#define INIT_COND_VAR PTHREAD_COND_INITIALIZER
#ifdef LOCK_DEBUG
-#define ACQUIRE_LOCK(mutex) fprintf(stderr, "ACQUIRE_LOCK(0x%p) %s %d\n", mutex,__FILE__,__LINE__); fflush(stderr); pthread_mutex_lock(mutex)
-#define RELEASE_LOCK(mutex) fprintf(stderr, "RELEASE_LOCK(0x%p) %s %d\n", mutex,__FILE__,__LINE__); fflush(stderr); pthread_mutex_unlock(mutex)
+#define ACQUIRE_LOCK(mutex) debugBelch("ACQUIRE_LOCK(0x%p) %s %d\n", mutex,__FILE__,__LINE__); pthread_mutex_lock(mutex)
+#define RELEASE_LOCK(mutex) debugBelch("RELEASE_LOCK(0x%p) %s %d\n", mutex,__FILE__,__LINE__); pthread_mutex_unlock(mutex)
#else
#define ACQUIRE_LOCK(mutex) pthread_mutex_lock(mutex)
#define RELEASE_LOCK(mutex) pthread_mutex_unlock(mutex)