fixed spelling in us

added async to us

framework/engine/src/mm/update_strategies/default_strategy.cpp

@@ -1,6 +1,7 @@
 #include "./default_strategy.hpp"
 
 #include <cassert>
+#include <functional>
 
 namespace MM::UpdateStrategies {
 
@@ -206,17 +207,27 @@ void SingleThreadedDefault::doUpdate(MM::Engine& engine) {
 	// post
 	runType(engine, update_phase_t::POST);
 
-	if (!_defered_queue.empty()) {
-		for (auto&& fn : _defered_queue) {
+	// simulate async
+	for (size_t i = 0; !_async_queue.empty() && i < _max_async_per_tick; i++) {
+		_async_queue.back()(engine);
+		_async_queue.pop_back();
+	}
+
+	if (!_deferred_queue.empty()) {
+		for (auto&& fn : _deferred_queue) {
 			fn(engine);
 		}
 
-		_defered_queue.clear();
+		_deferred_queue.clear();
 	}
 }
 
-void SingleThreadedDefault::addDefered(std::function<void(Engine&)> function) {
-	_defered_queue.emplace_back(std::move(function));
+void SingleThreadedDefault::addDeferred(std::function<void(Engine&)> function) {
+	_deferred_queue.emplace_back(std::move(function));
+}
+
+void SingleThreadedDefault::addAsync(std::function<void(Engine&)> function) {
+	_async_queue.emplace_back(std::move(function));
 }
 
 #undef __L_ASSERT

framework/engine/src/mm/update_strategies/default_strategy.hpp

@@ -44,7 +44,9 @@ class SingleThreadedDefault : public MM::UpdateStrategies::UpdateStrategy {
 		std::set<update_key_t> _main_active;
 		std::set<update_key_t> _post_active;
 
-		std::vector<std::function<void(Engine&)>> _defered_queue;
+		std::vector<std::function<void(Engine&)>> _deferred_queue;
+		std::vector<std::function<void(Engine&)>> _async_queue;
+		const size_t _max_async_per_tick = 5; // prevent blocking, this should be finetuned
 
 	private:
 		Graph& getGraph(update_phase_t phase);
@@ -72,7 +74,9 @@ class SingleThreadedDefault : public MM::UpdateStrategies::UpdateStrategy {
 
 		bool depend(const update_key_t A, const update_key_t B) override;
 
-		void addDefered(std::function<void(Engine&)> function) override;
+		void addDeferred(std::function<void(Engine&)> function) override;
+
+		void addAsync(std::function<void(Engine&)> function) override;
 };
 
 } // MM::UpdateStrategies

framework/engine/src/mm/update_strategies/update_strategy.hpp

@@ -69,10 +69,13 @@ class UpdateStrategy {
 		// WIP:
 
 		// dont use, if you are not using it to modify the engine.
-		// you usualy dont need to use this, if you think you need to use this, you probably dont.
-		//virtual void addFixedDefered(std::function<void(Engine&)> function) = 0;
-		virtual void addDefered(std::function<void(Engine&)> function) = 0; // called after everything
+		// you usually dont need to use this, if you think you need to use this, you probably dont.
+		virtual void addDeferred(std::function<void(Engine&)> function) = 0; // called after everything
 
+		// adds a task, which does not need to be completed on the end of the tick.
+		// warning: in a single-threaded environment, they will still be done on the main thread, so blocking is not a option
+		// note: the US might decide to limit the amount of executed asyncs per tick (eg. when single-threaded)
+		virtual void addAsync(std::function<void(Engine&)> function) = 0;
 		//virtual std::future addAsync(std::function<void(Engine&)> function) = 0;
 };
 

framework/engine/test/default_us_test.cpp

@@ -29,6 +29,33 @@ TEST(default_update_strategy, simple_update) {
 	engine.update();
 }
 
