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Updated thread priorities for Apple operating systems
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slouken committed Apr 1, 2020
1 parent 377f2d3 commit 378a5cfb61307b2ab70db8c6d850b506cf80d0d2
Showing with 16 additions and 3 deletions.
  1. +16 −3 src/thread/pthread/SDL_systhread.c
@@ -220,9 +220,22 @@ SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
} else {
int min_priority = sched_get_priority_min(policy);
int max_priority = sched_get_priority_max(policy);
sched.sched_priority = (min_priority + (max_priority - min_priority) / 2);
if (priority == SDL_THREAD_PRIORITY_HIGH) {
sched.sched_priority += ((max_priority - min_priority) / 4);

#if defined(__MACOSX__) || defined(__IPHONEOS__) || defined(__TVOS__)
if (min_priority == 15 && max_priority == 47) {
/* Apple has a specific set of thread priorities */
if (priority == SDL_THREAD_PRIORITY_HIGH) {
sched.sched_priority = 45;
} else {
sched.sched_priority = 37;
}
} else
#endif /* __MACOSX__ || __IPHONEOS__ || __TVOS__ */
{
sched.sched_priority = (min_priority + (max_priority - min_priority) / 2);
if (priority == SDL_THREAD_PRIORITY_HIGH) {
sched.sched_priority += ((max_priority - min_priority) / 4);
}
}
}
if (pthread_setschedparam(thread, policy, &sched) != 0) {

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