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5 <title>TB9.2 Example Applications: examples/PIPS/opencmessagequeuelibraryex/engine/src/msgqsend.c Source File</title> |
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10 <!-- Generated by Doxygen 1.6.2 --> |
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11 <h1>examples/PIPS/opencmessagequeuelibraryex/engine/src/msgqsend.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 |
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12 <a name="l00010"></a>00010 <span class="preprocessor">#include <errno.h></span> |
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13 <a name="l00011"></a>00011 <span class="preprocessor">#include <sys/msg.h></span> |
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14 <a name="l00012"></a>00012 <span class="preprocessor">#include <sys/sem.h></span> |
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15 <a name="l00013"></a>00013 <span class="preprocessor">#include <string.h></span> |
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16 <a name="l00014"></a>00014 <span class="preprocessor">#include "<a class="code" href="msgqinternal_8h.html">MsgQInternal.h</a>"</span> |
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17 <a name="l00015"></a>00015 |
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18 <a name="l00016"></a>00016 |
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19 <a name="l00017"></a>00017 <span class="comment">/*******************************************************************************</span> |
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20 <a name="l00018"></a>00018 <span class="comment">* MsgQSend (qName, msg, nBytes, priority, timeout, err)</span> |
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21 <a name="l00019"></a>00019 <span class="comment">* Description: Function for sending a message with internal copy</span> |
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22 <a name="l00020"></a>00020 <span class="comment">*********************************************************************************/</span> |
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23 <a name="l00021"></a>00021 |
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24 <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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25 <a name="l00023"></a>00023 { |
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26 <a name="l00024"></a>00024 <a class="code" href="struct_msg_q_info.html">MSGQ_INFO</a>* pMsgQInfo = NULL; |
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27 <a name="l00025"></a>00025 |
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28 <a name="l00026"></a>00026 <span class="keyword">struct </span>{ |
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29 <a name="l00027"></a>00027 <span class="keywordtype">long</span> mtype; |
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30 <a name="l00028"></a>00028 <span class="keywordtype">char</span> mtext[MAX_MSG_LEN]; |
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31 <a name="l00029"></a>00029 } message; |
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32 <a name="l00030"></a>00030 |
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33 <a name="l00031"></a>00031 <span class="comment">/* structure used for semaphore post operation */</span> |
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34 <a name="l00032"></a>00032 <span class="keyword">struct </span>sembuf op; |
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35 <a name="l00033"></a>00033 |
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36 <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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37 <a name="l00035"></a>00035 op.sem_num = 0; |
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38 <a name="l00036"></a>00036 op.sem_op = -1; |
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39 <a name="l00037"></a>00037 op.sem_flg = SEM_UNDO; |
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40 <a name="l00038"></a>00038 |
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41 <a name="l00039"></a>00039 <span class="comment">/* check parameters */</span> |
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42 <a name="l00040"></a>00040 <span class="keywordflow">if</span> ((priority == MSG_PRI_NORMAL) || (priority == MSG_PRI_URGENT)) { |
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43 <a name="l00041"></a>00041 <span class="keywordflow">if</span>((pMsgQInfo = MsgQTableLookup(qName)) != NULL) { |
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44 <a name="l00042"></a>00042 <span class="keywordflow">if</span> (pMsgQInfo->sendState == MSG_Q_READY) { |
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45 <a name="l00043"></a>00043 op.sem_flg = op.sem_flg | timeout; |
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46 <a name="l00044"></a>00044 <span class="keywordflow">if</span>((semop(pMsgQInfo->semId, &op, 1)) == OK) { |
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47 <a name="l00045"></a>00045 pMsgQInfo->numMsgs++; |
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48 <a name="l00046"></a>00046 <span class="keywordflow">if</span>(pMsgQInfo->maxNumMsgs < pMsgQInfo->numMsgs) |
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49 <a name="l00047"></a>00047 pMsgQInfo->maxNumMsgs = pMsgQInfo->numMsgs; |
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50 <a name="l00048"></a>00048 |
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51 <a name="l00049"></a>00049 message.mtype = 1; |
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52 <a name="l00050"></a>00050 bcopy(msg, message.mtext, nBytes); |
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53 <a name="l00051"></a>00051 message.mtext[nBytes] = <span class="charliteral">'\0'</span>; |
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54 <a name="l00052"></a>00052 |
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55 <a name="l00053"></a>00053 <span class="keywordflow">if</span>(msgsnd (pMsgQInfo->qId, &message, (<span class="keywordtype">size_t</span>)nBytes+4, timeout) == OK) { |
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56 <a name="l00054"></a>00054 *err = OK; |
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57 <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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58 <a name="l00056"></a>00056 op.sem_op = 1; |
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59 <a name="l00057"></a>00057 semop(pMsgQInfo->semId, &op, 1); |
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60 <a name="l00058"></a>00058 <span class="keywordflow">return</span> (OK); |
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61 <a name="l00059"></a>00059 } |
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62 <a name="l00060"></a>00060 <span class="keywordflow">else</span> { |
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63 <a name="l00061"></a>00061 *err = errno; |
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64 <a name="l00062"></a>00062 pMsgQInfo->numMsgs--; |
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65 <a name="l00063"></a>00063 op.sem_op = 1; |
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66 <a name="l00064"></a>00064 semop(pMsgQInfo->semId, &op, 1); |
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67 <a name="l00065"></a>00065 } |
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68 <a name="l00066"></a>00066 } |
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69 <a name="l00067"></a>00067 <span class="keywordflow">else</span> |
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70 <a name="l00068"></a>00068 *err = errno; |
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71 <a name="l00069"></a>00069 } |
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72 <a name="l00070"></a>00070 <span class="keywordflow">else</span> |
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73 <a name="l00071"></a>00071 *err = KMsgQLibQFlushErr; |
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74 <a name="l00072"></a>00072 } |
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75 <a name="l00073"></a>00073 <span class="keywordflow">else</span> |
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76 <a name="l00074"></a>00074 *err = KMsgQLibQIdErr; |
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77 <a name="l00075"></a>00075 } |
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78 <a name="l00076"></a>00076 <span class="keywordflow">else</span> |
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79 <a name="l00077"></a>00077 *err = KMsgQLibParamErr; |
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80 <a name="l00078"></a>00078 |
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81 <a name="l00079"></a>00079 <span class="keywordflow">return</span>(ERROR); |
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82 <a name="l00080"></a>00080 } |
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83 <a name="l00081"></a>00081 |
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84 <a name="l00082"></a>00082 |
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85 </pre></div></div> |
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88 <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address> |
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