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1 /** |
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2 * @file MsgQCreate.cpp |
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3 * Description: Source file for MsgQLib's MsgQCreate API |
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4 * Copyright (c) 2007 Nokia Corporation. |
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5 * All rights reserved. |
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6 * Redistribution and use in source and binary forms, with or without modification, |
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7 * are permitted provided that the following conditions are met: |
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8 * Redistributions of source code must retain the above copyright notice, this list |
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9 * of conditions and the following disclaimer.Redistributions in binary form must |
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10 * reproduce the above copyright notice, this list of conditions and the following |
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11 * disclaimer in the documentation and/or other materials provided with the distribution. |
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12 * Neither the name of the Nokia Corporation nor the names of its contributors may be used |
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13 * to endorse or promote products derived from this software without specific prior written |
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14 * permission. |
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15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY |
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16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
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18 * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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20 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
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23 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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24 */ |
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25 |
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26 #include <errno.h> |
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27 #include <sys/msg.h> |
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28 #include <sys/sem.h> |
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29 #include <msgqinternal.h> |
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30 #include <msgliterals.h> |
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31 |
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32 |
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33 /******************************************************************************** |
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34 * MsgQCreate |
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35 * Description: Creates a message queue |
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36 * Inputs: |
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37 * qName : ULONG that represents the queue name |
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38 * maxMsgs : ULONG that represents maximum size of messages |
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39 *********************************************************************************/ |
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40 EXPORT_C int MsgQCreate(ULONG qName, ULONG maxMsgs, ULONG qOptions, int* err) { |
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41 |
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42 |
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43 UNUSED_FORMAL_PARAM(qName); |
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44 UNUSED_FORMAL_PARAM(maxMsgs); |
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45 UNUSED_FORMAL_PARAM(err); |
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46 if((qOptions == MSG_Q_FIFO) || (qOptions == MSG_Q_PRIORITY)) { |
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47 // Set msg queue options to FIFO and create the message queue |
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48 qOptions= MSG_Q_FIFO ; |
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49 |
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50 if((msgget((key_t) qName ,IPC_CREAT | 0666 | IPC_EXCL )) == -1 ) { |
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51 if ( errno == 17 ){ |
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52 // message queue already exists |
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53 // now just get the hanlde to it |
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54 // no need to leave over here; |
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55 } |
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56 } |
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57 |
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58 if((msgget((key_t) qName ,IPC_CREAT | 0666 )) >=0 ) { |
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59 |
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60 // set msg queue parameter max # bytes in queue |
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61 |
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62 /* if( msgctl(qId,IPC_STAT,&qStatus) == 0 ) |
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63 |
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64 if( qStatus.msg_qbytes > (maxMsgs * MAX_MSG_LEN) ) { |
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65 qStatus.msg_qbytes = maxMsgs * MAX_MSG_LEN ; |
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66 if( msgctl(qId,IPC_SET,&qStatus) < 0) { |
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67 // delete message queue on error |
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68 msgctl(qId,IPC_RMID,0); |
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69 *err = errno; |
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70 return(ERROR); |
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71 } |
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72 } |
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73 |
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74 */ |
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75 |
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76 *err = OK; |
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77 return (OK); |
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78 |
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79 |
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80 } |
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81 else { |
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82 *err = errno; |
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83 } |
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84 } |
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85 else { |
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86 *err = KMsgQLibParamErr; |
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87 } |
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88 |
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89 return(ERROR); |
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90 } |
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91 |