man pages section 3: Basic Library Functions

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Updated: July 2014
 
 

thr_getprio(3C)

Name

thr_getprio, thr_setprio - access dynamic thread scheduling

Synopsis

cc –mt [ flag... ] file...[ library... ]
#include <thread.h> 

int thr_setprio(thread_t target_thread, int priority);
int thr_getprio(thread_t target_thread, int *priority);

Description

The thr_setprio() function sets the scheduling priority for the thread specified by target_thread within the current process to the value given by priority.

The thr_getprio() function stores the current priority for the thread specified by target_thread in the location pointed to by priority.

If the thr_setprio() function fails, the scheduling priority of the target thread is not changed.

See priocntl(2), pthread_setschedprio(3C), and sched_setparam(3C).

Return Values

If successful, the thr_getprio() and thr_setprio() functions return 0. Otherwise, an error number is returned to indicate the error.

Errors

The thr_getprio() and thr_setprio() functions will fail if:

ESRCH

The value specified by target_thread does not refer to an existing thread.

The thr_setprio() function will fail if:

EINVAL

The value of priority is invalid for the scheduling policy of the specified thread.

EPERM

The caller does not have the appropriate permission to set the priority to the value specified.

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
MT-Level
MT-Safe

See Also

priocntl(2), pthread_setschedprio(3C), sched_setparam(3C), thr_create(3C), thr_suspend(3C), thr_yield(3C), attributes(5), standards (5)