x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
PTHREAD_ATTR_SETSCHEDPARAM(Linux Programmer's ManPTHREAD_ATTR_SETSCHEDPARAM(3)
NAME
pthread_attr_setschedparam, pthread_attr_getschedparam - set/get sched-
uling parameter attributes in thread attributes object
SYNOPSIS
#include <pthread.h>
int pthread_attr_setschedparam(pthread_attr_t *attr,
const struct sched_param *param);
int pthread_attr_getschedparam(const pthread_attr_t *attr,
struct sched_param *param);
Compile and link with -pthread.
DESCRIPTION
The pthread_attr_setschedparam() function sets the scheduling parameter
attributes of the thread attributes object referred to by attr to the
values specified in the buffer pointed to by param. These attributes
determine the scheduling parameters of a thread created using the
thread attributes object attr.
The pthread_attr_getschedparam() returns the scheduling parameter
attributes of the thread attributes object attr in the buffer pointed
to by param.
Scheduling parameters are maintained in the following structure:
struct sched_param {
int sched_priority; /* Scheduling priority */
};
As can be seen, only one scheduling parameter is supported. For
details of the permitted ranges for scheduling priorities in each
scheduling policy, see sched(7).
In order for the parameter setting made by pthread_attr_setschedparam()
to have effect when calling pthread_create(3), the caller must use
pthread_attr_setinheritsched(3) to set the inherit-scheduler attribute
of the attributes object attr to PTHREAD_EXPLICIT_SCHED.
RETURN VALUE
On success, these functions return 0; on error, they return a nonzero
error number.
ERRORS
POSIX.1 documents EINVAL and ENOTSUP errors for pthread_attr_setsched-
param(). On Linux these functions always succeed (but portable and
future-proof applications should nevertheless handle a possible error
return).
ATTRIBUTES
Multithreading (see pthreads(7))
The pthread_attr_setschedparam() and pthread_attr_getschedparam() func-
tions are thread-safe.
CONFORMING TO
POSIX.1-2001.
NOTES
See pthread_attr_setschedpolicy(3) for a list of the thread scheduling
policies supported on Linux.
EXAMPLE
See pthread_setschedparam(3).
SEE ALSO
sched_get_priority_min(2), pthread_attr_init(3),
pthread_attr_setinheritsched(3), pthread_attr_setschedpolicy(3),
pthread_create(3), pthread_setschedparam(3), pthread_setschedprio(3),
pthreads(7). sched(7)
COLOPHON
This page is part of release 3.69 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
http://www.kernel.org/doc/man-pages/.
Linux 2014-05-21 PTHREAD_ATTR_SETSCHEDPARAM(3)
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