Refactor QueueUITask helper

lib/queue/action-queue.cpp

@@ -420,11 +420,10 @@ static bool queueWithNameExists(const std::string &name)
 	return !GetWeakActionQueueByName(name).expired();
 }
 
-static void signalImportedQueues(void *varsPtr)
+static void
+signalImportedQueues(const std::vector<std::shared_ptr<Item>> &queues)
 {
-	auto queues = std::unique_ptr<std::vector<std::shared_ptr<Item>>>(
-		static_cast<std::vector<std::shared_ptr<Item>> *>(varsPtr));
-	for (const auto &queue : *queues) {
+	for (const auto &queue : queues) {
 		ActionQueueSignalManager::Instance()->Add(
 			QString::fromStdString(queue->Name()));
 	}
@@ -436,7 +435,7 @@ void ImportQueues(obs_data_t *data)
 		obs_data_get_array(data, "actionQueues");
 	size_t count = obs_data_array_count(array);
 
-	auto importedQueues = new std::vector<std::shared_ptr<Item>>;
+	std::vector<std::shared_ptr<Item>> importedQueues;
 
 	for (size_t i = 0; i < count; i++) {
 		OBSDataAutoRelease arrayElement = obs_data_array_item(array, i);
@@ -446,10 +445,11 @@ void ImportQueues(obs_data_t *data)
 			continue;
 		}
 		queues.emplace_back(queue);
-		importedQueues->emplace_back(queue);
+		importedQueues.emplace_back(queue);
 	}
 
-	QueueUITask(signalImportedQueues, importedQueues);
+	QueueUITask(
+		[importedQueues]() { signalImportedQueues(importedQueues); });
 }
 
 std::weak_ptr<ActionQueue> GetWeakActionQueueByName(const std::string &name)

lib/utils/temp-variable.cpp

@@ -734,12 +734,10 @@ TempVarSignalManager *TempVarSignalManager::Instance()
 void NotifyUIAboutTempVarChange(MacroSegment *segment)
 {
 	IncrementTempVarInUseGeneration();
-	QueueUITask(
-		[](void *segment) {
-			TempVarSignalManager::Instance()->SegmentTempVarsChanged(
-				(MacroSegment *)segment);
-		},
-		segment);
+	QueueUITask([segment]() {
+		TempVarSignalManager::Instance()->SegmentTempVarsChanged(
+			segment);
+	});
 }
 
 TempVarOutputMappingsWidget::TempVarOutputMappingsWidget(QWidget *parent)

lib/utils/ui-helpers.cpp

@@ -184,9 +184,9 @@ std::string GetThemeTypeName()
 #endif
 }
 
-void QueueUITask(void (*task)(void *param), void *param)
+void QueueUITaskRaw(void (*task)(void *param), void *param, bool wait)
 {
-	obs_queue_task(OBS_TASK_UI, task, param, false);
+	obs_queue_task(OBS_TASK_UI, task, param, wait);
 }
 
 bool IsCursorInWidgetArea(QWidget *widget)

lib/utils/ui-helpers.hpp

@@ -6,7 +6,10 @@
 #include <QIcon>
 #include <QString>
 
+#include <memory>
 #include <string>
+#include <type_traits>
+#include <utility>
 
 class QAbstractButton;
 class QComboBox;
@@ -38,7 +41,23 @@ EXPORT void DisplayTrayMessage(const QString &title, const QString &msg,
 EXPORT std::string GetThemeTypeName();
 EXPORT QWidget *GetSettingsWindow();
 
-EXPORT void QueueUITask(void (*task)(void *param), void *param);
+EXPORT void QueueUITaskRaw(void (*task)(void *param), void *param,
+			   bool wait = false);
+
+// Runs func on the main/UI thread; blocks if wait is true.
+template<typename F> void QueueUITask(F &&func, bool wait = false)
+{
+	using FnType = std::decay_t<F>;
+	auto *heapFunc = new FnType(std::forward<F>(func));
+
+	QueueUITaskRaw(
+		[](void *param) {
+			std::unique_ptr<FnType> fn(
+				static_cast<FnType *>(param));
+			(*fn)();
+		},
+		heapFunc, wait);
+}
 
 bool IsCursorInWidgetArea(QWidget *widget);
 

lib/variables/variable.cpp

@@ -504,11 +504,10 @@ void LoadVariables(obs_data_t *obj)
 	}
 }
 
-static void signalImportedVariables(void *varsPtr)
+static void
+signalImportedVariables(const std::vector<std::shared_ptr<Item>> &vars)
 {
-	auto vars = std::unique_ptr<std::vector<std::shared_ptr<Item>>>(
-		static_cast<std::vector<std::shared_ptr<Item>> *>(varsPtr));
-	for (const auto &var : *vars) {
+	for (const auto &var : vars) {
 		VariableSignalManager::Instance()->Add(
 			QString::fromStdString(var->Name()));
 	}
@@ -519,7 +518,7 @@ void ImportVariables(obs_data_t *data)
 	OBSDataArrayAutoRelease array = obs_data_get_array(data, "variables");
 	size_t count = obs_data_array_count(array);
 
