POSIX_SPAWNATTR_GETSCHEDPARPOSIX Programmer's POSIX_SPAWNATTR_GETSCHEDPARAM(P)NAME
posix_spawnattr_getschedparam, posix_spawnattr_setschedparam - get and
set the spawn-schedparam attribute of a spawn attributes object
(ADVANCED REALTIME)
SYNOPSIS
#include <spawn.h>
#include <sched.h>
int posix_spawnattr_getschedparam(const posix_spawnattr_t *
restrict attr, struct sched_param *restrict schedparam);
int posix_spawnattr_setschedparam(posix_spawnattr_t *restrict attr,
const struct sched_param *restrict schedparam);
DESCRIPTION
The posix_spawnattr_getschedparam() function shall obtain the value of
the spawn-schedparam attribute from the attributes object referenced by
attr.
The posix_spawnattr_setschedparam() function shall set the spawn-sched‐
param attribute in an initialized attributes object referenced by attr.
The spawn-schedparam attribute represents the scheduling parameters to
be assigned to the new process image in a spawn operation (if
POSIX_SPAWN_SETSCHEDULER or POSIX_SPAWN_SETSCHEDPARAM is set in the
spawn-flags attribute). The default value of this attribute is unspeci‐
fied.
RETURN VALUE
Upon successful completion, posix_spawnattr_getschedparam() shall
return zero and store the value of the spawn-schedparam attribute of
attr into the object referenced by the schedparam parameter; otherwise,
an error number shall be returned to indicate the error.
Upon successful completion, posix_spawnattr_setschedparam() 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_setschedparam() 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 ALSOposix_spawn() , posix_spawnattr_destroy() , posix_spawnattr_init() ,
posix_spawnattr_getsigdefault() , posix_spawnattr_getflags() ,
posix_spawnattr_getpgroup() , posix_spawnattr_getschedpolicy() ,
posix_spawnattr_getsigmask() , posix_spawnattr_setsigdefault() ,
posix_spawnattr_setflags() , posix_spawnattr_setpgroup() , posix_spaw‐
nattr_setschedpolicy() , 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 .
IEEE/The Open Group 2003 POSIX_SPAWNATTR_GETSCHEDPARAM(P)
