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thread: fix inconsistent return values
- SDL_CreateMutex returns NULL when the creation fails (ngage) - SDL_SemValue returns 0 when the semaphore is NULL (n3ds) (cherry picked from commit 6875e1c262ae968a4fb52b367cf6912d9c76d4c9)
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@ -114,7 +114,8 @@ Uint32
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SDL_SemValue(SDL_sem *sem)
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{
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if (sem == NULL) {
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return SDL_InvalidParamError("sem");
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SDL_InvalidParamError("sem");
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return 0;
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}
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return sem->semaphore.current_count;
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}
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@ -48,6 +48,7 @@ SDL_CreateMutex(void)
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TInt status = CreateUnique(NewMutex, &rmutex, NULL);
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if (status != KErrNone) {
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SDL_SetError("Couldn't create mutex.");
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return NULL;
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}
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SDL_mutex* mutex = new /*(ELeave)*/ SDL_mutex;
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mutex->handle = rmutex.Handle();
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