PTHREAD_ATTR_SETSCHEDPOLICYLinux Programmer's MaPTHREAD_ATTR_SETSCHEDPOLICY(3)



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(const 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 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.

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

ERRORS
       pthread_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_setsched-
       policy().

ATTRIBUTES
       For  an	explanation  of	 the  terms  used   in	 this	section,   see
       attributes(7).

       +-------------------------------+---------------+---------+
       |Interface		       | Attribute     | Value	 |
       +-------------------------------+---------------+---------+
       |pthread_attr_setschedpolicy(), | Thread safety | MT-Safe |
       |pthread_attr_getschedpolicy()  |	       |	 |
       +-------------------------------+---------------+---------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008.

EXAMPLE
       See pthread_setschedparam(3).

SEE ALSO
       pthread_attr_init(3), pthread_attr_setinheritsched(3),
       pthread_attr_setschedparam(3), pthread_create(3),
       pthread_setschedparam(3), pthread_setschedprio(3), pthreads(7),
       sched(7)

COLOPHON
       This page is part of release 4.10 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.



Linux				  2015-08-08	PTHREAD_ATTR_SETSCHEDPOLICY(3)