes) % q->depth;
<a name="l00270"></a>00270 <span class="comment">/* First write the size of the message. */</span>
<a name="l00271"></a>00271 if (in + <span class="keyword">sizeof</span>(len) > q->depth) {
<a name="l00272"></a>00272 <span class="comment">/* Handle the annoying case where the size field gets wrapped around. */</span>
<a name="l00273"></a>00273 <span class="keywordtype">size_t</span> len1 = q->depth - in;
<a name="l00274"></a>00274 memcpy(q->data + in, &len, len1);
<a name="l00275"></a>00275 memcpy(q->data, ((<span class="keywordtype">char</span> *)&len) + len1, <span class="keyword">sizeof</span>(len) - len1);
<a name="l00276"></a>00276 q->nbytes += <span class="keyword">sizeof</span>(len);
<a name="l00277"></a>00277 in = <span class="keyword">sizeof</span>(len) - len1;
<a name="l00278"></a>00278 }
<a name="l00279"></a>00279 <span class="keywordflow">else</span> {
<a name="l00280"></a>00280 memcpy(q->data + in, &len, <span class="keyword">sizeof</span>(len));
<a name="l00281"></a>00281 q->nbytes += <span class="keyword">sizeof</span>(len);
<a name="l00282"></a>00282 in += <span class="keyword">sizeof</span>(len);
<a name="l00283"></a>00283 }
<a name="l00284"></a>00284
<a name="l00285"></a>00285 <span class="comment">/* Now write the message body. */</span>
<a name="l00286"></a>00286 <span class="keywordflow">if</span> (in + len > q->depth) {
<a name="l00287"></a>00287 <span class="comment">/* Handle wraparound. */</span>
<a name="l00288"></a>00288 <span class="keywordtype">size_t</span> len1 = q->depth - in;
<a name="l00289"></a>00289 memcpy(q->data + in, cdata, len1);
<a name="l00290"></a>00290 q->nbytes += len1;
<a name="l00291"></a>00291 cdata += len1;
<a name="l00292"></a>00292 len -= len1;
<a name="l00293"></a>00293 in = 0;
<a name="l00294"></a>00294 }
<a name="l00295"></a>00295 memcpy(q->data + in, cdata, len);
<a name="l00296"></a>00296 q->nbytes += len;
<a name="l00297"></a>00297
<a name="l00298"></a>00298 <span class="comment">/* Signal the condition variable. */</span>
<a name="l00299"></a>00299 SetEvent(q->evt);
<a name="l00300"></a>00300 <span class="comment">/* Unlock. */</span>
<a name="l00301"></a>00301 LeaveCriticalSection(&q->mtx);
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <span class="keywordflow">return</span> 0;
<a name="l00304"></a>00304 }
<a name="l00305"></a>00305
<a name="l00306"></a>00306 <span class="keywordtype">void</span> *
<a name="l00307"></a>00307 <a class="code" href="sbthread_8h.html#ab3a421d172a92ef5ad371442a66767b5" title="Wait for a message from a queue.">sbmsgq_wait</a>(<a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *q, <span class="keywordtype">size_t</span> *out_len, <span class="keywordtype">int</span> sec, <span class="keywordtype">int</span> nsec)
<a name="l00308"></a>00308 {
<a name="l00309"></a>00309 <span class="keywordtype">char</span> *outptr;
<a name="l00310"></a>00310 <span class="keywordtype">size_t</span> len;
<a name="l00311"></a>00311
<a name="l00312"></a>00312 <span class="comment">/* Wait for data to be available. */</span>
<a name="l00313"></a>00313 <span class="keywordflow">if</span> (q->nbytes == 0) {
<a name="l00314"></a>00314 <span class="keywordflow">if</span> (cond_timed_wait(q->evt, sec, nsec) == WAIT_FAILED)
<a name="l00315"></a>00315 <span class="comment">/* Timed out or something... */</span>
<a name="l00316"></a>00316 <span class="keywordflow">return</span> NULL;
<a name="l00317"></a>00317 }
<a name="l00318"></a>00318 <span class="comment">/* Lock to manipulate the queue (FIXME) */</span>
<a name="l00319"></a>00319 EnterCriticalSection(&q->mtx);
<a name="l00320"></a>00320 <span class="comment">/* Get the message size. */</span>
<a name="l00321"></a>00321 <span class="keywordflow">if</span> (q->out + <span class="keyword">sizeof</span>(q->msglen) > q->depth) {
<a name="l00322"></a>00322 <span class="comment">/* Handle annoying wraparound case. */</span>
<a name="l00323"></a>00323 <span class="keywordtype">size_t</span> len1 = q->depth - q->out;
<a name="l00324"></a>00324 memcpy(&q->msglen, q->data + q->out, len1);
<a name="l00325"></a>00325 memcpy(((<span class="keywordtype">char</span> *)&q->msglen) + len1, q->data,
<a name="l00326"></a>00326 <span class="keyword">sizeof</span>(q->msglen) - len1);
<a name="l00327"></a>00327 q->out = <span class="keyword">sizeof</span>(q->msglen) - len1;
<a name="l00328"></a>00328 }
<a name="l00329"></a>00329 <span class="keywordflow">else</span> {
<a name="l00330"></a>00330 memcpy(&q->msglen, q->data + q->out, <span class="keyword">sizeof</span>(q->msglen));
<a name="l00331"></a>00331 q->out += <span class="keyword">sizeof</span>(q->msglen);
