PTHREAD_ATTR_SETINHERITSCHED(3) Linux Programmer's Manual PTHREAD_ATTR_SETINHERITSCHED(3)
pthread_attr_setinheritsched, pthread_attr_getinheritsched - set/get inherit-scheduler
attribute in thread attributes object
int pthread_attr_setinheritsched(pthread_attr_t *attr,
int pthread_attr_getinheritsched(pthread_attr_t *attr,
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:
Threads that are created using attr inherit scheduling attributes from the creating
thread; the scheduling attributes in attr are ignored.
Threads that are created using attr take their scheduling attributes from the val-
ues 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().
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 schedul-
ing 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_attr_setscope(3), pthread_create(3),
pthread_setschedparam(3), pthread_setschedprio(3), pthreads(7)
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Linux 2013-04-19 PTHREAD_ATTR_SETINHERITSCHED(3)