+#else /* !USE_PTHREADS */
+
+#define _nc_mutex_init(obj) /* nothing */
+
+#define _nc_lock_global(name) /* nothing */
+#define _nc_try_global(name) 0
+#define _nc_unlock_global(name) /* nothing */
+
+#define _nc_lock_window(name) (void) TRUE
+#define _nc_unlock_window(name) /* nothing */
+
+#endif /* USE_PTHREADS */
+
+#define _nc_lock_screen(name) /* nothing */
+#define _nc_unlock_screen(name) /* nothing */
+