posix_spawnattr_getschedparam

, posix_spawnattr_setschedparam

- get and set spawn-schedparam attribute of spawn attributes object

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 obtains the value of the spawn-schedparam attribute from the attributes object referenced by attr.

The posix_spawnattr_setschedparam() function sets the spawn-schedparam 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 unspecified.

Return Values

Upon successful completion, posix_spawnattr_getschedparam() returns 0 and stores the value of the spawn-schedparam attribute of attr into the object referenced by the schedparam parameter. Otherwise, an error number is returned to indicate the error.

Upon successful completion, posix_spawnattr_setschedparam() returns 0. Otherwise, an error number is 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.

Attributes

See attributes(5) for descriptions of the following attributes:

See Also

posix_spawn(3C), posix_spawnattr_destroy(3C), posix_spawnattr_getflags(3C), posix_spawnattr_getpgroup(3C), posix_spawnattr_getschedpolicy(3C), posix_spawnattr_getsigdefault(3C), posix_spawnattr_getsigmask(3C), attributes(5), standards(5)