<a name="l00332"></a>00332 }
<a name="l00333"></a>00333 q->nbytes -= <span class="keyword">sizeof</span>(q->msglen);
<a name="l00334"></a>00334 <span class="comment">/* Get the message body. */</span>
<a name="l00335"></a>00335 outptr = q->msg;
<a name="l00336"></a>00336 len = q->msglen;
<a name="l00337"></a>00337 <span class="keywordflow">if</span> (q->out + q->msglen > q->depth) {
<a name="l00338"></a>00338 <span class="comment">/* Handle wraparound. */</span>
<a name="l00339"></a>00339 <span class="keywordtype">size_t</span> len1 = q->depth - q->out;
<a name="l00340"></a>00340 memcpy(outptr, q->data + q->out, len1);
<a name="l00341"></a>00341 outptr += len1;
<a name="l00342"></a>00342 len -= len1;
<a name="l00343"></a>00343 q->nbytes -= len1;
<a name="l00344"></a>00344 q->out = 0;
<a name="l00345"></a>00345 }
<a name="l00346"></a>00346 memcpy(outptr, q->data + q->out, len);
<a name="l00347"></a>00347 q->nbytes -= len;
<a name="l00348"></a>00348 q->out += len;
<a name="l00349"></a>00349
<a name="l00350"></a>00350 <span class="comment">/* Signal the condition variable. */</span>
<a name="l00351"></a>00351 SetEvent(q->evt);
<a name="l00352"></a>00352 <span class="comment">/* Unlock. */</span>
<a name="l00353"></a>00353 LeaveCriticalSection(&q->mtx);
<a name="l00354"></a>00354 <span class="keywordflow">if</span> (out_len)
<a name="l00355"></a>00355 *out_len = q->msglen;
<a name="l00356"></a>00356 <span class="keywordflow">return</span> q->msg;
<a name="l00357"></a>00357 }
<a name="l00358"></a>00358
<a name="l00359"></a>00359 <span class="preprocessor">#else </span><span class="comment">/* POSIX */</span>
<a name="l00360"></a>00360 <span class="preprocessor">#include <pthread.h></span>
<a name="l00361"></a>00361 <span class="preprocessor">#include <sys/time.h></span>
<a name="l00362"></a>00362
<a name="l00363"></a><a class="code" href="structsbthread__s.html">00363</a> <span class="keyword">struct </span><a class="code" href="structsbthread__s.html">sbthread_s</a> {
<a name="l00364"></a>00364 <a class="code" href="structcmd__ln__t.html" title="Opaque structure used to hold the results of command-line parsing.">cmd_ln_t</a> *config;
<a name="l00365"></a>00365 <a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *msgq;
<a name="l00366"></a>00366 <a class="code" href="sbthread_8h.html#acb30b2ddcf70058f8bd38d68920be777" title="Entry point for a thread.">sbthread_main</a> func;
<a name="l00367"></a>00367 <span class="keywordtype">void</span> *arg;
<a name="l00368"></a>00368 pthread_t th;
<a name="l00369"></a>00369 };
<a name="l00370"></a>00370
<a name="l00371"></a><a class="code" href="structsbmsgq__s.html">00371</a> <span class="keyword">struct </span><a class="code" href="structsbmsgq__s.html">sbmsgq_s</a> {
<a name="l00372"></a>00372 <span class="comment">/* Ringbuffer for passing messages. */</span>
<a name="l00373"></a>00373 <span class="keywordtype">char</span> *data;
<a name="l00374"></a>00374 <span class="keywordtype">size_t</span> depth;
<a name="l00375"></a>00375 <span class="keywordtype">size_t</span> out;
<a name="l00376"></a>00376 <span class="keywordtype">size_t</span> nbytes;
<a name="l00377"></a>00377
<a name="l00378"></a>00378 <span class="comment">/* Current message is stored here. */</span>
<a name="l00379"></a>00379 <span class="keywordtype">char</span> *msg;
<a name="l00380"></a>00380 <span class="keywordtype">size_t</span> msglen;
<a name="l00381"></a>00381 pthread_mutex_t mtx;
<a name="l00382"></a>00382 pthread_cond_t cond;
<a name="l00383"></a>00383 };
<a name="l00384"></a>00384
<a name="l00385"></a><a class="code" href="structsbevent__s.html">00385</a> <span class="keyword">struct </span><a class="code" href="structsbevent__s.html">sbevent_s</a> {
<a name="l00386"></a>00386 pthread_mutex_t mtx;
<a name="l00387"></a>00387 pthread_cond_t cond;
<a name="l00388"></a>00388 <span class="keywordtype">int</span> signalled;
<a name="l00389"></a>00389 };
<a name="l00390"></a>00390
<a name="l00391"></a><a class="code" href="structsbmtx__s.html">00391</a> <span class="keyword">struct </span><a class="code" href="structsbmtx__s.html">sbmtx_s</a> {
<a name="l00392"></a>00392 pthread_mutex_t mtx;
<a name="l00393"></a>00393 };
<a name="l00394"></a>00394
<a name="l00395"></a>00395 <span class="keyword">static</span> <span class="keywordtype">void</span> *
<a name="l00396"></a>00396 sbthread_internal_main(<span class="keywordtype">void</span> *arg)
<a name="l00397"></a>00397 {
<a name="l00398"></a>00398 <a class="code" href="structsbthread__s.html">sbthread_t</a> *th = (<a class="code" href="structsbthread__s.html">sbthread_t</a> *)arg;
