By default SDL_SetCurrentThreadPriority
will make appropriate system changes in order to apply a thread priority. For example on systems using
pthreads the scheduler policy is changed automatically to a policy that works well with a given priority.
Code which has specific requirements can override SDL's default behavior with this hint.
pthread hint values are "current", "other", "fifo" and "rr". Currently no other platform hint values are
defined but may be in the future.
On Linux, the kernel may send SIGKILL to realtime tasks which exceed the distro configured execution
budget for rtkit. This budget can be queried through RLIMIT_RTTIME after calling
SDL_SetCurrentThreadPriority ().
This hint should be set before calling
SDL_SetCurrentThreadPriority ()