Implement hot reloading

engine/include/engine_hooks.h

@@ -21,14 +21,28 @@ typedef enum {
 	GAMESTATUS_QUIT,
 } gamestatus_t;
 
+typedef void
+game_init_t(int argc, char *argv[], void *mem, SDL_Renderer *renderer);
+typedef void game_teardown_t(void *mem);
+
+typedef gamestatus_t game_evt_t(void *mem, const SDL_Event *evt);
+typedef gamestatus_t game_update_t(void *mem, double dt);
+
+typedef void
+game_render_t(const void *mem, SDL_Renderer *renderer, long unsigned t);
+
+#define HOOKS_XLIST \
+	X(game_init) \
+	X(game_teardown) \
+	X(game_evt) \
+	X(game_update) \
+	X(game_render)
+
+#ifndef HOTRELOAD
 extern const engineconf_t game_conf;
-
-void game_init(int argc, char *argv[], void *mem, SDL_Renderer *renderer);
-void game_teardown(void *mem);
-
-gamestatus_t game_evt(void *mem, const SDL_Event *evt);
-gamestatus_t game_update(void *mem, double dt);
-
-void game_render(const void *mem, SDL_Renderer *renderer, long unsigned t);
+#define X(hook) hook##_t hook;
+HOOKS_XLIST
+#undef X
+#endif
 
 #endif