<a name="l00399"></a>00399 <span class="keywordtype">int</span> rv;
<a name="l00400"></a>00400
<a name="l00401"></a>00401 rv = (*th->func)(th);
<a name="l00402"></a>00402 <span class="keywordflow">return</span> (<span class="keywordtype">void</span> *)(long)rv;
<a name="l00403"></a>00403 }
<a name="l00404"></a>00404
<a name="l00405"></a>00405 <a class="code" href="structsbthread__s.html">sbthread_t</a> *
<a name="l00406"></a><a class="code" href="sbthread_8c.html#a0ba06f52feda5c218dc38373e930017c">00406</a> <a class="code" href="sbthread_8h.html#abfe1f703f4e17a2940c88d86d1987a8f" title="Start a new thread.">sbthread_start</a>(<a class="code" href="structcmd__ln__t.html" title="Opaque structure used to hold the results of command-line parsing.">cmd_ln_t</a> *config, <a class="code" href="sbthread_8h.html#acb30b2ddcf70058f8bd38d68920be777" title="Entry point for a thread.">sbthread_main</a> func, <span class="keywordtype">void</span> *arg)
<a name="l00407"></a>00407 {
<a name="l00408"></a>00408 <a class="code" href="structsbthread__s.html">sbthread_t</a> *th;
<a name="l00409"></a>00409 <span class="keywordtype">int</span> rv;
<a name="l00410"></a>00410
<a name="l00411"></a>00411 th = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*th));
<a name="l00412"></a>00412 th->config = config;
<a name="l00413"></a>00413 th->func = func;
<a name="l00414"></a>00414 th->arg = arg;
<a name="l00415"></a>00415 th->msgq = <a class="code" href="sbthread_8h.html#a535a4d0d3f71c30f32d75b6268cc5e1e" title="Create a message queue.">sbmsgq_init</a>(1024);
<a name="l00416"></a>00416 <span class="keywordflow">if</span> ((rv = pthread_create(&th->th, NULL, &sbthread_internal_main, th)) != 0) {
<a name="l00417"></a>00417 <a class="code" href="err_8h.html#a5f7b2f58f5a663a6bdd51f197ae21993" title="Print error message to standard error stream.">E_ERROR</a>(<span class="stringliteral">"Failed to create thread: %d\n"</span>, rv);
<a name="l00418"></a>00418 <a class="code" href="sbthread_8h.html#aa7827b760dfa47d95141f4896698e5c5" title="Free a thread object.">sbthread_free</a>(th);
<a name="l00419"></a>00419 <span class="keywordflow">return</span> NULL;
<a name="l00420"></a>00420 }
<a name="l00421"></a>00421 <span class="keywordflow">return</span> th;
<a name="l00422"></a>00422 }
<a name="l00423"></a>00423
<a name="l00424"></a>00424 <span class="keywordtype">int</span>
<a name="l00425"></a><a class="code" href="sbthread_8c.html#ad4cc725834be72ea986f80c4f4ecb24d">00425</a> <a class="code" href="sbthread_8h.html#a09c5c428b02b743c99d20bb2b11d964b" title="Wait for a thread to complete.">sbthread_wait</a>(<a class="code" href="structsbthread__s.html">sbthread_t</a> *th)
<a name="l00426"></a>00426 {
<a name="l00427"></a>00427 <span class="keywordtype">void</span> *exit;
<a name="l00428"></a>00428 <span class="keywordtype">int</span> rv;
<a name="l00429"></a>00429
<a name="l00430"></a>00430 <span class="comment">/* It has already been joined. */</span>
<a name="l00431"></a>00431 <span class="keywordflow">if</span> (th->th == (pthread_t)-1)
<a name="l00432"></a>00432 <span class="keywordflow">return</span> -1;
<a name="l00433"></a>00433
<a name="l00434"></a>00434 rv = pthread_join(th->th, &exit);
<a name="l00435"></a>00435 <span class="keywordflow">if</span> (rv != 0) {
<a name="l00436"></a>00436 <a class="code" href="err_8h.html#a5f7b2f58f5a663a6bdd51f197ae21993" title="Print error message to standard error stream.">E_ERROR</a>(<span class="stringliteral">"Failed to join thread: %d\n"</span>, rv);
<a name="l00437"></a>00437 <span class="keywordflow">return</span> -1;
<a name="l00438"></a>00438 }
<a name="l00439"></a>00439 th->th = (pthread_t)-1;
<a name="l00440"></a>00440 <span class="keywordflow">return</span> (<span class="keywordtype">int</span>)(long)exit;
<a name="l00441"></a>00441 }
<a name="l00442"></a>00442
<a name="l00443"></a>00443 <a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *
<a name="l00444"></a><a class="code" href="sbthread_8c.html#a76852d201655b6f08ed6c35f6ebf8b4b">00444</a> <a class="code" href="sbthread_8h.html#a535a4d0d3f71c30f32d75b6268cc5e1e" title="Create a message queue.">sbmsgq_init</a>(<span class="keywordtype">size_t</span> depth)
<a name="l00445"></a>00445 {
<a name="l00446"></a>00446 <a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *msgq;
<a name="l00447"></a>00447
<a name="l00448"></a>00448 msgq = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*msgq));
<a name="l00449"></a>00449 msgq->depth = depth;
<a name="l00450"></a>00450 <span class="keywordflow">if</span> (pthread_cond_init(&msgq->cond, NULL) != 0) {
<a name="l00451"></a>00451 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(msgq);
