allocate RenderState, and SDLHandles outside memory arena

src/main.cpp

@@ -111,21 +111,35 @@ initAssets(memory_arena* arena,
 RenderState*
 initRenderState(memory_arena* arena)
 {
-	RenderState* rs = ARENA_ALLOC(arena, RenderState, 1);
+	RenderState* rs = UTIL_ALLOC(1, RenderState);
 
 	if (rs) {
 		rs->arena = arena;
 		rs->assets = initAssets(arena);
 		rs->gl_ctx = initGLContext(arena);
 		rs->xforms = ARENA_ALLOC(arena, transforms, 1);
-		rs->handles = ARENA_ALLOC(arena, SDLHandles, 1);
+		//rs->handles = ARENA_ALLOC(arena, SDLHandles, 1);
+		rs->handles = UTIL_ALLOC(1, SDLHandles);
 		rs->max_gl_meshes = 256;
+		// TODO: should have a different arena for gl_meshes, because these will
+		// 	be the most volatile objects
 		rs->gl_meshes = ARENA_ALLOC(arena, GLmesh, rs->max_gl_meshes);
 	}
 
 	return rs;
 }
 
+void
+freeRenderState(RenderState*& rs)
+{
+	if (rs) {
+		arenaFree(rs->arena);
+		utilSafeFree(rs->handles);
+		utilSafeFree(rs);
+		rs = nullptr;
+	}
+}
+
 bool
 initGraphics(SDLHandles* handles)
 {
@@ -318,12 +332,12 @@ loop(RenderState* rs)
 }
 
 void
-quit(RenderState* rs)
+quit(RenderState*& rs)
 {
 	SDL_GL_DeleteContext(rs->handles->sdl_gl_ctx);
 	SDL_DestroyWindow(rs->handles->window);
 	SDL_Quit();
-	std::free(rs->arena);
+	freeRenderState(rs);
 }
 
 int