only one timer at a time, usage of atomic

AutoOBSRBRestart.lua

@@ -28,28 +28,31 @@ function script_unload()
   monitor.stop_hook()
 end
 
+
 function check_restart()
+  obs.timer_remove(check_restart)
   monitor.start_hook()
   obs.timer_add(check_idle, idle_time * 1000)
 end
 
 function check_idle()
+  obs.timer_remove(check_idle)
   local current_time = os.time()
   local last_input_time = monitor.last_input_received()
 
   if current_time - last_input_time >= idle_time then
     monitor.stop_hook()
-    obs.timer_remove(check_idle)
-    restart_replay_buffer()
-  end
-end
 
-function restart_replay_buffer()
-  obs.obs_frontend_replay_buffer_stop()
-  obs.timer_add(start_replay_buffer, 2000)
+    obs.obs_frontend_replay_buffer_stop()
+    obs.timer_add(start_replay_buffer, 2000)
+  else
+    obs.timer_add(check_idle, idle_time * 1000)
+  end
 end
 
 function start_replay_buffer()
   obs.timer_remove(start_replay_buffer)
   obs.obs_frontend_replay_buffer_start()
+
+  obs.timer_add(check_restart, wait_time * 1000)
 end

monitor.c

@@ -1,20 +1,23 @@
+#include <stdatomic.h>
 #include <time.h>
 #include <windows.h>
 
-static long long last_input_time = 0;
+static atomic_llong last_input_time = 0;
 
 HHOOK hKeyboardHook = NULL;
 
 LRESULT CALLBACK KeyboardHookProc(int nCode, WPARAM wParam, LPARAM lParam) {
   if (nCode == HC_ACTION) {
-    last_input_time = time(NULL);
+    atomic_store(&last_input_time, time(NULL));
   }
 
   return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
 }
 
 __declspec(dllexport) void start_hook(void) {
-  hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProc, NULL, 0);
+  if (!hKeyboardHook) {
+    hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProc, NULL, 0);
+  }
 }
 
 __declspec(dllexport) void stop_hook(void) {
@@ -25,5 +28,5 @@ __declspec(dllexport) void stop_hook(void) {
 }
 
 __declspec(dllexport) long long last_input_received(void) {
-  return last_input_time;
+  return atomic_load(&last_input_time);
 }