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Added SDL_THREAD_PRIORITY_TIME_CRITICAL

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This commit is contained in:
Sam Lantinga
2018-04-23 22:07:56 -07:00
parent db94dfb1d5
commit f521b22eb5
6 changed files with 16 additions and 5 deletions
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2
src/audio/SDL_audio.c
View File

@@ -651,7 +651,7 @@ SDL_RunAudio(void *devicep)
SDL_assert(!device->iscapture);
/* The audio mixing is always a high priority thread */
SDL_SetThreadPriority(SDL_THREAD_PRIORITY_HIGH);
SDL_SetThreadPriority(SDL_THREAD_PRIORITY_TIME_CRITICAL);
/* Perform any thread setup */
device->threadid = SDL_ThreadID();

2
src/thread/psp/SDL_systhread.c
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@@ -97,6 +97,8 @@ int SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
if (priority == SDL_THREAD_PRIORITY_LOW) {
value = 19;
} else if (priority == SDL_THREAD_PRIORITY_HIGH) {
value = -10;
} else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) {
value = -20;
} else {
value = 0;

7
src/thread/pthread/SDL_systhread.c
View File

@@ -275,6 +275,8 @@ SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
if (priority == SDL_THREAD_PRIORITY_LOW) {
value = 19;
} else if (priority == SDL_THREAD_PRIORITY_HIGH) {
value = -10;
} else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) {
value = -20;
} else {
value = 0;
@@ -290,12 +292,15 @@ SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
}
if (priority == SDL_THREAD_PRIORITY_LOW) {
sched.sched_priority = sched_get_priority_min(policy);
} else if (priority == SDL_THREAD_PRIORITY_HIGH) {
} else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) {
sched.sched_priority = sched_get_priority_max(policy);
} 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 (pthread_setschedparam(thread, policy, &sched) != 0) {
return SDL_SetError("pthread_setschedparam() failed");

2
src/thread/windows/SDL_systhread.c
View File

@@ -231,6 +231,8 @@ SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
value = THREAD_PRIORITY_LOWEST;
} else if (priority == SDL_THREAD_PRIORITY_HIGH) {
value = THREAD_PRIORITY_HIGHEST;
} else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) {
value = THREAD_PRIORITY_TIME_CRITICAL;
} else {
value = THREAD_PRIORITY_NORMAL;
}