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_setschedpolicy().

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.

EXAMPLES

       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 5.10 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                                              2020-06-09                     PTHREAD_ATTR_SETSCHEDPOLICY(3)