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(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 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.1-2001 also documents an optional ENOTSUP error ("attempt was made to
set the attribute to an unsupported value") for
pthread_attr_setinheritsched().
POSIX.1-2001.
See pthread_setschedparam(3).
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).
sched_setscheduler(2), pthread_attr_init(3), pthread_attr_setschedparam(3),
pthread_attr_setschedpolicy(3), pthread_create(3), pthread_setschedparam(3),
pthread_setschedprio(3), pthreads(7)
This page is part of release 3.32 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/.
Linux 2008-11-10 PTHREAD_ATTR_SETINHERITSCHED(3)
HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface