#define LOCK_INIT(name)
#define LOCK_GC pthread_mutex_lock (&gc_mutex)
#define UNLOCK_GC pthread_mutex_unlock (&gc_mutex)
+#define LOCK_INTERRUPTION pthread_mutex_lock (&interruption_mutex)
+#define UNLOCK_INTERRUPTION pthread_mutex_unlock (&interruption_mutex)
/* non-pthread will need to provide their own version of start/stop */
#define USE_SIGNAL_BASED_START_STOP_WORLD 1