From cd6b4db6e8239ef2711e8c43a954650dc13a9a20 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=92=8B=E6=85=A7=E8=B5=9F?=
 <42379289+cnjhb@users.noreply.github.com>
Date: Sat, 18 Nov 2023 08:08:54 +0000
Subject: [PATCH] chore(timer): add assertions for null pointer (#4823)

---
 src/misc/lv_timer.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/misc/lv_timer.c b/src/misc/lv_timer.c
index 1af2785e5..7b7ec2f86 100644
--- a/src/misc/lv_timer.c
+++ b/src/misc/lv_timer.c
@@ -183,6 +183,7 @@ lv_timer_t * lv_timer_create(lv_timer_cb_t timer_xcb, uint32_t period, void * us
 
 void lv_timer_set_cb(lv_timer_t * timer, lv_timer_cb_t timer_cb)
 {
+    LV_ASSERT_NULL(timer);
     timer->timer_cb = timer_cb;
 }
 
@@ -196,42 +197,50 @@ void lv_timer_delete(lv_timer_t * timer)
 
 void lv_timer_pause(lv_timer_t * timer)
 {
+    LV_ASSERT_NULL(timer);
     timer->paused = true;
 }
 
 void lv_timer_resume(lv_timer_t * timer)
 {
+    LV_ASSERT_NULL(timer);
     timer->paused = false;
     lv_timer_handler_resume();
 }
 
 void lv_timer_set_period(lv_timer_t * timer, uint32_t period)
 {
+    LV_ASSERT_NULL(timer);
     timer->period = period;
 }
 
 void lv_timer_ready(lv_timer_t * timer)
 {
+    LV_ASSERT_NULL(timer);
     timer->last_run = lv_tick_get() - timer->period - 1;
 }
 
 void lv_timer_set_repeat_count(lv_timer_t * timer, int32_t repeat_count)
 {
+    LV_ASSERT_NULL(timer);
     timer->repeat_count = repeat_count;
 }
 
 void lv_timer_set_auto_delete(lv_timer_t * timer, bool auto_delete)
 {
+    LV_ASSERT_NULL(timer);
     timer->auto_delete = auto_delete;
 }
 
 void lv_timer_set_user_data(lv_timer_t * timer, void * user_data)
 {
+    LV_ASSERT_NULL(timer);
     timer->user_data = user_data;
 }
 
 void lv_timer_reset(lv_timer_t * timer)
 {
+    LV_ASSERT_NULL(timer);
     timer->last_run = lv_tick_get();
     lv_timer_handler_resume();
 }