try fix memory error

src/Game.cpp

@@ -1,3 +1,4 @@
+#include <mutex>
 #include <thread>
 #include <functional>
 #include "GameRenderer.hpp"
@@ -17,7 +18,8 @@ Game::~Game()
 void Game::update(std::stop_token stop_token)
 {
     while (!stop_token.stop_requested()) {
-        game_mutex.lock();
+        {
+            auto lock = std::lock_guard(game_mutex);
 
             ticks++;
 
@@ -38,8 +40,7 @@ void Game::update(std::stop_token stop_token)
             renderer.redraw();
 
             map.check_bounds(player.x, player.y);
-
-        game_mutex.unlock();
+        }
 
         std::this_thread::sleep_for(16666us);
     }
@@ -47,7 +48,7 @@ void Game::update(std::stop_token stop_token)
 
 void Game::draw()
 {
-    const std::lock_guard lock(game_mutex);
+    std::lock_guard lock(game_mutex);
 
     renderer.clear_screen(0x80, 0x40, 0xFF, 0xFF);
 
@@ -64,12 +65,15 @@ void Game::draw()
 
 void Game::run()
 {
-    update_thread = std::jthread(std::bind_front(&Game::update, this));
+    auto update_thread = std::jthread(std::bind_front(&Game::update, this));
 
     while (true) {
         SDL_Event e;
         SDL_WaitEvent(&e);
 
+        {
+            auto lock = std::lock_guard(game_mutex);
+
             if (e.type == SDL_QUIT) {
                 break;
             }
@@ -119,6 +123,7 @@ void Game::run()
             int mouse_x, mouse_y;
             SDL_GetMouseState(&mouse_x, &mouse_y);
             player.angle = std::atan2(mouse_y - renderer.screen_height / 2, mouse_x - renderer.screen_width / 2);
+        }
 
         draw();
     }

src/Game.hpp

@@ -19,7 +19,6 @@ private:
     std::vector<Arrow*> arrows;
     std::vector<Zombo*> zombos;
 
-    std::jthread update_thread;
     std::mutex game_mutex;
     unsigned int ticks = 0;