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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/msgqsend_8c_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 11 Jun 2010 15:24:34 +0100
changeset 9 59758314f811
parent 6 43e37759235e
permissions -rw-r--r--
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/PIPS/opencmessagequeuelibraryex/engine/src/msgqsend.c Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/PIPS/opencmessagequeuelibraryex/engine/src/msgqsend.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
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<a name="l00010"></a>00010 <span class="preprocessor">#include &lt;errno.h&gt;</span>
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<a name="l00011"></a>00011 <span class="preprocessor">#include &lt;sys/msg.h&gt;</span>
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<a name="l00012"></a>00012 <span class="preprocessor">#include &lt;sys/sem.h&gt;</span>
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<a name="l00013"></a>00013 <span class="preprocessor">#include &lt;string.h&gt;</span>
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<a name="l00014"></a>00014 <span class="preprocessor">#include &quot;<a class="code" href="msgqinternal_8h.html">MsgQInternal.h</a>&quot;</span>
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<a name="l00015"></a>00015
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<a name="l00016"></a>00016
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<a name="l00017"></a>00017 <span class="comment">/*******************************************************************************</span>
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<a name="l00018"></a>00018 <span class="comment">* MsgQSend (qName, msg, nBytes, priority, timeout, err)</span>
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<a name="l00019"></a>00019 <span class="comment">* Description:  Function for sending a message with internal copy</span>
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<a name="l00020"></a>00020 <span class="comment">*********************************************************************************/</span>
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<a name="l00021"></a>00021
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<a name="l00022"></a><a class="code" href="msgqlib_8h.html#a5272782967b922604e4f47e8bc67a468">00022</a> EXPORT_C <span class="keywordtype">int</span> <a class="code" href="msgqlib_8h.html#a5272782967b922604e4f47e8bc67a468">MsgQSend</a>(ULONG qName, <span class="keywordtype">char</span>* msg, ULONG nBytes, ULONG priority, <span class="keywordtype">int</span> timeout, <span class="keywordtype">int</span>* err)
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<a name="l00023"></a>00023 {
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<a name="l00024"></a>00024         <a class="code" href="struct_msg_q_info.html">MSGQ_INFO</a>* pMsgQInfo = NULL;
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026         <span class="keyword">struct </span>{
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<a name="l00027"></a>00027                 <span class="keywordtype">long</span> mtype;
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<a name="l00028"></a>00028                 <span class="keywordtype">char</span> mtext[MAX_MSG_LEN];
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<a name="l00029"></a>00029         } message;
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<a name="l00030"></a>00030
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<a name="l00031"></a>00031         <span class="comment">/* structure used for semaphore post operation */</span>
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<a name="l00032"></a>00032         <span class="keyword">struct </span>sembuf op;
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<a name="l00033"></a>00033
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<a name="l00034"></a>00034         <span class="comment">/* init the  semop () structure which is used for wait and signal operations */</span>
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<a name="l00035"></a>00035         op.sem_num = 0;
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<a name="l00036"></a>00036         op.sem_op = -1;
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<a name="l00037"></a>00037         op.sem_flg = SEM_UNDO;
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<a name="l00038"></a>00038
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<a name="l00039"></a>00039         <span class="comment">/* check parameters */</span>
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<a name="l00040"></a>00040         <span class="keywordflow">if</span> ((priority == MSG_PRI_NORMAL) || (priority == MSG_PRI_URGENT)) {
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<a name="l00041"></a>00041                 <span class="keywordflow">if</span>((pMsgQInfo = MsgQTableLookup(qName)) != NULL) {
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<a name="l00042"></a>00042                         <span class="keywordflow">if</span> (pMsgQInfo-&gt;sendState == MSG_Q_READY) {
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<a name="l00043"></a>00043                                 op.sem_flg = op.sem_flg | timeout;
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<a name="l00044"></a>00044                                 <span class="keywordflow">if</span>((semop(pMsgQInfo-&gt;semId, &amp;op, 1)) == OK) {
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<a name="l00045"></a>00045                                         pMsgQInfo-&gt;numMsgs++;
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<a name="l00046"></a>00046                                         <span class="keywordflow">if</span>(pMsgQInfo-&gt;maxNumMsgs &lt; pMsgQInfo-&gt;numMsgs)
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<a name="l00047"></a>00047                                         pMsgQInfo-&gt;maxNumMsgs = pMsgQInfo-&gt;numMsgs;
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<a name="l00048"></a>00048
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<a name="l00049"></a>00049                                         message.mtype = 1;
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<a name="l00050"></a>00050                                         bcopy(msg, message.mtext, nBytes);
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<a name="l00051"></a>00051                                         message.mtext[nBytes] = <span class="charliteral">&#39;\0&#39;</span>;
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<a name="l00052"></a>00052
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<a name="l00053"></a>00053                                         <span class="keywordflow">if</span>(msgsnd (pMsgQInfo-&gt;qId, &amp;message, (<span class="keywordtype">size_t</span>)nBytes+4, timeout) == OK) {
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<a name="l00054"></a>00054                                                 *err = OK;
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<a name="l00055"></a>00055                                                 <span class="comment">/* After successfull send, unlock the message queue by using post operation on semaphore.*/</span>
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<a name="l00056"></a>00056                                                 op.sem_op = 1;
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<a name="l00057"></a>00057                                                 semop(pMsgQInfo-&gt;semId, &amp;op, 1);
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<a name="l00058"></a>00058                                                 <span class="keywordflow">return</span> (OK);
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<a name="l00059"></a>00059                                         }
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<a name="l00060"></a>00060                                         <span class="keywordflow">else</span> {
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<a name="l00061"></a>00061                                                 *err = errno;
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<a name="l00062"></a>00062                                                 pMsgQInfo-&gt;numMsgs--;
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<a name="l00063"></a>00063                                                 op.sem_op = 1;
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<a name="l00064"></a>00064                                                 semop(pMsgQInfo-&gt;semId, &amp;op, 1);
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<a name="l00065"></a>00065                                         }
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<a name="l00066"></a>00066                                 }
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<a name="l00067"></a>00067                                 <span class="keywordflow">else</span>
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<a name="l00068"></a>00068                                         *err = errno;
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<a name="l00069"></a>00069                         }
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<a name="l00070"></a>00070                         <span class="keywordflow">else</span>
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<a name="l00071"></a>00071                                 *err = KMsgQLibQFlushErr;
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<a name="l00072"></a>00072                 }
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<a name="l00073"></a>00073                 <span class="keywordflow">else</span>
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<a name="l00074"></a>00074                         *err = KMsgQLibQIdErr;
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<a name="l00075"></a>00075         }
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<a name="l00076"></a>00076         <span class="keywordflow">else</span>
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<a name="l00077"></a>00077                 *err = KMsgQLibParamErr;
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<a name="l00078"></a>00078
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<a name="l00079"></a>00079         <span class="keywordflow">return</span>(ERROR);
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<a name="l00080"></a>00080 }
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<a name="l00081"></a>00081
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<a name="l00082"></a>00082
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</pre></div></div>
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<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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</body>
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</html>
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