int
main(int argc, char **argv)
{
int i, nloop;
mqd_t mq1, mq2;
char buff[MSGSIZE];
pid_t childpid;
struct mq_attr attr;
if (argc != 2)
err_quit("usage: lat_pxmsg <#loops>");
nloop = atoi(argv[1]);
attr.mq_maxmsg = MAXMSG;
attr.mq_msgsize = MSGSIZE;
mq1 = Mq_open(Px_ipc_name(NAME1), O_RDWR | O_CREAT, FILE_MODE, &attr);
mq2 = Mq_open(Px_ipc_name(NAME2), O_RDWR | O_CREAT, FILE_MODE, &attr);
if ( (childpid = Fork()) == 0) {
for ( ; ; ) { /* child */
if (Mq_receive(mq1, buff, MSGSIZE, NULL) != 1)
err_quit("mq_receive error");
Mq_send(mq2, buff, 1, 0);
}
exit(0);
}
/* 4parent */
doit(mq1, mq2);
Start_time();
for (i = 0; i < nloop; i++)
doit(mq1, mq2);
printf("latency: %.3f usec\n", Stop_time() / nloop);
Kill(childpid, SIGTERM);
Mq_close(mq1);
Mq_close(mq2);
Mq_unlink(Px_ipc_name(NAME1));
Mq_unlink(Px_ipc_name(NAME2));
exit(0);
}
/*
* =====================================================================
* Function:MsgQDelete()
* Description: delete a message queue
* Input: mqname -- name of new message queue, just for Linux
* In Linux, the queue is identified by name.
* msgQId -- msgQ id
* Output: N/A
* Return: OK on success or ERROR otherwise.
*======================================================================
*/
int MsgQDelete(const char* mqname, MSG_QUEUE_ID msgQId)
{
#ifdef LINUX_OS
if (mqname == AII_NULL || msgQId == AII_NULL)
{
return (-1);
}
free(msgQId);
msgQId = AII_NULL;
return Mq_unlink(mqname);
#elif VXWORKS_OS
if (msgQId == AII_NULL)
{
return (-1);
}
return msgQDelete(msgQId);
#endif
}
