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BusyBox, written by Richard Stallman in 1995, is a software suite that provides several Unix utilities in a single executable file.
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thr_setprio(3c) [opensolaris man page]

thr_getprio(3C) 					   Standard C Library Functions 					   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) SunOS 5.11 1 Apr 2008 thr_getprio(3C)

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thr_getprio(3C) 					   Standard C Library Functions 					   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 dynamically changes the priority of the thread specified by target_thread within the current process to the pri- ority specified by priority. By default, threads contend for synchronization objects based on fixed priorities that range from 0, the least significant, to 127. The target_thread will receive precedence by libthread over lower priority threads with respect to synchro- nization object contention. The thr_getprio() function stores the current priority for the thread specified by target_thread in the location pointed to by priority. Thread priorities regulate the order in which threads unblock from synchronization objects and are different from realtime priorities, which regulate and enforce access to CPU resources. Programs that need access to "real" priorities should use bound threads in the realtime class (see priocntl(2)). RETURN VALUES
If successful, the thr_getprio() and thr_setprio() return 0. Otherwise, an error number is returned to indicate the error. ERRORS
For each of the following conditions, these functions return an error number if the condition is detected. ESRCH The value specified by target_thread does not refer to an existing thread. The thr_getprio() and thr_setprio() functions may fail if: EINVAL The value of priority makes no sense for the scheduling class associated with the target_thread. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
priocntl(2), sched_setparam(3RT), thr_create(3C), thr_suspend(3C), thr_yield(3C), attributes(5), standards(5) SunOS 5.10 22 Mar 2001 thr_getprio(3C)

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