pthread_attr_setschedpolicy(3pthread)
pthread_attr_setschedpolicy, pthread_attr_getschedpolicy --
set and get schedpolicy attribute
Synopsis
cc [options] -Kthread file
#include <pthread.h>
int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);
int pthread_attr_getschedpolicy(const pthread_attr_t *attr,
int *policy);
Description
pthread_attr_setschedpolicy
and
pthread_attr_getschedpolicy
respectively, set and get the
schedpolicy
attribute in the
attr
argument.
The supported values of
policy
include SCHED_FIFO, SCHED_RR and SCHED_OTHER,
which are defined by the header
sched.h.
When threads executing with the scheduling policy
SCHED_FIFO or SCHED_RR are waiting on a mutex,
they acquire the mutex in priority order when the mutex is unlocked.
Usage
After these attributes have been set, a thread can be created with
the specified attributes using
pthread_create(3pthread).
Using these routines does not affect the current running thread.
Return values
If successful,
pthread_attr_setschedpolicy
and
pthread_attr_getschedpolicy
return zero.
Otherwise, an error number is returned to indicate the error.
Diagnostics
If the foolowing condition is detected,
pthread_attr_setschedpolicy
and
pthread_attr_getschedpolicy
will return the corresponding value:
EINVAL-
invalid attribute
If the following condition is detected,
pthread_attr_setschedpolicy
will return the corresponding value:
ENOTSUP-
attempt to set the attribute to an unsupported value
References
pthread_attr_init(3pthread),
pthread_attr_setscope(3pthread),
pthread_attr_setinheritsched(3pthread),
pthread_attr_setschedparam(3pthread),
pthread_create(3pthread),
pthread_setschedparam(3pthread),
pthread(4),
sched(4)
Standards compliance
The Single UNIX Specification, Version 2; The Open Group.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004