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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | BUGS | EXAMPLE | SEE ALSO | COLOPHON |
PTHREAD_ATTR_SETINHERITSCHED(3) Programmer's ManualD_ATTR_SETINHERITSCHED(3)
pthread_attr_setinheritsched, pthread_attr_getinheritsched - set/get
inherit-scheduler attribute in thread attributes object
#include <pthread.h>
int pthread_attr_setinheritsched(pthread_attr_t *attr,
int inheritsched);
int pthread_attr_getinheritsched(const pthread_attr_t *attr,
int *inheritsched);
Compile and link with -pthread.
The pthread_attr_setinheritsched() function sets the inherit-
scheduler attribute of the thread attributes object referred to by
attr to the value specified in inheritsched. The inherit-scheduler
attribute determines whether a thread created using the thread
attributes object attr will inherit its scheduling attributes from
the calling thread or whether it will take them from attr.
The following scheduling attributes are affected by the inherit-
scheduler attribute: scheduling policy
(pthread_attr_setschedpolicy(3)), scheduling priority
(pthread_attr_setschedparam(3)), and contention scope
(pthread_attr_setscope(3)).
The following values may be specified in inheritsched:
PTHREAD_INHERIT_SCHED
Threads that are created using attr inherit scheduling
attributes from the creating thread; the scheduling attributes
in attr are ignored.
PTHREAD_EXPLICIT_SCHED
Threads that are created using attr take their scheduling
attributes from the values specified by the attributes object.
The default setting of the inherit-scheduler attribute in a newly
initialized thread attributes object is PTHREAD_INHERIT_SCHED.
The pthread_attr_getinheritsched() returns the inherit-scheduler
attribute of the thread attributes object attr in the buffer pointed
to by inheritsched.
On success, these functions return 0; on error, they return a nonzero
error number.
pthread_attr_setinheritsched() can fail with the following error:
EINVAL Invalid value in inheritsched.
POSIX.1 also documents an optional ENOTSUP error ("attempt was made
to set the attribute to an unsupported value") for
pthread_attr_setinheritsched().
For an explanation of the terms used in this section, see
attributes(7).
┌────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├────────────────────────────────┼───────────────┼─────────┤
│pthread_attr_setinheritsched(), │ Thread safety │ MT-Safe │
│pthread_attr_getinheritsched() │ │ │
└────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2001, POSIX.1-2008.
As at glibc 2.8, if a thread attributes object is initialized using
pthread_attr_init(3), then the scheduling policy of the attributes
object is set to SCHED_OTHER and the scheduling priority is set to 0.
However, if the inherit-scheduler attribute is then set to
PTHREAD_EXPLICIT_SCHED, then a thread created using the attribute
object wrongly inherits its scheduling attributes from the creating
thread. This bug does not occur if either the scheduling policy or
scheduling priority attribute is explicitly set in the thread
attributes object before calling pthread_create(3).
See pthread_setschedparam(3).
pthread_attr_init(3), pthread_attr_setschedparam(3),
pthread_attr_setschedpolicy(3), pthread_attr_setscope(3),
pthread_create(3), pthread_setschedparam(3), pthread_setschedprio(3),
pthreads(7), sched(7)
This page is part of release 4.12 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 2015-08-08 PTHREAD_ATTR_SETINHERITSCHED(3)
Pages that refer to this page: pthread_attr_init(3), pthread_attr_setschedparam(3), pthread_attr_setschedpolicy(3), pthread_attr_setscope(3), pthread_getattr_default_np(3), pthread_getattr_np(3), pthread_setschedparam(3), pthread_setschedprio(3)