#define DEFINE_MUTEX(m) pthread_mutex_t (m) = PTHREAD_MUTEX_INITIALIZER;
#define DECLARE_MUTEX(m) extern pthread_mutex_t (m);
#define DEFINE_MUTEX(m) pthread_mutex_t (m) = PTHREAD_MUTEX_INITIALIZER;
#define DECLARE_MUTEX(m) extern pthread_mutex_t (m);