sched_get_priority_min()

Get the minimum priority for the scheduling policy

Synopsis:

#include <sched.h>

int sched_get_priority_min( int policy );

Since:

BlackBerry 10.0.0

Arguments:

policy
The scheduling policy, which must be 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 — similar to SCHED_FIFO, except that 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 pthread_attr_setschedpolicy(), and " Scheduling policies " in the chapter on the QNX Neutrino microkernel in the System Architecture guide.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The sched_get_priority_min() function returns the minimum value for the scheduling policy specified by policy.

Returns:

The appropriate minimum for success, or -1 ( errno is set).

Errors:

EINVAL
The value of the policy parameter doesn't represent a defined scheduling policy.
ENOSYS
The sched_get_priority_min() function isn't currently supported.

Classification:

POSIX 1003.1 PS

Safety:  
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Yes

Last modified: 2014-11-17



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