How to set thread priority pthreads on Mac OS

Question

I've found:

pthread_setschedprio() 

here: http://www.kernel.org/doc/man-pages/online/pages/man3/pthread_setschedprio.3.html

But I can't find any valid values for thread priority. For Windows I've found very clear possible value, like:

THREAD_PRIORITY_BELOW_NORMAL
THREAD_PRIORITY_NORMAL
THREAD_PRIORITY_ABOVE_NORMAL

but for Mac OS I didn't found anything. I can't use Cocoa NSThreads class, I need to use POSIX threads.

Do you know how to set thread priority pthreads on Mac OS?

Answer 1

AFAIK pthread_setschedprio() doesn't exist on macOS. You can only set the priority of a thread when you create it using pthread_setschedparam().

And as for priority, see documentation for pthread_setschedparam():

Valid thread priorities (accessed via param->sched_priority) must be within the range returned by the sched_get_priority_min(2) and sched_get_priority_max(2) system calls.