<a name="l00452"></a>00452 <span class="keywordflow">return</span> NULL;
<a name="l00453"></a>00453 }
<a name="l00454"></a>00454 <span class="keywordflow">if</span> (pthread_mutex_init(&msgq->mtx, NULL) != 0) {
<a name="l00455"></a>00455 pthread_cond_destroy(&msgq->cond);
<a name="l00456"></a>00456 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(msgq);
<a name="l00457"></a>00457 <span class="keywordflow">return</span> NULL;
<a name="l00458"></a>00458 }
<a name="l00459"></a>00459 msgq->data = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(depth, 1);
<a name="l00460"></a>00460 msgq->msg = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(depth, 1);
<a name="l00461"></a>00461 <span class="keywordflow">return</span> msgq;
<a name="l00462"></a>00462 }
<a name="l00463"></a>00463
<a name="l00464"></a>00464 <span class="keywordtype">void</span>
<a name="l00465"></a><a class="code" href="sbthread_8c.html#aa8483d06a1456207643abcfebc3b2e0a">00465</a> <a class="code" href="sbthread_8h.html#ab1ab59934422a5fac90ce0c4b66ffcc8" title="Free a message queue.">sbmsgq_free</a>(<a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *msgq)
<a name="l00466"></a>00466 {
<a name="l00467"></a>00467 pthread_mutex_destroy(&msgq->mtx);
<a name="l00468"></a>00468 pthread_cond_destroy(&msgq->cond);
<a name="l00469"></a>00469 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(msgq->data);
<a name="l00470"></a>00470 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(msgq->msg);
<a name="l00471"></a>00471 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(msgq);
<a name="l00472"></a>00472 }
<a name="l00473"></a>00473
<a name="l00474"></a>00474 <span class="keywordtype">int</span>
<a name="l00475"></a><a class="code" href="sbthread_8c.html#ae6c214bf1fab2f10cb51648b7e736698">00475</a> <a class="code" href="sbthread_8h.html#ab0591b5cb626be52dd22edf8fa13a3e3" title="Post a message to a queue.">sbmsgq_send</a>(<a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *q, <span class="keywordtype">size_t</span> len, <span class="keywordtype">void</span> <span class="keyword">const</span> *data)
<a name="l00476"></a>00476 {
<a name="l00477"></a>00477 <span class="keywordtype">size_t</span> in;
<a name="l00478"></a>00478
<a name="l00479"></a>00479 <span class="comment">/* Don't allow things bigger than depth to be sent! */</span>
<a name="l00480"></a>00480 <span class="keywordflow">if</span> (len + <span class="keyword">sizeof</span>(len) > q->depth)
<a name="l00481"></a>00481 <span class="keywordflow">return</span> -1;
<a name="l00482"></a>00482
<a name="l00483"></a>00483 <span class="comment">/* Lock the condition variable while we manipulate the buffer. */</span>
<a name="l00484"></a>00484 pthread_mutex_lock(&q->mtx);
<a name="l00485"></a>00485 <span class="keywordflow">if</span> (q->nbytes + len + <span class="keyword">sizeof</span>(len) > q->depth) {
<a name="l00486"></a>00486 <span class="comment">/* Unlock and wait for space to be available. */</span>
<a name="l00487"></a>00487 <span class="keywordflow">if</span> (pthread_cond_wait(&q->cond, &q->mtx) != 0) {
<a name="l00488"></a>00488 <span class="comment">/* Timed out, don't send anything. */</span>
<a name="l00489"></a>00489 pthread_mutex_unlock(&q->mtx);
<a name="l00490"></a>00490 <span class="keywordflow">return</span> -1;
<a name="l00491"></a>00491 }
<a name="l00492"></a>00492 <span class="comment">/* Condition is now locked again. */</span>
<a name="l00493"></a>00493 }
<a name="l00494"></a>00494 in = (q->out + q->nbytes) % q->depth;
<a name="l00495"></a>00495
<a name="l00496"></a>00496 <span class="comment">/* First write the size of the message. */</span>
<a name="l00497"></a>00497 if (in + <span class="keyword">sizeof</span>(len) > q->depth) {
<a name="l00498"></a>00498 <span class="comment">/* Handle the annoying case where the size field gets wrapped around. */</span>
<a name="l00499"></a>00499 <span class="keywordtype">size_t</span> len1 = q->depth - in;
<a name="l00500"></a>00500 memcpy(q->data + in, &len, len1);
<a name="l00501"></a>00501 memcpy(q->data, ((<span class="keywordtype">char</span> *)&len) + len1, <span class="keyword">sizeof</span>(len) - len1);
<a name="l00502"></a>00502 q->nbytes += <span class="keyword">sizeof</span>(len);
<a name="l00503"></a>00503 in = <span class="keyword">sizeof</span>(len) - len1;
<a name="l00504"></a>00504 }
<a name="l00505"></a>00505 <span class="keywordflow">else</span> {
<a name="l00506"></a>00506 memcpy(q->data + in, &len, <span class="keyword">sizeof</span>(len));
<a name="l00507"></a>00507 q->nbytes += <span class="keyword">sizeof</span>(len);
