posix_spawnattr_getschedparam, posix_spawnattr_setschedparam - get and set the spawn-schedparam attribute of a spawn attributes object (ADVANCED REALTIME)
[SPN PS] #include <spawn.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);
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-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.
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.
These functions may fail if:
- The value specified by attr is invalid.
The posix_spawnattr_setschedparam() function may fail if:
- The value of the attribute being set is not valid.
These functions are part of the Spawn and Process Scheduling options and need not be provided on all implementations.
posix_spawn, posix_spawnattr_destroy, posix_spawnattr_getsigdefault, posix_spawnattr_getflags, posix_spawnattr_getpgroup, posix_spawnattr_getschedpolicy, posix_spawnattr_getsigmask
XBD <sched.h>, <spawn.h>
First released in Issue 6. Derived from IEEE Std 1003.1d-1999.
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