NAME

pthread_attr_setschedpolicy, pthread_attr_getschedpolicy - set/get scheduling policy attribute in thread attributes object

SYNOPSIS

#include <pthread.h>
int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);
int pthread_attr_getschedpolicy(pthread_attr_t *attr, int *policy);

Compile and link with -pthread.

DESCRIPTION

The pthread_attr_setschedpolicy() function sets the scheduling policy attribute of the thread attributes object referred to by thread to the value specified in policy. This attribute determines the scheduling policy of a thread created using the thread attributes object attr.

The supported values for policy are SCHED_FIFO, SCHED_RR, and SCHED_OTHER, with the semantics described in sched_setscheduler(2).

The pthread_attr_getschedpolicy() returns the scheduling policy attribute of the thread attributes object attr in the buffer pointed to by policy.

RETURN VALUE

On success, these functions return 0; on error, they return a non-zero error number.

ERRORS

pthread_attr_setschedpolicy() can fail with the following error:

EINVAL

Invalid value in policy.

POSIX.1-2001 also documents an optional ENOTSUP error ("attempt was made to set the attribute to an unsupported value") for pthread_attr_setschedpolicy().

CONFORMING TO

POSIX.1-2001.

EXAMPLE

See pthread_setschedparam(3).

SEE ALSO

sched_setscheduler(2), pthread_attr_init(3), pthread_attr_setinheritsched(3), pthread_attr_setschedparam(3), pthread_create(3), pthread_setschedparam(3), pthread_setschedprio(3), pthreads(7)

COLOPHON

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