PTHREAD_SCHEDPARAM(3) | FreeBSD Library Functions Manual | PTHREAD_SCHEDPARAM(3) |
NAME
pthread_setschedparam, pthread_getschedparam — thread scheduling parameter manipulationLIBRARY
POSIX Threads Library (libpthread, -lpthread)SYNOPSIS
#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);
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 (timesharing). Valid thread priorities (accessed via param->sched_priority) must be within the range returned by the sched_get_priority_min(2) and sched_get_priority_max(2) system calls.RETURN VALUES
If successful, these functions return 0. Otherwise, an error number is returned to indicate the error.ERRORS
The pthread_setschedparam() function will fail if:- [ EINVAL]
- Invalid value for policy.
- [ ENOTSUP]
- Invalid value for scheduling parameters.
- [ ESRCH]
- Non-existent thread thread.
The pthread_getschedparam() function will fail if:
- [ ESRCH]
- Non-existent thread thread.
STANDARDS
The pthread_setschedparam() and pthread_getschedparam() functions conform to Version 2 of the Single UNIX Specification (“SUSv2”).October 16, 2006 | FreeBSD |