Digital

NAME

sched_get_priority_max, sched_get_priority_min − return the maximum or minimum priority for the specified scheduling policy (P1003.4/D10)

SYNOPSIS

#include <sched.h>

int sched_get_priority_max (
int policy) ;

int sched_get_priority_min (
int policy) ;

PARAMETERS

policy One of the scheduling policies as defined in <sched.h>. 

DESCRIPTION

The sched_get_priority_max and sched_get_priority_min functions return the maximum or minimum priority for the specified scheduling policy. The value of the policy argument must be one of the scheduling policies (SCHED_FIFO, SCHED_RR, or SCHED_OTHER), as defined in <sched.h>. 

No special privileges are needed to use the sched_get_priority_max and sched_get_priority_min functions. 

RETURN VALUES

On a successful call, the requested value is returned.  If a call fails to complete successfully, a value of −1 is returned, and errno is set to indicate the error. 

ERRORS

The sched_get_priority_max and sched_get_priority_min functions fail under the following conditions:

[EINVAL] The value of the policy argument does not represent a defined scheduling policy. 

[ENOSYS] P1003.4/D10 priority scheduling is not configured in this implementation.  Refer to the DEC OSF/1 Realtime Installation Guide for information on how to install the realtime software. 

RELATED INFORMATION

sched_getscheduler(3), sched_get_sched_param(3), sched_setscheduler(3), sched_set_sched_param(3)