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authorMax Kellermann <max@duempel.org>2010-11-05 09:39:50 +0100
committerMax Kellermann <max@duempel.org>2010-11-05 09:39:56 +0100
commitad430c661780ed196d772564f9a49d5dacb5df0f (patch)
tree3038fd6ebea6663a3942428552b66e480ea74982
parentec48b5ea3ac25d4b27c3b942017309b408fc3ac0 (diff)
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timer: add function timer_delay()
-rw-r--r--src/timer.c13
-rw-r--r--src/timer.h6
2 files changed, 19 insertions, 0 deletions
diff --git a/src/timer.c b/src/timer.c
index 57ad8d0ed..49c2ee3ac 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -71,6 +71,19 @@ void timer_add(Timer *timer, int size)
timer->time += ((uint64_t)size * 1000000) / timer->rate;
}
+unsigned
+timer_delay(const Timer *timer)
+{
+ int64_t delay = timer->time - now();
+ if (delay < 0)
+ return 0;
+
+ if (delay > 1000 * 1000 * 1000)
+ return 1000 * 1000;
+
+ return delay / 1000;
+}
+
void timer_sync(Timer *timer)
{
int64_t sleep_duration;
diff --git a/src/timer.h b/src/timer.h
index 684367bc5..bbd895b31 100644
--- a/src/timer.h
+++ b/src/timer.h
@@ -40,6 +40,12 @@ void timer_reset(Timer *timer);
void timer_add(Timer *timer, int size);
+/**
+ * Returns the number of milliseconds to sleep to get back to sync.
+ */
+unsigned
+timer_delay(const Timer *timer);
+
void timer_sync(Timer *timer);
#endif