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