<a name="l00508"></a>00508 in += <span class="keyword">sizeof</span>(len);
<a name="l00509"></a>00509 }
<a name="l00510"></a>00510
<a name="l00511"></a>00511 <span class="comment">/* Now write the message body. */</span>
<a name="l00512"></a>00512 <span class="keywordflow">if</span> (in + len > q->depth) {
<a name="l00513"></a>00513 <span class="comment">/* Handle wraparound. */</span>
<a name="l00514"></a>00514 <span class="keywordtype">size_t</span> len1 = q->depth - in;
<a name="l00515"></a>00515 memcpy(q->data + in, data, len1);
<a name="l00516"></a>00516 q->nbytes += len1;
<a name="l00517"></a>00517 data = (<span class="keywordtype">char</span> <span class="keyword">const</span> *)data + len1;
<a name="l00518"></a>00518 len -= len1;
<a name="l00519"></a>00519 in = 0;
<a name="l00520"></a>00520 }
<a name="l00521"></a>00521 memcpy(q->data + in, data, len);
<a name="l00522"></a>00522 q->nbytes += len;
<a name="l00523"></a>00523
<a name="l00524"></a>00524 <span class="comment">/* Signal the condition variable. */</span>
<a name="l00525"></a>00525 pthread_cond_signal(&q->cond);
<a name="l00526"></a>00526 <span class="comment">/* Unlock it, we have nothing else to do. */</span>
<a name="l00527"></a>00527 pthread_mutex_unlock(&q->mtx);
<a name="l00528"></a>00528 <span class="keywordflow">return</span> 0;
<a name="l00529"></a>00529 }
<a name="l00530"></a>00530
<a name="l00531"></a>00531 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00532"></a>00532 cond_timed_wait(pthread_cond_t *cond, pthread_mutex_t *mtx, <span class="keywordtype">int</span> sec, <span class="keywordtype">int</span> nsec)
<a name="l00533"></a>00533 {
<a name="l00534"></a>00534 <span class="keywordtype">int</span> rv;
<a name="l00535"></a>00535 <span class="keywordflow">if</span> (sec == -1) {
<a name="l00536"></a>00536 rv = pthread_cond_wait(cond, mtx);
<a name="l00537"></a>00537 }
<a name="l00538"></a>00538 <span class="keywordflow">else</span> {
<a name="l00539"></a>00539 <span class="keyword">struct </span>timeval now;
<a name="l00540"></a>00540 <span class="keyword">struct </span>timespec end;
<a name="l00541"></a>00541
<a name="l00542"></a>00542 gettimeofday(&now, NULL);
<a name="l00543"></a>00543 end.tv_sec = now.tv_sec + sec;
<a name="l00544"></a>00544 end.tv_nsec = now.tv_usec * 1000 + nsec;
<a name="l00545"></a>00545 <span class="keywordflow">if</span> (end.tv_nsec > (1000*1000*1000)) {
<a name="l00546"></a>00546 sec += end.tv_nsec / (1000*1000*1000);
<a name="l00547"></a>00547 end.tv_nsec = end.tv_nsec % (1000*1000*1000);
<a name="l00548"></a>00548 }
<a name="l00549"></a>00549 rv = pthread_cond_timedwait(cond, mtx, &end);
<a name="l00550"></a>00550 }
<a name="l00551"></a>00551 <span class="keywordflow">return</span> rv;
<a name="l00552"></a>00552 }
<a name="l00553"></a>00553
<a name="l00554"></a>00554 <span class="keywordtype">void</span> *
<a name="l00555"></a><a class="code" href="sbthread_8c.html#a5ef0a82190db1efc97e5921d2f822535">00555</a> <a class="code" href="sbthread_8h.html#ab3a421d172a92ef5ad371442a66767b5" title="Wait for a message from a queue.">sbmsgq_wait</a>(<a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *q, <span class="keywordtype">size_t</span> *out_len, <span class="keywordtype">int</span> sec, <span class="keywordtype">int</span> nsec)
<a name="l00556"></a>00556 {
<a name="l00557"></a>00557 <span class="keywordtype">char</span> *outptr;
<a name="l00558"></a>00558 <span class="keywordtype">size_t</span> len;
<a name="l00559"></a>00559
<a name="l00560"></a>00560 <span class="comment">/* Lock the condition variable while we manipulate nmsg. */</span>
<a name="l00561"></a>00561 pthread_mutex_lock(&q->mtx);
<a name="l00562"></a>00562 <span class="keywordflow">if</span> (q->nbytes == 0) {
<a name="l00563"></a>00563 <span class="comment">/* Unlock the condition variable and wait for a signal. */</span>
<a name="l00564"></a>00564 <span class="keywordflow">if</span> (cond_timed_wait(&q->cond, &q->mtx, sec, nsec) != 0) {
<a name="l00565"></a>00565 <span class="comment">/* Timed out or something... */</span>
<a name="l00566"></a>00566 pthread_mutex_unlock(&q->mtx);
<a name="l00567"></a>00567 <span class="keywordflow">return</span> NULL;
<a name="l00568"></a>00568 }
<a name="l00569"></a>00569 <span class="comment">/* Condition variable is now locked again. */</span>
<a name="l00570"></a>00570 }
<a name="l00571"></a>00571 <span class="comment">/* Get the message size. */</span>
<a name="l00572"></a>00572 <span class="keywordflow">if</span> (q->out + <span class="keyword">sizeof</span>(q->msglen) > q->depth) {
<a name="l00573"></a>00573 <span class="comment">/* Handle annoying wraparound case. */</span>
