FancyZones and Shortcut Guide initial commit

Co-authored-by: Alexis Campailla <alexis@janeasystems.com>
Co-authored-by: Bret Anderson <bretan@microsoft.com>
Co-authored-by: Enrico Giordani <enrico.giordani@gmail.com>
Co-authored-by: Jaime Bernardo <jaime@janeasystems.com>
Co-authored-by: Jeff Bogdan <jeffbog@microsoft.com>
Co-authored-by: March Rogers <marchr@microsoft.com>
Co-authored-by: Mike Harsh <mharsh@microsoft.com>
Co-authored-by: Nachum Bundak <Nachum.Bundak@microsoft.com>
Co-authored-by: Oliver Jones <ojones@microsoft.com>
Co-authored-by: Patrick Little <plittle@microsoft.com>

src/common/async_message_queue.h

@@ -0,0 +1,47 @@
+#pragma once
+#include <queue>
+#include <thread>
+#include <mutex>
+#include <condition_variable>
+#include <string>
+
+class AsyncMessageQueue {
+private:
+  std::mutex queue_mutex;
+  std::queue<std::wstring> message_queue;
+  std::condition_variable message_ready;
+  bool interrupted = false;
+
+  //Disable copy
+  AsyncMessageQueue(const AsyncMessageQueue&);
+  AsyncMessageQueue& operator=(const AsyncMessageQueue&);
+
+public:
+  AsyncMessageQueue() {
+  }
+  void queue_message(std::wstring message) {
+    this->queue_mutex.lock();
+    this->message_queue.push(message);
+    this->queue_mutex.unlock();
+    this->message_ready.notify_one();
+  }
+  std::wstring pop_message() {
+    std::unique_lock<std::mutex> lock(this->queue_mutex);
+    while (message_queue.empty() && !this->interrupted) {
+      this->message_ready.wait(lock);
+    }
+    if (this->interrupted) {
+      //Just returns a empty string if the queue was interrupted.
+      return std::wstring(L"");
+    }
+    std::wstring message = this->message_queue.front();
+    this->message_queue.pop();
+    return message;
+  }
+  void interrupt() {
+    this->queue_mutex.lock();
+    this->interrupted = true;
+    this->queue_mutex.unlock();
+    this->message_ready.notify_all();
+  }
+};