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/.