__pthread_mutex_lock
status_t __pthread_mutex_lock(pthread_mutex_t* mutex, bigtime_t timeout);
__libc_maybe_call (__pthread_mutex_lock, (&(NAME).mutex), 0)
return __pthread_mutex_lock(mutex, 0, B_INFINITE_TIMEOUT);
return __pthread_mutex_lock(mutex, B_ABSOLUTE_REAL_TIME_TIMEOUT, -1);
status_t status = __pthread_mutex_lock(mutex, flags, timeout);