#include <pthread.h> int
pthread_setschedparam (pthread_t thread int policy const struct sched_param *param); int
pthread_getschedparam (pthread_t thread int *policy struct sched_param *param);
DESCRIPTION
The
pthread_setschedparam ();
and
pthread_getschedparam ();
functions set and get the scheduling parameters of individual threads.
The scheduling policy for a thread can either be
SCHED_FIFO
(first in, first out),
SCHED_RR
(round-robin), or
SCHED_OTHER
(timesharing).
Valid thread priorities (accessed via
param->sched_priority
must be within the range returned by the
sched_get_priority_min2
and
sched_get_priority_max2
system calls.
RETURN VALUES
If successful, these functions return 0.
Otherwise, an error number is returned to indicate the error.
ERRORS
The
pthread_setschedparam ();
function will fail if:
Bq Er EINVAL
Invalid value for
Fa policy .
Bq Er ENOTSUP
Invalid value for scheduling parameters.
Bq Er ESRCH
Non-existent thread
Fa thread .
The
pthread_getschedparam ();
function will fail if:
Bq Er ESRCH
Non-existent thread
Fa thread .
SEE ALSO
sched_get_priority_max2,
sched_get_priority_min2
STANDARDS
The
pthread_setschedparam ();
and
pthread_getschedparam ();
functions conform to
St -susv2 .
