pthread_schedparam(3)

NAME

pthread_setschedparam, pthread_getschedparam - thread

scheduling parameter manipulation

LIBRARY

library ``libc_r'' library ``libpthread'' library ``libthr''

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) or
SCHED_RR (round-robin). 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 er

ror 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'')

BSD May 1, 2000

BSD