pthread_attr_setschedpolicy(3) - Linux manual page (original) (raw)

pthread...hedpolicy(3) Library Functions Manual pthread...hedpolicy(3)

NAME top

   pthread_attr_setschedpolicy, pthread_attr_getschedpolicy - set/get
   scheduling policy attribute in thread attributes object

LIBRARY top

   POSIX threads library (_libpthread_, _-lpthread_)

SYNOPSIS top

   **#include <pthread.h>**

   **int pthread_attr_setschedpolicy(pthread_attr_t ***_attr_**, int** _policy_**);**
   **int pthread_attr_getschedpolicy(const pthread_attr_t *restrict** _attr_**,**
                                   **int *restrict** _policy_**);**

DESCRIPTION top

   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)](../man7/sched.7.html).

   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)](../man3/pthread%5Fcreate.3.html), the caller must use
   [pthread_attr_setinheritsched(3)](../man3/pthread%5Fattr%5Fsetinheritsched.3.html) to set the inherit-scheduler
   attribute of the attributes object _attr_ to **PTHREAD_EXPLICIT_SCHED**.

RETURN VALUE top

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

ERRORS top

   **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 top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌──────────────────────────────────────┬───────────────┬─────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├──────────────────────────────────────┼───────────────┼─────────┤
   │ **pthread_attr_setschedpolicy**(),       │ Thread safety │ MT-Safe │
   │ **pthread_attr_getschedpolicy**()        │               │         │
   └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS top

   POSIX.1-2008.

HISTORY top

   glibc 2.0.  POSIX.1-2001.

EXAMPLES top

   See [pthread_setschedparam(3)](../man3/pthread%5Fsetschedparam.3.html).

SEE ALSO top

   [pthread_attr_init(3)](../man3/pthread%5Fattr%5Finit.3.html), [pthread_attr_setinheritsched(3)](../man3/pthread%5Fattr%5Fsetinheritsched.3.html),
   [pthread_attr_setschedparam(3)](../man3/pthread%5Fattr%5Fsetschedparam.3.html), [pthread_create(3)](../man3/pthread%5Fcreate.3.html),
   [pthread_setschedparam(3)](../man3/pthread%5Fsetschedparam.3.html), [pthread_setschedprio(3)](../man3/pthread%5Fsetschedprio.3.html), [pthreads(7)](../man7/pthreads.7.html),
   [sched(7)](../man7/sched.7.html)

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Linux man-pages 6.10 2024-07-23 pthread...hedpolicy(3)

Pages that refer to this page:pthread_attr_init(3), pthread_attr_setinheritsched(3), pthread_attr_setschedparam(3), pthread_attr_setscope(3), pthread_getattr_default_np(3), pthread_getattr_np(3), pthread_setschedparam(3), pthread_setschedprio(3)