strange problems with pthreads

From: Chris Friesen (cfriesen_at_ca.nortel.com)
Date: 02/20/04 

Date: Fri, 20 Feb 2004 12:36:57 -0500

I'm running the following code as root, on a uniprocessor system. I get
an error printed out:

error:No such process priority:40 policy:2

Any idea what's going on? Am I doing something invalid?

Chris

#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>

pthread_t t1;

void *func(void *p)
{
   pid_t pid;
   int status;

   struct sched_param schedParam;
   int policy = SCHED_RR;
   int priority = 40;

   schedParam.sched_priority = priority;

  int schedRc = pthread_setschedparam(t1, policy, &schedParam);
   if (schedRc != 0)
     {
       fprintf(stderr, "error:%s priority:%d policy:%d\n",
              strerror(schedRc), priority, policy);
     }

   pthread_exit(EXIT_SUCCESS);
   return 0;
}

int main(int argc, char **argv)
{
   pthread_create(&t1, 0, func,(void*)1);
   pthread_join(t1,0);
   return 0;
} 

-- 
Chris Friesen                    | MailStop: 043/33/F10
Nortel Networks                  | work: (613) 765-0557
3500 Carling Avenue              | fax:  (613) 765-2986
Nepean, ON K2H 8E9 Canada        | email: cfriesen@nortelnetworks.com

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