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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 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_setscheduler(2).

       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.1-2001 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
       This page is part of release 3.54 of the Linux man-pages project.  A description of the project, and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.