Function sdl2_sys::SDL_LinuxSetThreadPriority

pub unsafe extern "C" fn SDL_LinuxSetThreadPriority(
    threadID: Sint64, 
    priority: c_int
) -> c_int

\brief Sets the UNIX nice value for a thread, using setpriority() if possible, and RealtimeKit if available.

\return 0 on success, or -1 on error.