NAME

sched_get_priority_max, sched_get_priority_min — get priority limits (REALTIME)

SYNOPSIS

[PS|TPS] #include <sched.h>

int sched_get_priority_max(int policy);
int sched_get_priority_min(int policy);

DESCRIPTION

The sched_get_priority_max() and sched_get_priority_min() functions shall return the appropriate maximum or minimum, respectively, for the scheduling policy specified by policy.

The value of policy shall be one of the scheduling policy values defined in <sched.h>.

RETURN VALUE

If successful, the sched_get_priority_max() and sched_get_priority_min() functions shall return the appropriate maximum or minimum values, respectively. If unsuccessful, they shall return a value of -1 and set errno to indicate the error.

ERRORS

The sched_get_priority_max() and sched_get_priority_min() functions shall fail if:

[EINVAL]

The value of the policy parameter does not represent a defined scheduling policy.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

sched_getparam, sched_setparam, sched_getscheduler, sched_rr_get_interval, sched_setscheduler

XBD <sched.h>

CHANGE HISTORY

First released in Issue 5. Included for alignment with the POSIX Realtime Extension.

Issue 6

These functions are marked as part of the Process Scheduling option.

The [ENOSYS] error condition has been removed as stubs need not be provided if an implementation does not support the Process Scheduling option.

The [ESRCH] error condition has been removed since these functions do not take a pid argument.

IEEE Std 1003.1-2001/Cor 1-2002, item XSH/TC1/D6/52 is applied, changing the PS margin code in the SYNOPSIS to PS|TPS.