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2001-01-12 Joel Sherrill <joel@OARcorp.com>

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* src/README.mqueue: Enhanced example.
This commit is contained in:
Joel Sherrill
2001-01-12 13:34:24 +00:00
parent 4d6b3b66e1
commit d9f61654c7
4 changed files with 32 additions and 2 deletions
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4
c/src/exec/posix/ChangeLog
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@@ -1,3 +1,7 @@
2001-01-12 Joel Sherrill <joel@OARcorp.com>
* src/README.mqueue: Enhanced example.
2000-12-19 Joel Sherrill <joel@OARcorp.com>
* src/pthreadgetschedparam.c: Do not set output parameters if

13
c/src/exec/posix/src/README.mqueue
View File

@@ -6,6 +6,7 @@ This program should print out the default attribute settings for a
POSIX message queue.
#include <mqueue.h>
#include <stdio.h>
main()
{
@@ -13,15 +14,25 @@ main()
struct mq_attr mqstat;
int status;
/* this should create it */
mqfd = mq_open("myipc",O_WRONLY|O_CREAT,NULL);
if ( (int)mqfd == -1 ) {
perror( "Unable to open message queue" );
exit( 1 );
}
status = mq_getattr(mqfd, &mqstat);
printf( "status: %d\n", status );
if ( !status ) {
printf( "mq_maxmsg: %d\n", mqstat.mq_maxmsg );
printf( "mq_msgsize: %d\n", mqstat.mq_msgsize );
printf( "mq_curmsgs: %d\n", mqstat.mq_curmsgs );
} else {
perror( "Unable to get attributes on message queue" );
exit( 1 );
}
/* this should delete it */
(void) mq_close( mqfd );
exit( 0 );
}