<a name="l00574"></a>00574 <span class="keywordtype">size_t</span> len1 = q->depth - q->out;
<a name="l00575"></a>00575 memcpy(&q->msglen, q->data + q->out, len1);
<a name="l00576"></a>00576 memcpy(((<span class="keywordtype">char</span> *)&q->msglen) + len1, q->data,
<a name="l00577"></a>00577 <span class="keyword">sizeof</span>(q->msglen) - len1);
<a name="l00578"></a>00578 q->out = <span class="keyword">sizeof</span>(q->msglen) - len1;
<a name="l00579"></a>00579 }
<a name="l00580"></a>00580 <span class="keywordflow">else</span> {
<a name="l00581"></a>00581 memcpy(&q->msglen, q->data + q->out, <span class="keyword">sizeof</span>(q->msglen));
<a name="l00582"></a>00582 q->out += <span class="keyword">sizeof</span>(q->msglen);
<a name="l00583"></a>00583 }
<a name="l00584"></a>00584 q->nbytes -= <span class="keyword">sizeof</span>(q->msglen);
<a name="l00585"></a>00585 <span class="comment">/* Get the message body. */</span>
<a name="l00586"></a>00586 outptr = q->msg;
<a name="l00587"></a>00587 len = q->msglen;
<a name="l00588"></a>00588 <span class="keywordflow">if</span> (q->out + q->msglen > q->depth) {
<a name="l00589"></a>00589 <span class="comment">/* Handle wraparound. */</span>
<a name="l00590"></a>00590 <span class="keywordtype">size_t</span> len1 = q->depth - q->out;
<a name="l00591"></a>00591 memcpy(outptr, q->data + q->out, len1);
<a name="l00592"></a>00592 outptr += len1;
<a name="l00593"></a>00593 len -= len1;
<a name="l00594"></a>00594 q->nbytes -= len1;
<a name="l00595"></a>00595 q->out = 0;
<a name="l00596"></a>00596 }
<a name="l00597"></a>00597 memcpy(outptr, q->data + q->out, len);
<a name="l00598"></a>00598 q->nbytes -= len;
<a name="l00599"></a>00599 q->out += len;
<a name="l00600"></a>00600
<a name="l00601"></a>00601 <span class="comment">/* Signal the condition variable. */</span>
<a name="l00602"></a>00602 pthread_cond_signal(&q->cond);
<a name="l00603"></a>00603 <span class="comment">/* Unlock the condition variable, we are done. */</span>
<a name="l00604"></a>00604 pthread_mutex_unlock(&q->mtx);
<a name="l00605"></a>00605 <span class="keywordflow">if</span> (out_len)
<a name="l00606"></a>00606 *out_len = q->msglen;
<a name="l00607"></a>00607 <span class="keywordflow">return</span> q->msg;
<a name="l00608"></a>00608 }
<a name="l00609"></a>00609
<a name="l00610"></a>00610 <a class="code" href="structsbevent__s.html">sbevent_t</a> *
<a name="l00611"></a><a class="code" href="sbthread_8c.html#ad6f018be06301acbfd2b41888ca1d345">00611</a> <a class="code" href="sbthread_8h.html#a1b3fa1cf6b82dcd82ab8d4124ab12490" title="Initialize an event.">sbevent_init</a>(<span class="keywordtype">void</span>)
<a name="l00612"></a>00612 {
<a name="l00613"></a>00613 <a class="code" href="structsbevent__s.html">sbevent_t</a> *evt;
<a name="l00614"></a>00614 <span class="keywordtype">int</span> rv;
<a name="l00615"></a>00615
<a name="l00616"></a>00616 evt = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*evt));
<a name="l00617"></a>00617 <span class="keywordflow">if</span> ((rv = pthread_mutex_init(&evt->mtx, NULL)) != 0) {
<a name="l00618"></a>00618 <a class="code" href="err_8h.html#a5f7b2f58f5a663a6bdd51f197ae21993" title="Print error message to standard error stream.">E_ERROR</a>(<span class="stringliteral">"Failed to initialize mutex: %d\n"</span>, rv);
<a name="l00619"></a>00619 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(evt);
<a name="l00620"></a>00620 <span class="keywordflow">return</span> NULL;
<a name="l00621"></a>00621 }
<a name="l00622"></a>00622 <span class="keywordflow">if</span> ((rv = pthread_cond_init(&evt->cond, NULL)) != 0) {
<a name="l00623"></a>00623 <a class="code" href="err_8h.html#a54ffbfe898d74595c586a1f48f32ef03" title="Print error text; Call perror(&quot;&quot;);.">E_ERROR_SYSTEM</a>(<span class="stringliteral">"Failed to initialize mutex: %d\n"</span>, rv);
<a name="l00624"></a>00624 pthread_mutex_destroy(&evt->mtx);
<a name="l00625"></a>00625 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(evt);
<a name="l00626"></a>00626 <span class="keywordflow">return</span> NULL;
<a name="l00627"></a>00627 }
<a name="l00628"></a>00628 <span class="keywordflow">return</span> evt;
<a name="l00629"></a>00629 }
<a name="l00630"></a>00630
<a name="l00631"></a>00631 <span class="keywordtype">void</span>
<a name="l00632"></a><a class="code" href="sbthread_8c.html#abba6d18d863334a98eecbaf5ffe81ab1">00632</a> <a class="code" href="sbthread_8h.html#afe8253a0e804a019ad0d8c540eec75af" title="Free an event.">sbevent_free</a>(<a class="code" href="structsbevent__s.html">sbevent_t</a> *evt)
<a name="l00633"></a>00633 {
<a name="l00634"></a>00634 pthread_mutex_destroy(&evt->mtx);
