PTHREAD_SCHEDPARAM(3)

NAME
pthread_setschedparam, pthread_getschedparam - thread scheduling parameter manipulation

LIBRARY
libpthread

SYNOPSIS
#include <pthread.h>
int
pthread_setschedparam(pthread_t thread, int policy, const struct sched_param *param);
int
pthread_getschedparam(pthread_t thread, int * restrict policy, struct sched_param * restrict param);

DESCRIPTION
The pthread_setschedparam() and pthread_getschedparam() functions set and get the scheduling parameters of individual threads. The scheduling policy for a thread can either be SCHED_FIFO (first in, first out), SCHED_RR (round-robin), or SCHED_OTHER (system default). The thread priority (accessed via param-sched_priority) must be at least PTHREAD_MIN_PRIORITY and no more than PTHREAD_MAX_PRIORITY.

RETURN VALUES
If successful, these functions return 0. Otherwise, an error number is returned to indicate the error.

ERRORS
pthread_setschedparam() may fail if:

[EINVAL]
    The value specified by policy is invalid.

[ENOTSUP]
    Invalid value for scheduling parameters.

[ESRCH]
    Non-existent thread thread.

pthread_getschedparam() may fail if:

[ESRCH]
    Non-existent thread thread.

STANDARDS
pthread_setschedparam() and pthread_getschedparam() conform to p1003.1-96.