NAME
posix_spawnattr_getschedpolicy, posix_spawnattr_setschedpolicy - get
and set the spawn-schedpolicy attribute of a spawn attributes object
(ADVANCED REALTIME)
SYNOPSIS
#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);
DESCRIPTION
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.
RETURN VALUE
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.
ERRORS
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.
EXAMPLES
None.
APPLICATION USAGE
These functions are part of the Spawn and Process Scheduling options
and need not be provided on all implementations.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
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>
COPYRIGHT
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 .