non-blocking http

apps/RenderCadenceCompositor/app/RuntimeLayerController.cpp

@@ -50,6 +50,8 @@ void RuntimeLayerController::Stop()
 
 ControlActionResult RuntimeLayerController::HandleAddLayer(const std::string& body)
 {
+	CleanupRetiredShaderBuilds();
+
 	std::string shaderId;
 	std::string error;
 	if (!ExtractStringField(body, "shaderId", shaderId, error))
@@ -69,6 +71,8 @@ ControlActionResult RuntimeLayerController::HandleAddLayer(const std::string& bo
 
 ControlActionResult RuntimeLayerController::HandleRemoveLayer(const std::string& body)
 {
+	CleanupRetiredShaderBuilds();
+
 	std::string layerId;
 	std::string error;
 	if (!ExtractStringField(body, "layerId", layerId, error))
@@ -81,7 +85,7 @@ ControlActionResult RuntimeLayerController::HandleRemoveLayer(const std::string&
 	}
 
 	Log("runtime-shader", "Layer removed: " + layerId);
-	StopLayerShaderBuild(layerId);
+	RetireLayerShaderBuild(layerId);
 	PublishRuntimeRenderLayers();
 	return { true, std::string() };
 }
@@ -125,6 +129,9 @@ void RuntimeLayerController::InitializeLayerModel(std::string& runtimeShaderId)
 
 void RuntimeLayerController::StartLayerShaderBuild(const std::string& layerId, const std::string& shaderId)
 {
+	CleanupRetiredShaderBuilds();
+	RetireLayerShaderBuild(layerId);
+
 	{
 		std::lock_guard<std::mutex> lock(mRuntimeLayerMutex);
 		std::string error;
@@ -135,9 +142,6 @@ void RuntimeLayerController::StartLayerShaderBuild(const std::string& layerId, c
 	RuntimeShaderBridge* bridgePtr = bridge.get();
 	{
 		std::lock_guard<std::mutex> lock(mShaderBuildMutex);
-		auto existingIt = mShaderBuilds.find(layerId);
-		if (existingIt != mShaderBuilds.end())
-			existingIt->second->Stop();
 		mShaderBuilds[layerId] = std::move(bridge);
 	}
 
@@ -154,7 +158,7 @@ void RuntimeLayerController::StartLayerShaderBuild(const std::string& layerId, c
 		});
 }
 
-void RuntimeLayerController::StopLayerShaderBuild(const std::string& layerId)
+void RuntimeLayerController::RetireLayerShaderBuild(const std::string& layerId)
 {
 	std::unique_ptr<RuntimeShaderBridge> bridge;
 	{
@@ -164,19 +168,45 @@ void RuntimeLayerController::StopLayerShaderBuild(const std::string& layerId)
 			return;
 		bridge = std::move(bridgeIt->second);
 		mShaderBuilds.erase(bridgeIt);
+		bridge->RequestStop();
+		mRetiredShaderBuilds.push_back(std::move(bridge));
 	}
-	bridge->Stop();
+}
+
+void RuntimeLayerController::CleanupRetiredShaderBuilds()
+{
+	std::vector<std::unique_ptr<RuntimeShaderBridge>> readyToStop;
+	{
+		std::lock_guard<std::mutex> lock(mShaderBuildMutex);
+		for (auto it = mRetiredShaderBuilds.begin(); it != mRetiredShaderBuilds.end();)
+		{
+			if ((*it)->CanStopWithoutWaiting())
+			{
+				readyToStop.push_back(std::move(*it));
+				it = mRetiredShaderBuilds.erase(it);
+				continue;
+			}
+			++it;
+		}
+	}
+
+	for (std::unique_ptr<RuntimeShaderBridge>& bridge : readyToStop)
+		bridge->Stop();
 }
 
 void RuntimeLayerController::StopAllRuntimeShaderBuilds()
 {
 	std::map<std::string, std::unique_ptr<RuntimeShaderBridge>> builds;
+	std::vector<std::unique_ptr<RuntimeShaderBridge>> retiredBuilds;
 	{
 		std::lock_guard<std::mutex> lock(mShaderBuildMutex);
 		builds.swap(mShaderBuilds);
+		retiredBuilds.swap(mRetiredShaderBuilds);
 	}
 	for (auto& entry : builds)
 		entry.second->Stop();
+	for (auto& bridge : retiredBuilds)
+		bridge->Stop();
 }
 
 void RuntimeLayerController::PublishRuntimeRenderLayers()