-	auto importedVars = new std::vector<std::shared_ptr<Item>>;
+	std::vector<std::shared_ptr<Item>> importedVars;
 
 	for (size_t i = 0; i < count; i++) {
 		OBSDataAutoRelease arrayElement = obs_data_array_item(array, i);
@@ -531,10 +530,11 @@ void ImportVariables(obs_data_t *data)
 		}
 
 		GetVariables().emplace_back(var);
-		importedVars->emplace_back(var);
+		importedVars.emplace_back(var);
 	}
 
-	QueueUITask(signalImportedVariables, importedVars);
+	QueueUITask(
+		[importedVars]() { signalImportedVariables(importedVars); });
 }
 
 std::chrono::high_resolution_clock::time_point GetLastVariableChangeTime()

plugins/base/macro-action-scene-collection.cpp

@@ -17,20 +17,6 @@ bool MacroActionSceneCollection::_registered = MacroActionFactory::Register(
 	 MacroActionSceneCollectionEdit::Create,
 	 "AdvSceneSwitcher.action.sceneCollection"});
 
-template<typename F> void QueueUITaskLambda(F &&func)
-{
-	using FnType = std::decay_t<F>;
-	auto *heapFunc = new FnType(std::forward<F>(func));
-
-	QueueUITask(
-		[](void *param) {
-			std::unique_ptr<FnType> fn(
-				static_cast<FnType *>(param));
-			(*fn)();
-		},
-		heapFunc);
-}
-
 bool MacroActionSceneCollection::PerformAction()
 {
 	// Changing the scene collection will also reload the settings of the
@@ -41,7 +27,7 @@ bool MacroActionSceneCollection::PerformAction()
 	}
 
 	const auto collectionName = _sceneCollection;
-	QueueUITaskLambda([collectionName]() {
+	QueueUITask([collectionName]() {
 		obs_frontend_set_current_scene_collection(
 			collectionName.c_str());
 	});

plugins/base/macro-action-source.cpp

@@ -185,20 +185,6 @@ static void closeSourceDialog(obs_source_t *source, bool accept,
 	}
 }
 
-template<typename F> void QueueUITaskLambda(F &&func)
-{
-	using FnType = std::decay_t<F>;
-	auto *heapFunc = new FnType(std::forward<F>(func));
-
-	QueueUITask(
-		[](void *param) {
-			std::unique_ptr<FnType> fn(
-				static_cast<FnType *>(param));
-			(*fn)();
-		},
-		heapFunc);
-}
-
 bool MacroActionSource::PerformAction()
 {
 	OBSSource s = obs_weak_source_get_source(_source.GetSource());
@@ -271,17 +257,17 @@ bool MacroActionSource::PerformAction()
 			break;
 		}
 
-		QueueUITaskLambda([&]() {
+		QueueUITask([&]() {
 			closeSourceDialog(s, true, "OBSBasicInteraction");
 		});
 		break;
 	case Action::CLOSE_FILTER_DIALOG:
-		QueueUITaskLambda([&]() {
+		QueueUITask([&]() {
 			closeSourceDialog(s, _acceptDialog, "OBSBasicFilters");
 		});
 		break;
 	case Action::CLOSE_PROPERTIES_DIALOG:
-		QueueUITaskLambda([&]() {
+		QueueUITask([&]() {
 			closeSourceDialog(s, _acceptDialog,
 					  "OBSBasicProperties");
 		});

plugins/twitch/twitch-tab.cpp

@@ -31,14 +31,9 @@ static bool setup()
 	static const auto showInvalidWarnings = [](void *) {
 		const auto invalidTokens = getInvalidTokens();
 		for (const auto &token : invalidTokens) {
-			QueueUITask(
-				[](void *tokenPtr) {
-					auto tokenName = static_cast<QString *>(
-						tokenPtr);
-					InvalidTokenDialog::ShowWarning(
-						*tokenName);
-				},
-				(void *)&token);
+			QueueUITask([token]() {
+				InvalidTokenDialog::ShowWarning(token);
+			});
 		}
 	};
 

tests/stubs/ui-helpers.cpp

@@ -40,7 +40,7 @@ std::string GetThemeTypeName()
 	return "Dark";
 }
 
-void QueueUITask(void (*task)(void *param), void *) {}
+void QueueUITaskRaw(void (*task)(void *param), void *, bool) {}
 
 QWidget *GetSettingsWindow()
 {