pke: tear down levels + settle ECS before shutdown

1 files changed, 42 insertions, 1 deletions

diff --git a/src/game.cpp b/src/game.cpp
index 01aba10..f56e129 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -86,7 +86,7 @@ void Game_Tick(double delta) {
 		}
 	}
 
-	if (pkeSettings.rt.activeLevel->pke_cb_tick.func != nullptr) {
+	if (pkeSettings.rt.activeLevel && pkeSettings.rt.activeLevel->pke_cb_tick.func != nullptr) {
 		reinterpret_cast<void(*)(double delta)>(pkeSettings.rt.activeLevel->pke_cb_tick.func)(delta);
 	}
 
@@ -260,6 +260,47 @@ void pke_game_main_run() {
 void pke_game_main_teardown() {
 	fprintf(stdout, "[%s] pke_game_main_teardown Entering.\n", __FILE__);
 
+	// tear down any loaded levels
+	if (pkeSettings.rt.nextLevel != nullptr) {
+		if (pkeSettings.rt.nextLevel->pke_cb_teardown.func != nullptr) {
+			pkeSettings.rt.nextLevel->pke_cb_teardown.func();
+		}
+		pke_level_teardown(pkeSettings.rt.nextLevel);
+		pkeSettings.rt.nextLevel = nullptr;
+	}
+	if (pkeSettings.rt.activeLevel != nullptr) {
+		if (pkeSettings.rt.activeLevel->pke_cb_teardown.func != nullptr) {
+			pkeSettings.rt.activeLevel->pke_cb_teardown.func();
+		}
+		pke_level_teardown(pkeSettings.rt.activeLevel);
+		pkeSettings.rt.activeLevel = nullptr;
+	}
+	if (pkeSettings.rt.previousLevel != nullptr) {
+		if (pkeSettings.rt.previousLevel->pke_cb_teardown.func != nullptr) {
+			pkeSettings.rt.previousLevel->pke_cb_teardown.func();
+		}
+		pke_level_teardown(pkeSettings.rt.previousLevel);
+		pkeSettings.rt.previousLevel = nullptr;
+	}
+
+	// Tick until entities have settled.
+	// This allows things like nested entities (static_ui) to flush out.
+	// Without this, plugins will have their OnTeardown called before the engine
+	//  has had a chance to free anything active.
+	// Example: player input LIFO error if a loaded level had an active set.
+	pk_bkt_arr *bkt_arr_ents = ECS_GetEntities();
+	pk_bkt_arr_handle settle_handle_l  = pk_bkt_arr_handle_MAX;
+	pk_bkt_arr_handle settle_handle_r  = pk_bkt_arr_handle_MAX;
+	pk_bkt_arr_handle settle_handle_ll = bkt_arr_ents->head_l;
+	pk_bkt_arr_handle settle_handle_rr = bkt_arr_ents->head_r;
+	while (settle_handle_ll != settle_handle_l && settle_handle_rr != settle_handle_r) {
+		Game_Tick(0.f);
+		settle_handle_l = settle_handle_ll;
+		settle_handle_r = settle_handle_rr;
+		settle_handle_ll = bkt_arr_ents->head_l;
+		settle_handle_rr = bkt_arr_ents->head_r;
+	}
+
 	fprintf(stdout, "Game_Main SHUTDOWN INITIATED\n");
 #ifndef NDEBUG
 	// TODO debug print buckets before shutdown