+#if defined (__GNUC__) && defined (__linux__)
+# define VLC_HARD_MIN_SLEEP 1000 /* Linux has 100, 250, 300 or 1000Hz */
+# define VLC_SOFT_MIN_SLEEP 9000000
+
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((error("sorry, cannot sleep for such short a time")))
+mtime_t impossible_delay( mtime_t delay )
+{
+ (void) delay;
+ return VLC_HARD_MIN_SLEEP;
+}
+
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((warning("use proper event handling instead of short delay")))
+mtime_t harmful_delay( mtime_t delay )
+{
+ return delay;
+}
+
+# define check_delay( d ) \
+ ((__builtin_constant_p(d < VLC_HARD_MIN_SLEEP) \
+ && (d < VLC_HARD_MIN_SLEEP)) \
+ ? impossible_delay(d) \
+ : ((__builtin_constant_p(d < VLC_SOFT_MIN_SLEEP) \
+ && (d < VLC_SOFT_MIN_SLEEP)) \
+ ? harmful_delay(d) \
+ : d))
+