Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/msgqsend_8c_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>TB9.2 Example Applications: examples/PIPS/opencmessagequeuelibraryex/engine/src/msgqsend.c Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.6.2 -->
<h1>examples/PIPS/opencmessagequeuelibraryex/engine/src/msgqsend.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00010"></a>00010 <span class="preprocessor">#include <errno.h></span>
<a name="l00011"></a>00011 <span class="preprocessor">#include <sys/msg.h></span>
<a name="l00012"></a>00012 <span class="preprocessor">#include <sys/sem.h></span>
<a name="l00013"></a>00013 <span class="preprocessor">#include <string.h></span>
<a name="l00014"></a>00014 <span class="preprocessor">#include "<a class="code" href="msgqinternal_8h.html">MsgQInternal.h</a>"</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="comment">/*******************************************************************************</span>
<a name="l00018"></a>00018 <span class="comment">* MsgQSend (qName, msg, nBytes, priority, timeout, err)</span>
<a name="l00019"></a>00019 <span class="comment">* Description: Function for sending a message with internal copy</span>
<a name="l00020"></a>00020 <span class="comment">*********************************************************************************/</span>
<a name="l00021"></a>00021
<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)
<a name="l00023"></a>00023 {
<a name="l00024"></a>00024 <a class="code" href="struct_msg_q_info.html">MSGQ_INFO</a>* pMsgQInfo = NULL;
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="keyword">struct </span>{
<a name="l00027"></a>00027 <span class="keywordtype">long</span> mtype;
<a name="l00028"></a>00028 <span class="keywordtype">char</span> mtext[MAX_MSG_LEN];
<a name="l00029"></a>00029 } message;
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="comment">/* structure used for semaphore post operation */</span>
<a name="l00032"></a>00032 <span class="keyword">struct </span>sembuf op;
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="comment">/* init the semop () structure which is used for wait and signal operations */</span>
<a name="l00035"></a>00035 op.sem_num = 0;
<a name="l00036"></a>00036 op.sem_op = -1;
<a name="l00037"></a>00037 op.sem_flg = SEM_UNDO;
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="comment">/* check parameters */</span>
<a name="l00040"></a>00040 <span class="keywordflow">if</span> ((priority == MSG_PRI_NORMAL) || (priority == MSG_PRI_URGENT)) {
<a name="l00041"></a>00041 <span class="keywordflow">if</span>((pMsgQInfo = MsgQTableLookup(qName)) != NULL) {
<a name="l00042"></a>00042 <span class="keywordflow">if</span> (pMsgQInfo->sendState == MSG_Q_READY) {
<a name="l00043"></a>00043 op.sem_flg = op.sem_flg | timeout;
<a name="l00044"></a>00044 <span class="keywordflow">if</span>((semop(pMsgQInfo->semId, &op, 1)) == OK) {
<a name="l00045"></a>00045 pMsgQInfo->numMsgs++;
<a name="l00046"></a>00046 <span class="keywordflow">if</span>(pMsgQInfo->maxNumMsgs < pMsgQInfo->numMsgs)
<a name="l00047"></a>00047 pMsgQInfo->maxNumMsgs = pMsgQInfo->numMsgs;
<a name="l00048"></a>00048
<a name="l00049"></a>00049 message.mtype = 1;
<a name="l00050"></a>00050 bcopy(msg, message.mtext, nBytes);
<a name="l00051"></a>00051 message.mtext[nBytes] = <span class="charliteral">'\0'</span>;
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="keywordflow">if</span>(msgsnd (pMsgQInfo->qId, &message, (<span class="keywordtype">size_t</span>)nBytes+4, timeout) == OK) {
<a name="l00054"></a>00054 *err = OK;
<a name="l00055"></a>00055 <span class="comment">/* After successfull send, unlock the message queue by using post operation on semaphore.*/</span>
<a name="l00056"></a>00056 op.sem_op = 1;
<a name="l00057"></a>00057 semop(pMsgQInfo->semId, &op, 1);
<a name="l00058"></a>00058 <span class="keywordflow">return</span> (OK);
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060 <span class="keywordflow">else</span> {
<a name="l00061"></a>00061 *err = errno;
<a name="l00062"></a>00062 pMsgQInfo->numMsgs--;
<a name="l00063"></a>00063 op.sem_op = 1;
<a name="l00064"></a>00064 semop(pMsgQInfo->semId, &op, 1);
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067 <span class="keywordflow">else</span>
<a name="l00068"></a>00068 *err = errno;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070 <span class="keywordflow">else</span>
<a name="l00071"></a>00071 *err = KMsgQLibQFlushErr;
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073 <span class="keywordflow">else</span>
<a name="l00074"></a>00074 *err = KMsgQLibQIdErr;
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076 <span class="keywordflow">else</span>
<a name="l00077"></a>00077 *err = KMsgQLibParamErr;
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <span class="keywordflow">return</span>(ERROR);
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081
<a name="l00082"></a>00082
</pre></div></div>
<hr size="1"/><address style="text-align: right;"><small>Generated by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
</body>
</html>