<a name="l00635"></a>00635 pthread_cond_destroy(&evt->cond);
<a name="l00636"></a>00636 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(evt);
<a name="l00637"></a>00637 }
<a name="l00638"></a>00638
<a name="l00639"></a>00639 <span class="keywordtype">int</span>
<a name="l00640"></a><a class="code" href="sbthread_8c.html#a89f88d25e27146dc7e4956211e69a6d5">00640</a> <a class="code" href="sbthread_8h.html#a7c01e3e70c2ab8e961d59db84aa5fa68" title="Signal an event.">sbevent_signal</a>(<a class="code" href="structsbevent__s.html">sbevent_t</a> *evt)
<a name="l00641"></a>00641 {
<a name="l00642"></a>00642 <span class="keywordtype">int</span> rv;
<a name="l00643"></a>00643
<a name="l00644"></a>00644 pthread_mutex_lock(&evt->mtx);
<a name="l00645"></a>00645 evt->signalled = TRUE;
<a name="l00646"></a>00646 rv = pthread_cond_signal(&evt->cond);
<a name="l00647"></a>00647 pthread_mutex_unlock(&evt->mtx);
<a name="l00648"></a>00648 <span class="keywordflow">return</span> rv;
<a name="l00649"></a>00649 }
<a name="l00650"></a>00650
<a name="l00651"></a>00651 <span class="keywordtype">int</span>
<a name="l00652"></a><a class="code" href="sbthread_8c.html#a9f48001ca75395a3b192902b37edd5e0">00652</a> <a class="code" href="sbthread_8h.html#ac211760e4dffccf0102db65fb6f2c5b3" title="Wait for an event to be signalled.">sbevent_wait</a>(<a class="code" href="structsbevent__s.html">sbevent_t</a> *evt, <span class="keywordtype">int</span> sec, <span class="keywordtype">int</span> nsec)
<a name="l00653"></a>00653 {
<a name="l00654"></a>00654 <span class="keywordtype">int</span> rv = 0;
<a name="l00655"></a>00655
<a name="l00656"></a>00656 <span class="comment">/* Lock the mutex before we check its signalled state. */</span>
<a name="l00657"></a>00657 pthread_mutex_lock(&evt->mtx);
<a name="l00658"></a>00658 <span class="comment">/* If it's not signalled, then wait until it is. */</span>
<a name="l00659"></a>00659 <span class="keywordflow">if</span> (!evt->signalled)
<a name="l00660"></a>00660 rv = cond_timed_wait(&evt->cond, &evt->mtx, sec, nsec);
<a name="l00661"></a>00661 <span class="comment">/* Set its state to unsignalled if we were successful. */</span>
<a name="l00662"></a>00662 <span class="keywordflow">if</span> (rv == 0)
<a name="l00663"></a>00663 evt->signalled = FALSE;
<a name="l00664"></a>00664 <span class="comment">/* And unlock its mutex. */</span>
<a name="l00665"></a>00665 pthread_mutex_unlock(&evt->mtx);
<a name="l00666"></a>00666
<a name="l00667"></a>00667 <span class="keywordflow">return</span> rv;
<a name="l00668"></a>00668 }
<a name="l00669"></a>00669
<a name="l00670"></a>00670 <a class="code" href="structsbmtx__s.html">sbmtx_t</a> *
<a name="l00671"></a><a class="code" href="sbthread_8c.html#a690fb21b06b7ef9f958a4a204bc04269">00671</a> <a class="code" href="sbthread_8h.html#a28067c5be5370074d21668620a68b229" title="Create a mutex.">sbmtx_init</a>(<span class="keywordtype">void</span>)
<a name="l00672"></a>00672 {
<a name="l00673"></a>00673 <a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx;
<a name="l00674"></a>00674
<a name="l00675"></a>00675 mtx = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*mtx));
<a name="l00676"></a>00676 <span class="keywordflow">if</span> (pthread_mutex_init(&mtx->mtx, NULL) != 0) {
<a name="l00677"></a>00677 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(mtx);
<a name="l00678"></a>00678 <span class="keywordflow">return</span> NULL;
<a name="l00679"></a>00679 }
<a name="l00680"></a>00680 <span class="keywordflow">return</span> mtx;
<a name="l00681"></a>00681 }
<a name="l00682"></a>00682
<a name="l00683"></a>00683 <span class="keywordtype">int</span>
<a name="l00684"></a><a class="code" href="sbthread_8c.html#aaca10c92363d8979100c8fddeb783f9a">00684</a> <a class="code" href="sbthread_8h.html#a3b86c81160360234944737b4eab73125" title="Try to acquire a mutex.">sbmtx_trylock</a>(<a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx)
<a name="l00685"></a>00685 {
<a name="l00686"></a>00686 <span class="keywordflow">return</span> pthread_mutex_trylock(&mtx->mtx);
<a name="l00687"></a>00687 }
<a name="l00688"></a>00688
<a name="l00689"></a>00689 <span class="keywordtype">int</span>
<a name="l00690"></a><a class="code" href="sbthread_8c.html#a000d9d0610c6b91649edde95e3bafa6c">00690</a> <a class="code" href="sbthread_8h.html#a6615e839f7c8ef3ebb6b288525f002cd" title="Acquire a mutex.">sbmtx_lock</a>(<a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx)
<a name="l00691"></a>00691 {
<a name="l00692"></a>00692 <span class="keywordflow">return</span> pthread_mutex_lock(&mtx->mtx);
<a name="l00693"></a>00693 }
