NAME

pthread_setschedparam, pthread_getschedparam - thread scheduling parameter manipulation

LIBRARY

POSIX Thread Library (libpthread, -lpthread)

SYNOPSIS



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 ISO/IEC 9945-1:1996 (``POSIX.1'') .