[ECOS] RE: POSIX Queues
Ali, Khurram
Khurram_Ali@mentor.com
Wed Apr 27 18:26:00 GMT 2005
As a follow up to this...I get linker error (undefined) when I use
mq_notify. I have all the other queue APIs available.
I would really appreciate any help.
Thank you,
Khurram
-----Original Message-----
From: Ali, Khurram
Sent: Wednesday, April 27, 2005 11:11 AM
To: 'eCos Discussion'
Subject: POSIX Queues
Hi,
I am running the following application on an x86 platform:
mqd_t Queue;
int main (void)
{
char send[100];
char recv[128];
int priority;
struct mq_attr mqstat;
int status;
struct timespec interval;
/* Create queue. */
mqstat.mq_flags = 0;
mqstat.mq_maxmsg = 1;
mqstat.mq_msgsize = 100;
Queue = mq_open("Queue",
(O_RDWR | O_CREAT),
0,
mqstat);
if (Queue < 0)
{
printf ("Can not create Queue.\r\n");
}
interval.tv_sec = 10;
interval.tv_nsec= 0;
while(1)
{
/* Send to queue. */
status = mq_timedsend(Queue,
send,
100,
16,
&interval);
if (status != 0)
{
printf("Can not send to queue. %i \r\n", status);
}
else
{
printf("\t Sent %i \r\n", status);
}
/* Receive from queue. */
status = mq_timedreceive(Queue,
recv,
128,
&priority,
&interval);
if (status < 0)
{
printf("Can not receive from queue. %i \r\n", status);
}
else
{
printf("\t Received %i \r\n", status);
}
}
}
After sometime, I am unable to send or receive from queue. Does anyone
have any idea what could be wrong?
Thank you,
Khurram
---------------------------------------
M. Khurram Ali - khurram_ali@mentor.com
Software Engineer
Accelerated Technology,
A Mentor Graphics Division
739 North University Blvd.
Mobile, AL 36608
www.mentor.com/embedded
---------------------------------------
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