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os2: SDL_DestroyMutex should ignore NULL mutexes. 

Every other backend does this, so this should match, now.
It's possible this was harmless, but we can avoid the system call
and the (likely?) debug message when it fails, though!
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Ryan C. Gordon 2022-04-20 14:07:30 -04:00
parent a40405d724
commit d4a01bfef0
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1 changed files with 5 additions and 5 deletions
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6
src/thread/os2/SDL_sysmutex.c
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@ -56,13 +56,13 @@ SDL_CreateMutex(void)
void void
SDL_DestroyMutex(SDL_mutex * mutex) SDL_DestroyMutex(SDL_mutex * mutex)
{ {
ULONG ulRC;
HMTX hMtx = (HMTX)mutex; HMTX hMtx = (HMTX)mutex;
if (hMtx != NULLHANDLE) {
ulRC = DosCloseMutexSem(hMtx); const ULONG ulRC = DosCloseMutexSem(hMtx);
if (ulRC != NO_ERROR) { if (ulRC != NO_ERROR) {
debug_os2("DosCloseMutexSem(), rc = %u", ulRC); debug_os2("DosCloseMutexSem(), rc = %u", ulRC);
} }
}
} }
/* Lock the mutex */ /* Lock the mutex */