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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/msgqrecv_8c_source.html
changeset 6 43e37759235e 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/msgqrecv_8c_source.html	Tue Mar 30 16:16:55 2010 +0100
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+<title>TB9.2 Example Applications: examples/PIPS/opencmessagequeuelibraryex/engine/src/msgqrecv.c Source File</title>
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+<h1>examples/PIPS/opencmessagequeuelibraryex/engine/src/msgqrecv.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 
+<a name="l00010"></a>00010 <span class="preprocessor">#include &lt;errno.h&gt;</span>
+<a name="l00011"></a>00011 <span class="preprocessor">#include &lt;sys/msg.h&gt;</span>
+<a name="l00012"></a>00012 <span class="preprocessor">#include &lt;sys/sem.h&gt;</span>
+<a name="l00013"></a>00013 <span class="preprocessor">#include &lt;unistd.h&gt;</span>
+<a name="l00014"></a>00014 <span class="preprocessor">#include &lt;string.h&gt;</span>
+<a name="l00015"></a>00015 <span class="preprocessor">#include &quot;<a class="code" href="msgqinternal_8h.html">MsgQInternal.h</a>&quot;</span>
+<a name="l00016"></a>00016 
+<a name="l00017"></a>00017 
+<a name="l00018"></a>00018 
+<a name="l00019"></a>00019 <span class="comment">/*******************************************************************************</span>
+<a name="l00020"></a>00020 <span class="comment">* MsgQReceive (qName, msg, maxNBytes, timeout, err)</span>
+<a name="l00021"></a>00021 <span class="comment">* Description: Function for receiving a message with internal copy</span>
+<a name="l00022"></a>00022 <span class="comment">********************************************************************************/</span>
+<a name="l00023"></a>00023 
+<a name="l00024"></a><a class="code" href="msgqlib_8h.html#a92645de66865355158589ff1dd7bc28d">00024</a> EXPORT_C <span class="keywordtype">int</span> <a class="code" href="msgqlib_8h.html#a92645de66865355158589ff1dd7bc28d">MsgQReceive</a>(ULONG qName, <span class="keywordtype">char</span>* msg, ULONG maxNBytes, <span class="keywordtype">int</span> timeout, <span class="keywordtype">int</span>* err) {
+<a name="l00025"></a>00025         <a class="code" href="struct_msg_q_info.html">MSGQ_INFO</a>* pMsgQInfo = NULL;
+<a name="l00026"></a>00026         ssize_t rxBytes;
+<a name="l00027"></a>00027         <span class="keywordtype">int</span> toTicks;
+<a name="l00028"></a>00028 
+<a name="l00029"></a>00029         <span class="keyword">struct </span>{
+<a name="l00030"></a>00030                 <span class="keywordtype">long</span>  mtype;
+<a name="l00031"></a>00031                 <span class="keywordtype">char</span> mtext[MAX_MSG_LEN];
+<a name="l00032"></a>00032         } message;
+<a name="l00033"></a>00033 
+<a name="l00034"></a>00034         <span class="comment">/* check parameters */</span>
+<a name="l00035"></a>00035         <span class="keywordflow">if</span> ((pMsgQInfo = MsgQTableLookup(qName)) != NULL) {
+<a name="l00036"></a>00036                 <span class="keywordflow">if</span>(timeout != NO_WAIT &amp;&amp; timeout != WAIT_FOREVER)
+<a name="l00037"></a>00037                         toTicks = timeout &lt; 10 ? 1: (ULONG)((timeout * sysconf(_SC_CLK_TCK)) / 1000);
+<a name="l00038"></a>00038                 <span class="keywordflow">else</span>
+<a name="l00039"></a>00039                         toTicks = timeout;      
+<a name="l00040"></a>00040 
+<a name="l00041"></a>00041                 message.mtype = 1;
+<a name="l00042"></a>00042                 <span class="comment">/* receive message */</span>
+<a name="l00043"></a>00043                 <span class="keywordflow">if</span>((rxBytes = msgrcv(pMsgQInfo-&gt;qId, &amp;message, (<span class="keywordtype">size_t</span>)maxNBytes, 1, toTicks)) != -1) {
+<a name="l00044"></a>00044                         message.mtext[rxBytes-4] = <span class="charliteral">&#39;\0&#39;</span>;
+<a name="l00045"></a>00045                         bcopy(message.mtext, msg, rxBytes);
+<a name="l00046"></a>00046                         pMsgQInfo-&gt;numMsgs--;
+<a name="l00047"></a>00047                         *err = OK;
+<a name="l00048"></a>00048                         <span class="keywordflow">return</span> ((ULONG)rxBytes);
+<a name="l00049"></a>00049                 }
+<a name="l00050"></a>00050                 <span class="keywordflow">else</span>
+<a name="l00051"></a>00051                         *err = errno;
+<a name="l00052"></a>00052         }
+<a name="l00053"></a>00053         <span class="keywordflow">else</span>
+<a name="l00054"></a>00054                 *err = KMsgQLibQIdErr;
+<a name="l00055"></a>00055 
+<a name="l00056"></a>00056         <span class="keywordflow">return</span>(ERROR);
+<a name="l00057"></a>00057 }
+<a name="l00058"></a>00058 
+<a name="l00059"></a>00059 
+</pre></div></div>
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+<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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