pthread_attr_setschedpolicy - Online Linux Manual PageSection : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03

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NAMEpthread_attr_setschedpolicy, pthread_attr_getschedpolicy − set/get scheduling policy attribute in thread attributes object

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LIBRARYPOSIX threads library (libpthread, −lpthread)

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

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DESCRIPTIONThe pthread_attr_setschedpolicy() function sets the scheduling policy attribute of the thread attributes object referred to by attr 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(7). The pthread_attr_getschedpolicy() returns the scheduling policy attribute of the thread attributes object attr in the buffer pointed to by policy. In order for the policy setting made by pthread_attr_setschedpolicy() to have effect when calling pthread_create(3), the caller must use pthread_attr_setinheritsched(3) to set the inherit-scheduler attribute of the attributes object attr to PTHREAD_EXPLICIT_SCHED.

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RETURN VALUEOn success, these functions return 0; on error, they return a nonzero error number.

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ERRORSpthread_attr_setschedpolicy() can fail with the following error: EINVAL  Invalid value in policy. POSIX.1 also documents an optional ENOTSUP error ("attempt was made to set the attribute to an unsupported value") for pthread_attr_setschedpolicy().

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue pthread_attr_setschedpolicy(), pthread_attr_getschedpolicy() Thread safetyMT-Safe

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STANDARDSPOSIX.1-2001, POSIX.1-2008.

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EXAMPLESSee pthread_setschedparam(3).

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SEE ALSOpthread_attr_init(3), pthread_attr_setinheritsched(3), pthread_attr_setschedparam(3), pthread_create(3), pthread_setschedparam(3), pthread_setschedprio(3), pthreads(7), sched(7) 0

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