Mercurial > sdl-ios-xcode
diff src/thread/generic/SDL_syssem.c @ 1627:aee7ea396f59
Fixed bug #179
SDL_SemValue() always returns 0. That's because the underlying POSIX
sem_getvalue() is implemented as a noop in Mac OS X. Apart from that,
semaphores do work properly (at least according to test/testsem), so I'm not
sure if this is worth fixing at all.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 13 Apr 2006 14:04:13 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
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--- a/src/thread/generic/SDL_syssem.c Thu Apr 13 13:38:40 2006 +0000 +++ b/src/thread/generic/SDL_syssem.c Thu Apr 13 14:04:13 2006 +0000 @@ -87,7 +87,7 @@ sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); if ( ! sem ) { SDL_OutOfMemory(); - return(0); + return NULL; } sem->count = initial_value; sem->waiters_count = 0; @@ -96,10 +96,10 @@ sem->count_nonzero = SDL_CreateCond(); if ( ! sem->count_lock || ! sem->count_nonzero ) { SDL_DestroySemaphore(sem); - return(0); + return NULL; } - return(sem); + return sem; } /* WARNING: @@ -114,9 +114,11 @@ SDL_Delay(10); } SDL_DestroyCond(sem->count_nonzero); - SDL_mutexP(sem->count_lock); - SDL_mutexV(sem->count_lock); - SDL_DestroyMutex(sem->count_lock); + if ( sem->count_lock ) { + SDL_mutexP(sem->count_lock); + SDL_mutexV(sem->count_lock); + SDL_DestroyMutex(sem->count_lock); + } SDL_free(sem); } }