pthread_attr_getschedpolicy

       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
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