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PTHREAD_SCHEDPARAM(3)
Contents
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pthread_setschedparam, pthread_getschedparam -- thread scheduling parameter
manipulation
Reentrant C Library (libc_r, -lc_r)
#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 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.
If successful, these functions return 0. Otherwise, an error number is
returned to indicate the error.
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.
The pthread_setschedparam() and pthread_getschedparam() functions conform
to Version 2 of the Single UNIX Specification (``SUSv2'')
FreeBSD 5.2.1 May 1, 2000 FreeBSD 5.2.1 [ Back ] |