pthread_setschedparam

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thread

The ID of the thread that you want to set the scheduling parameters for. You can get a thread ID by calling pthread_create() pthread_self() .

policy

The new scheduling policy; one of:

SCHED_FIFO — a fixed-priority scheduler in which the highest priority, ready thread runs until it blocks or is preempted by a higher priority thread.

SCHED_RR — the same as SCHED_FIFO , except threads at the same priority level timeslice (round robin) every 4 × the clock period (see ClockPeriod() ).

SCHED_OTHER — currently the same as SCHED_RR .

SCHED_SPORADIC — sporadic scheduling.

For more information, see “ Thread scheduling ” in the QNX Neutrino Microkernel chapter of the System Architecture guide.

param

A pointer to a sched_param structure that specifies the scheduling parameters that you want to use.

The pthread_setschedparam() function sets the scheduling policy and associated scheduling parameters of thread thread to the values specified in policy and param .

Returns:

Success.

EINVAL

Invalid scheduling policy policy or parameters param .

ENOTSUP

Unsupported scheduling policy policy or parameters param .

EPERM

Insufficient privilege to modify scheduling policy policy or parameters param .

ESRCH

Invalid thread ID thread .

“ Thread scheduling ” in the QNX Neutrino Microkernel chapter of the System Architecture guide

“ Scheduling policies ”