<a name="l00694"></a>00694
<a name="l00695"></a>00695 <span class="keywordtype">int</span>
<a name="l00696"></a><a class="code" href="sbthread_8c.html#ab3fdc55976e2b0581e598bd20187ce3a">00696</a> <a class="code" href="sbthread_8h.html#af65691258c916c68f1b5d000aaea233f" title="Release a mutex.">sbmtx_unlock</a>(<a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx)
<a name="l00697"></a>00697 {
<a name="l00698"></a>00698 <span class="keywordflow">return</span> pthread_mutex_unlock(&mtx->mtx);
<a name="l00699"></a>00699 }
<a name="l00700"></a>00700
<a name="l00701"></a>00701 <span class="keywordtype">void</span>
<a name="l00702"></a><a class="code" href="sbthread_8c.html#af1f9eb876ca9fc93d6c548120af14197">00702</a> <a class="code" href="sbthread_8h.html#aa17a6a93744eb813ca80bf098c69bdba" title="Dispose of a mutex.">sbmtx_free</a>(<a class="code" href="structsbmtx__s.html">sbmtx_t</a> *mtx)
<a name="l00703"></a>00703 {
<a name="l00704"></a>00704 pthread_mutex_destroy(&mtx->mtx);
<a name="l00705"></a>00705 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(mtx);
<a name="l00706"></a>00706 }
<a name="l00707"></a>00707 <span class="preprocessor">#endif </span><span class="comment">/* not WIN32 */</span>
<a name="l00708"></a>00708
<a name="l00709"></a>00709 <a class="code" href="structcmd__ln__t.html" title="Opaque structure used to hold the results of command-line parsing.">cmd_ln_t</a> *
<a name="l00710"></a><a class="code" href="sbthread_8c.html#a95c25385f31541c412a458deb9ee94e5">00710</a> <a class="code" href="sbthread_8h.html#ab03c2f299f3e94b9f53aac1c1eaa0695" title="Get configuration object from a thread.">sbthread_config</a>(<a class="code" href="structsbthread__s.html">sbthread_t</a> *th)
<a name="l00711"></a>00711 {
<a name="l00712"></a>00712 <span class="keywordflow">return</span> th->config;
<a name="l00713"></a>00713 }
<a name="l00714"></a>00714
<a name="l00715"></a>00715 <span class="keywordtype">void</span> *
<a name="l00716"></a><a class="code" href="sbthread_8c.html#a94e4cf2b756764e453b1469df79b3140">00716</a> <a class="code" href="sbthread_8h.html#a130f2273128498e0f1d875cf6c0c2928" title="Get argument pointer from a thread.">sbthread_arg</a>(<a class="code" href="structsbthread__s.html">sbthread_t</a> *th)
<a name="l00717"></a>00717 {
<a name="l00718"></a>00718 <span class="keywordflow">return</span> th->arg;
<a name="l00719"></a>00719 }
<a name="l00720"></a>00720
<a name="l00721"></a>00721 <a class="code" href="structsbmsgq__s.html">sbmsgq_t</a> *
<a name="l00722"></a><a class="code" href="sbthread_8c.html#af13e76cf03ad458f48f9604ec4731bdc">00722</a> <a class="code" href="sbthread_8h.html#a5dfe1b7bb9c8d9aea7339e99a89307af" title="Get message queue from a thread.">sbthread_msgq</a>(<a class="code" href="structsbthread__s.html">sbthread_t</a> *th)
<a name="l00723"></a>00723 {
<a name="l00724"></a>00724 <span class="keywordflow">return</span> th->msgq;
<a name="l00725"></a>00725 }
<a name="l00726"></a>00726
<a name="l00727"></a>00727 <span class="keywordtype">int</span>
<a name="l00728"></a><a class="code" href="sbthread_8c.html#afae533b302b310a828cf2eed1f2f5995">00728</a> <a class="code" href="sbthread_8h.html#a932830409403ab4a03f0ffefe907551e" title="Send an asynchronous message to a thread.">sbthread_send</a>(<a class="code" href="structsbthread__s.html">sbthread_t</a> *th, <span class="keywordtype">size_t</span> len, <span class="keywordtype">void</span> <span class="keyword">const</span> *data)
<a name="l00729"></a>00729 {
<a name="l00730"></a>00730 <span class="keywordflow">return</span> <a class="code" href="sbthread_8h.html#ab0591b5cb626be52dd22edf8fa13a3e3" title="Post a message to a queue.">sbmsgq_send</a>(th->msgq, len, data);
<a name="l00731"></a>00731 }
<a name="l00732"></a>00732
<a name="l00733"></a>00733 <span class="keywordtype">void</span>
<a name="l00734"></a><a class="code" href="sbthread_8c.html#a2b80d955dab72ff602d9048551dc7489">00734</a> <a class="code" href="sbthread_8h.html#aa7827b760dfa47d95141f4896698e5c5" title="Free a thread object.">sbthread_free</a>(<a class="code" href="structsbthread__s.html">sbthread_t</a> *th)
<a name="l00735"></a>00735 {
<a name="l00736"></a>00736 <a class="code" href="sbthread_8h.html#a09c5c428b02b743c99d20bb2b11d964b" title="Wait for a thread to complete.">sbthread_wait</a>(th);
<a name="l00737"></a>00737 <a class="code" href="sbthread_8h.html#ab1ab59934422a5fac90ce0c4b66ffcc8" title="Free a message queue.">sbmsgq_free</a>(th->msgq);
<a name="l00738"></a>00738 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(th);
<a name="l00739"></a>00739 }
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