1 files changed, 12 insertions, 3 deletions

diff --git a/timer/src/timer.c b/timer/src/timer.c
index d886f59..c934077 100644
--- a/timer/src/timer.c
+++ b/timer/src/timer.c
@@ -37,11 +37,20 @@ void timer_start(Timer* timer) {
   timer->delta_time   = 0;
 }
 
+static void timer_update(Timer* timer, time_point this_tick) {
+  timer->running_time = time_diff(timer->start_time, this_tick);
+  timer->delta_time   = time_diff(timer->last_tick, this_tick);
+  timer->last_tick    = this_tick;
+}
+
 void timer_tick(Timer* timer) {
   const time_point this_tick = time_now();
-  timer->running_time        = time_diff(timer->start_time, this_tick);
-  timer->delta_time          = time_diff(timer->last_tick, this_tick);
-  timer->last_tick           = this_tick;
+  timer_update(timer, this_tick);
+}
+
+void timer_advance(Timer* timer, time_delta t) {
+  const time_point this_tick = time_add(timer->start_time, t);
+  timer_update(timer, this_tick);
 }
 
 time_point time_now(void) {