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PTHREAD_SETSCHEDPARAM(3) Library Functions Manual PTHREAD_SETSCHEDPARAM(3)

pthread_setschedparam, pthread_getschedparamthread scheduling parameter manipulation

#include <pthread.h>

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

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

The () and () 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) or SCHED_RR (round-robin). The thread priority (accessed via param->sched_priority) must be within the range returned by the () and () functions.

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

pthread_setschedparam() will fail if:

[]
Invalid value for policy.
[]
Invalid value for scheduling parameters.
[]
Non-existent thread thread.

pthread_getschedparam() will fail if:

[]
Non-existent thread thread.

sched_get_priority_max(3)

pthread_setschedparam() and pthread_getschedparam() conform to Version 2 of the Single UNIX Specification (“SUSv2”)

November 10, 2015 OpenBSD-7.4