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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!
This commit is contained in:
Ryan C. Gordon 2022-04-20 14:07:30 -04:00
parent a40405d724
commit d4a01bfef0
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GPG Key ID: FA148B892AB48044
1 changed files with 5 additions and 5 deletions
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10
src/thread/os2/SDL_sysmutex.c
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@ -56,12 +56,12 @@ SDL_CreateMutex(void)
void
SDL_DestroyMutex(SDL_mutex * mutex)
{
ULONG ulRC;
HMTX hMtx = (HMTX)mutex;
ulRC = DosCloseMutexSem(hMtx);
if (ulRC != NO_ERROR) {
debug_os2("DosCloseMutexSem(), rc = %u", ulRC);
if (hMtx != NULLHANDLE) {
const ULONG ulRC = DosCloseMutexSem(hMtx);
if (ulRC != NO_ERROR) {
debug_os2("DosCloseMutexSem(), rc = %u", ulRC);
}
}
}