[clock]添加 rt_tick_get_delta 函数

1 files changed, 1 insertions, 0 deletions

diff --git a/include/rtthread.h b/include/rtthread.h
index a1c0e77a03..103e26e894 100644
--- a/include/rtthread.h
+++ b/include/rtthread.h
@@ -98,6 +98,7 @@ void rt_object_put_sethook(void (*hook)(struct rt_object *object));
  * clock & timer interface
  */
 rt_tick_t rt_tick_get(void);
+rt_tick_t rt_tick_get_delta(rt_tick_t base);
 void rt_tick_set(rt_tick_t tick);
 void rt_tick_increase(void);
 void rt_tick_increase_tick(rt_tick_t tick);