+// note: we test pure single-threaded behaviour, so nothing needs to be thread save
+TEST(default_update_strategy, async) {
+	int counter = 1;
+	MM::Engine engine(std::make_unique<MM::UpdateStrategies::SingleThreadedDefault>());
+	ASSERT_EQ(counter, 1);
+
+	engine.getUpdateStrategy().addAsync([&counter](MM::Engine&) { counter++; });
+
+	engine.update();
+
+	ASSERT_EQ(counter, 2);
+
+	for (size_t i = 0; i < 100; i++) {
+		engine.getUpdateStrategy().addAsync([&counter](MM::Engine&) { counter++; });
+	}
+
+	// make sure we dont have an infinity loop in case something is wrong
+	size_t max_loop_safety_count = 0;
+
+	do {
+		engine.update();
+		max_loop_safety_count++;
+	} while (counter != 102 && max_loop_safety_count < 10000);
+
+	ASSERT_EQ(counter, 102);
+}
+
 TEST(default_update_strategy, service) {
 	class TmpMockService : public MockService {
 		public:
@@ -56,7 +83,6 @@ TEST(default_update_strategy, service) {
 	}
 }
 
-
 TEST(default_update_strategy, run_1) {
 	class TmpMockService : public MockService {
 		int& _counter;
@@ -96,7 +122,7 @@ TEST(default_update_strategy, run_1) {
 		ASSERT_TRUE(engine.enableService<TmpMockService>());
 		ASSERT_EQ(counter, 1);
 
-		engine.getUpdateStrategy().addDefered([](MM::Engine& e) { e.stop(); });
+		engine.getUpdateStrategy().addDeferred([](MM::Engine& e) { e.stop(); });
 
 		engine.run();
 

framework/engine/test/update_strategy_test.cpp

@@ -1,4 +1,3 @@
-#include "mm/services/service.hpp"
 #include <gtest/gtest.h>
 #include <gmock/gmock.h>
 
@@ -36,7 +35,8 @@ class MockUpdateStrategy : public MM::UpdateStrategies::UpdateStrategy {
 
 		MOCK_METHOD(bool, depend, (const MM::UpdateStrategies::update_key_t A, const MM::UpdateStrategies::update_key_t B), (override));
 
-		MOCK_METHOD(void, addDefered, (std::function<void(MM::Engine&)> function), (override));
+		MOCK_METHOD(void, addDeferred, (std::function<void(MM::Engine&)> function), (override));
+		MOCK_METHOD(void, addAsync, (std::function<void(MM::Engine&)> function), (override));
 };
 
 class MockService : public MM::Services::Service {

framework/screen_director/src/mm/services/screen_director.cpp

@@ -39,7 +39,7 @@ std::vector<UpdateStrategies::UpdateCreationInfo> ScreenDirector::registerUpdate
 
 void ScreenDirector::update(MM::Engine& engine) {
 	if (curr_screen_id != queued_screen_id) {
-		engine.getUpdateStrategy().addDefered([this](MM::Engine& e) {
+		engine.getUpdateStrategy().addDeferred([this](MM::Engine& e) {
 			changeScreenTo(e, queued_screen_id);
 		});
 	}

framework/sdl_service/test/start_test.cpp

@@ -104,7 +104,7 @@ TEST(sdl_service, event_handle_reg) {
 	};
 
 	// register forge
-	engine.getUpdateStrategy().addDefered(event_forge_f);
+	engine.getUpdateStrategy().addDeferred(event_forge_f);
 
 	// register sdl event handler to just stop the engine
 	auto* stop_event_hook_h = sdl_ss_ptr->addEventHandler([&engine](const SDL_Event&){ engine.stop(); return true; });

framework/simple_scene/test/ss_test.cpp

@@ -61,7 +61,7 @@ TEST(simple_scene, change_scene) {
 		ASSERT_TRUE(sss->getScene().valid(e));
 
 		//engine.fixedUpdate();
-		engine.getUpdateStrategy().addDefered([](MM::Engine& eng) {eng.stop();});
+		engine.getUpdateStrategy().addDeferred([](MM::Engine& eng) {eng.stop();});
 		engine.run();
 
 		ASSERT_FALSE(sss->getScene().valid(e));

systems/player_velocity/test/player_velocity_test.cpp

@@ -37,8 +37,9 @@ TEST(player_velocity, basic_run) {
 	//v.velocity = { 1.f, 1.f };
 	//v.rotation = 0.f;
 
-	engine.getUpdateStrategy().addDefered([](auto& e) { e.stop(); });
-	engine.run();
+	//engine.getUpdateStrategy().addDeferred([](auto& e) { e.stop(); });
+	//engine.run();
+	engine.update();
 
 	//ASSERT_EQ(t.position.x, 1.f * delta);
 	// TODO: TEST