pthread_attr_setschedpolicy(3)pthread_attr_setschedpolicy(3)NAMEpthread_attr_setschedpolicy - Changes the scheduling policy attribute
of the specified thread attributes object
SYNOPSIS
#include <pthread.h>
int pthread_attr_setschedpolicy(
pthread_attr_t *attr,
int policy );
LIBRARY
DECthreads POSIX 1003.1c Library (libpthread.so)
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
IEEE Std 1003.1c-1995, POSIX System Application Program Interface
PARAMETERS
Thread attributes object to be modified. New value for the scheduling
policy attribute. Valid values are as follows: SCHED_FIFO, SCHED_RR,
SCHED_FG_NP (also known as SCHED_OTHER), SCHED_BG_NP SCHED_OTHER is the
default value.
DESCRIPTION
This routine sets the scheduling policy of a thread that is created
using the attributes object specified by the attr argument. The default
value of the scheduling attribute is SCHED_OTHER.
By default, a created thread inherits the priority of the thread call‐
ing pthread_create(3). To specify a policy using this routine, schedul‐
ing inheritance must be disabled at the time the thread is created.
Before calling pthread_create(3), call pthread_attr_setinheritsched(3)
and specify the value PTHREAD_EXPLICIT_SCHED for the inherit argument.
Never attempt to use scheduling as a mechanism for synchronization.
RETURN VALUES
If an error condition occurs, this routine returns an integer value
indicating the type of error. Possible return values are as follows:
Successful completion. The value specified by policy is invalid.
ERRORS
None
SEE ALSO
Functions: pthread_attr_init(3), pthread_attr_getschedpolicy(3),
pthread_attr_setinheritsched(3), pthread_attr_setschedparam(3),
pthread_create(3)
Manuals: Guide to DECthreads and Programmer's Guide
pthread_attr_setschedpolicy(3)
