X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=include%2Fvlc_mtime.h;h=60063eabf6c388c6026863444a5f97eb0a33e71b;hb=1cf900257c53220308faef51a94a52f4db01173d;hp=324c8eb38668717cdf1ee3adb7a45020f96d5e88;hpb=b22e2a9f33242e1fb69b9811b839fab4a97e1f23;p=vlc

diff --git a/include/vlc_mtime.h b/include/vlc_mtime.h
index 324c8eb386..60063eabf6 100644
--- a/include/vlc_mtime.h
+++ b/include/vlc_mtime.h
@@ -68,41 +68,63 @@ VLC_EXPORT( void,    mwait,    ( mtime_t date ) );
 VLC_EXPORT( void,    msleep,   ( mtime_t delay ) );
 VLC_EXPORT( char *,  secstotimestr, ( char *psz_buffer, int secs ) );
 
-#ifdef __GNUC__
-# ifdef __linux__
-#  define VLC_HARD_MIN_SLEEP 1000 /* Linux has 100, 250, 300 or 1000Hz */
-# else
-#  define VLC_HARD_MIN_SLEEP 0
-# endif
-#define VLC_SOFT_MIN_SLEEP 29000000
+# define VLC_HARD_MIN_SLEEP 10000   /* 10 milliseconds = 1 tick at 100Hz */
+
+#if defined (__GNUC__) \
+ && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+/* Linux has 100, 250, 300 or 1000Hz
+ *
+ * HZ=100 by default on FreeBSD, but some architectures use a 1000Hz timer
+ */
+# define VLC_SOFT_MIN_SLEEP 9000000 /* 9 seconds */
 
 static
 __attribute__((unused))
 __attribute__((noinline))
 __attribute__((error("sorry, cannot sleep for such short a time")))
-void impossible_msleep( mtime_t delay )
+mtime_t impossible_delay( mtime_t delay )
 {
     (void) delay;
-    msleep( VLC_HARD_MIN_SLEEP );
+    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))
+
 static
 __attribute__((unused))
 __attribute__((noinline))
-__attribute__((warning("use proper event handling instead")))
-void bad_msleep( mtime_t delay )
+__attribute__((error("deadlines can not be constant")))
+mtime_t impossible_deadline( mtime_t deadline )
 {
-    msleep( delay );
+    return deadline;
 }
 
-# define msleep( d ) \
-    (__builtin_constant_p(d < VLC_HARD_MIN_SLEEP) \
-       ? impossible_msleep(d) \
-       : (__builtin_constant_p(d < VLC_SOFT_MIN_SLEEP) \
-           ? bad_msleep(d) \
-           : msleep(d)))
+# define check_deadline( d ) \
+    (__builtin_constant_p(d) ? impossible_deadline(d) : d)
+#else
+# define check_delay(d) (d)
+# define check_deadline(d) (d)
 #endif
 
+#define msleep(d) msleep(check_delay(d))
+#define mwait(d) mwait(check_deadline(d))
+
 /*****************************************************************************
  * date_t: date incrementation without long-term rounding errors
  *****************************************************************************/
@@ -120,5 +142,6 @@ VLC_EXPORT( void,    date_Set,       ( date_t *, mtime_t ) );
 VLC_EXPORT( mtime_t, date_Get,       ( const date_t * ) );
 VLC_EXPORT( void,    date_Move,      ( date_t *, mtime_t ) );
 VLC_EXPORT( mtime_t, date_Increment, ( date_t *, uint32_t ) );
+VLC_EXPORT( mtime_t, date_Decrement, ( date_t *, uint32_t ) );
 VLC_EXPORT( uint64_t, NTPtime64,     ( void ) );
 #endif /* !__VLC_MTIME_ */