redhat man page for pthread_setschedparam

PTHREAD_SETSCHEDPARAM(3)				     Library Functions Manual					  PTHREAD_SETSCHEDPARAM(3)

NAME
       pthread_setschedparam, pthread_getschedparam - control thread scheduling parameters

SYNOPSIS
       #include <pthread.h>

       int pthread_setschedparam(pthread_t target_thread, int policy, const struct sched_param *param);

       int pthread_getschedparam(pthread_t target_thread, int *policy, struct sched_param *param);

DESCRIPTION
       pthread_setschedparam  sets  the scheduling parameters for the thread target_thread as indicated by policy and param.  policy can be either
       SCHED_OTHER (regular, non-realtime scheduling), SCHED_RR (realtime, round-robin) or SCHED_FIFO (realtime, first-in first-out).  param spec-
       ifies the scheduling priority for the two realtime policies.  See sched_setpolicy(2) for more information on scheduling policies.

       The realtime scheduling policies SCHED_RR and SCHED_FIFO are available only to processes with superuser privileges.

       pthread_getschedparam  retrieves  the  scheduling policy and scheduling parameters for the thread target_thread and store them in the loca-
       tions pointed to by policy and param, respectively.

RETURN VALUE
       pthread_setschedparam and pthread_getschedparam return 0 on success and a non-zero error code on error.

ERRORS
       On error, pthread_setschedparam returns the following error codes:

	      EINVAL policy is not one of SCHED_OTHER, SCHED_RR, SCHED_FIFO

	      EINVAL the priority value specified by param is not valid for the specified policy

	      EPERM  the calling process does not have superuser permissions

	      ESRCH  the target_thread is invalid or has already terminated

	      EFAULT param points outside the process memory space

       On error, pthread_getschedparam returns the following error codes:

	      ESRCH  the target_thread is invalid or has already terminated

	      EFAULT policy or param point outside the process memory space

AUTHOR
       Xavier Leroy <Xavier.Leroy@inria.fr>

SEE ALSO
       sched_setscheduler(2), sched_getscheduler(2), sched_getparam(2), pthread_attr_setschedpolicy(3), pthread_attr_setschedparam(3).

								   LinuxThreads 					  PTHREAD_SETSCHEDPARAM(3)