Originální popis anglicky:
posix_spawnattr_getschedpolicy, posix_spawnattr_setschedpolicy - get and set the
spawn-schedpolicy attribute of a spawn attributes object (
ADVANCED
REALTIME)
Návod, kniha: POSIX Programmer's Manual
#include <spawn.h>
#include <sched.h>
int posix_spawnattr_getschedpolicy(const posix_spawnattr_t *
restrict
attr , int *restrict
schedpolicy);
int posix_spawnattr_setschedpolicy(posix_spawnattr_t *
attr,
int
schedpolicy);
The
posix_spawnattr_getschedpolicy() function shall obtain the value of
the
spawn-schedpolicy attribute from the attributes object referenced
by
attr.
The
posix_spawnattr_setschedpolicy() function shall set the
spawn-schedpolicy attribute in an initialized attributes object
referenced by
attr.
The
spawn-schedpolicy attribute represents the scheduling policy to be
assigned to the new process image in a spawn operation (if
POSIX_SPAWN_SETSCHEDULER is set in the
spawn-flags attribute). The
default value of this attribute is unspecified.
Upon successful completion,
posix_spawnattr_getschedpolicy() shall return
zero and store the value of the
spawn-schedpolicy attribute of
attr into the object referenced by the
schedpolicy parameter;
otherwise, an error number shall be returned to indicate the error.
Upon successful completion,
posix_spawnattr_setschedpolicy() shall return
zero; otherwise, an error number shall be returned to indicate the error.
These functions may fail if:
- EINVAL
- The value specified by attr is invalid.
The
posix_spawnattr_setschedpolicy() function may fail if:
- EINVAL
- The value of the attribute being set is not valid.
The following sections are informative.
None.
These functions are part of the Spawn and Process Scheduling options and need
not be provided on all implementations.
None.
None.
posix_spawn() ,
posix_spawnattr_destroy() ,
posix_spawnattr_init() ,
posix_spawnattr_getsigdefault() ,
posix_spawnattr_getflags() ,
posix_spawnattr_getpgroup() ,
posix_spawnattr_getschedparam() ,
posix_spawnattr_getsigmask() ,
posix_spawnattr_setsigdefault() ,
posix_spawnattr_setflags() ,
posix_spawnattr_setpgroup() ,
posix_spawnattr_setschedparam() ,
posix_spawnattr_setsigmask() ,
posix_spawnp() , the Base
Definitions volume of IEEE Std 1003.1-2001,
<sched.h>,
<spawn.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
.
