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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/msgqcheck_8c_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Tue, 20 Jul 2010 12:00:49 +0100
changeset 13 48780e181b38
parent 6 43e37759235e
permissions -rw-r--r--
Week 28 contribution of SDK documentation content. See release notes for details. Fixes bugs Bug 1897 and Bug 1522.
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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/msgqcheck.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/msgqcheck.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 &quot;<a class="code" href="msgqinternal_8h.html">MsgQInternal.h</a>&quot;</span>
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<a name="l00013"></a>00013
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<a name="l00014"></a>00014
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<a name="l00015"></a>00015
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<a name="l00016"></a>00016 <span class="comment">/*****************************************************************************</span>
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<a name="l00017"></a>00017 <span class="comment">*  MsgQCheck</span>
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<a name="l00018"></a>00018 <span class="comment">*  Function: Function for checking how many messages are in a queue</span>
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<a name="l00019"></a>00019 <span class="comment">*******************************************************************************/</span>
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<a name="l00020"></a>00020
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<a name="l00021"></a><a class="code" href="msgqlib_8h.html#a6539cca974e31b9571caae1a93576b21">00021</a> EXPORT_C <span class="keywordtype">int</span> <a class="code" href="msgqlib_8h.html#a6539cca974e31b9571caae1a93576b21">MsgQCheck</a>(ULONG qName, <span class="keywordtype">int</span>* err) {
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<a name="l00022"></a>00022         <a class="code" href="struct_msg_q_info.html">MSGQ_INFO</a>* pMsgQInfo = NULL;
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<a name="l00023"></a>00023         <span class="keywordtype">int</span> nMsgs;
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<a name="l00024"></a>00024         <span class="keyword">struct  </span>msqid_ds  qStatus ;
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026         <span class="keywordflow">if</span> ((pMsgQInfo = MsgQTableLookup(qName)) != NULL) {
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<a name="l00027"></a>00027                 <span class="comment">//   get total count of msgs from the msg queue </span>
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<a name="l00028"></a>00028                 <span class="keywordflow">if</span> ((msgctl(pMsgQInfo-&gt;qId,IPC_STAT ,&amp;qStatus)) &gt;= 0 ) {
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<a name="l00029"></a>00029                         nMsgs=qStatus.msg_qnum ;
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<a name="l00030"></a>00030                         <span class="keywordflow">if</span> (nMsgs == pMsgQInfo-&gt;numMsgs) {
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<a name="l00031"></a>00031                                 *err = OK;
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<a name="l00032"></a>00032                                 <span class="keywordflow">return</span>(nMsgs);
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<a name="l00033"></a>00033                         }
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<a name="l00034"></a>00034                         <span class="keywordflow">else</span> {
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<a name="l00035"></a>00035                                 *err = KMsgQLibQShortErr;
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<a name="l00036"></a>00036                                 <span class="keywordflow">return</span>(pMsgQInfo-&gt;numMsgs);
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<a name="l00037"></a>00037                         }
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<a name="l00038"></a>00038                 }
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<a name="l00039"></a>00039                 <span class="keywordflow">else</span>
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<a name="l00040"></a>00040                         *err=errno;
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<a name="l00041"></a>00041         }
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<a name="l00042"></a>00042         <span class="keywordflow">else</span>
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<a name="l00043"></a>00043                 *err = KMsgQLibQIdErr;
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<a name="l00044"></a>00044         <span class="keywordflow">return</span>(ERROR);
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<a name="l00045"></a>00045 }
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<a name="l00046"></a>00046
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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>
FCL/sftools/depl/docscontent