* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
+#ifndef __VLC_MTIME_H
+# define __VLC_MTIME_H 1
+
/*****************************************************************************
* LAST_MDATE: date which will never happen
*****************************************************************************
*****************************************************************************/
#define MSTRTIME_MAX_SIZE 22
-/* Well, Duh? But it does clue us in that we are converting from
- millisecond quantity to a second quantity or vice versa.
-*/
-#define MILLISECONDS_PER_SEC 1000
-
-#define msecstotimestr(psz_buffer, msecs) \
- secstotimestr( psz_buffer, (msecs / (int) MILLISECONDS_PER_SEC) )
-
/*****************************************************************************
* Prototypes
*****************************************************************************/
VLC_EXPORT( mtime_t, mdate, ( void ) );
VLC_EXPORT( void, mwait, ( mtime_t date ) );
VLC_EXPORT( void, msleep, ( mtime_t delay ) );
-VLC_EXPORT( char *, secstotimestr, ( char *psz_buffer, int secs ) );
+VLC_EXPORT( char *, secstotimestr, ( char *psz_buffer, int32_t secs ) );
+
+# 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")))
+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))
+
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((error("deadlines can not be constant")))
+mtime_t impossible_deadline( mtime_t deadline )
+{
+ return deadline;
+}
+
+# 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
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_ */