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internal/CalculatorUnitTests/AsyncHelper.cpp

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#include "pch.h"
+#include "AsyncHelper.h"
+#include <chrono>
+#include <thread>
+
+using namespace std;
+using namespace concurrency;
+using namespace Platform;
+using namespace CalculatorApp;
+using namespace Windows::UI::Core;
+using namespace Windows::ApplicationModel::Core;
+
+task<void> AsyncHelper::RunOnUIThreadAsync(function<void()>&& action)
+{
+    auto callback = ref new DispatchedHandler([action]()
+    {
+        action();
+    });
+
+    return create_task(CoreApplication::MainView->CoreWindow->Dispatcher->RunAsync(CoreDispatcherPriority::Normal, callback));
+}
+
+void AsyncHelper::RunOnUIThread(function<void()>&& action, DWORD timeout)
+{
+    task<void> waitTask = RunOnUIThreadAsync([action]()
+    {
+        action();
+    });
+
+    WaitForTask<void>(waitTask, timeout);
+}
+
+void AsyncHelper::Delay(DWORD milliseconds)
+{
+    thread timer(bind(CalculatorApp::AsyncHelper::Sleep, milliseconds));
+    timer.join();
+}
+
+void AsyncHelper::Sleep(DWORD milliseconds)
+{
+    this_thread::sleep_for(chrono::milliseconds(milliseconds));
+}