Originální popis anglicky:
pthread_attr_getschedpolicy, pthread_attr_setschedpolicy - get and set the
schedpolicy attribute (
REALTIME THREADS)
Návod, kniha: POSIX Programmer's Manual
#include <pthread.h>
int pthread_attr_getschedpolicy(const pthread_attr_t *restrict
attr,
int *restrict
policy );
int pthread_attr_setschedpolicy(pthread_attr_t *
attr, int policy);
The
pthread_attr_getschedpolicy() and
pthread_attr_setschedpolicy() functions, respectively, shall get and
set the
schedpolicy attribute in the
attr argument.
The supported values of
policy shall include SCHED_FIFO, SCHED_RR, and
SCHED_OTHER, which are defined in the
<sched.h> header. When
threads executing with the scheduling policy SCHED_FIFO, SCHED_RR, or
SCHED_SPORADIC are waiting on a mutex, they shall acquire the mutex in
priority order when the mutex is unlocked.
If successful, the
pthread_attr_getschedpolicy() and
pthread_attr_setschedpolicy() functions shall return zero; otherwise,
an error number shall be returned to indicate the error.
The
pthread_attr_setschedpolicy() function may fail if:
- EINVAL
- The value of policy is not valid.
- ENOTSUP
- An attempt was made to set the attribute to an unsupported
value.
These functions shall not return an error code of [EINTR].
The following sections are informative.
None.
After these attributes have been set, a thread can be created with the specified
attributes using
pthread_create(). Using these routines does not affect
the current running thread.
None.
None.
pthread_attr_destroy() ,
pthread_attr_getscope() ,
pthread_attr_getinheritsched() ,
pthread_attr_getschedparam() ,
pthread_create() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<pthread.h>,
<sched.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
