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FlippR-Driver/src/input/InputEventNotifier.cpp

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+/*
+ * InputEventNotifier.cpp
+ *
+ *  Created on: May 17, 2018
+ *      Author: Andreas Schneider, Johannes Wendel, Jonas Zeunert, Rafael Vinci, Dr. Franca Rupprecht
+ */
+
+#include "InputEventNotifier.h"
+
+namespace Input
+{
+
+InputEventNotifier::InputEventNotifier()
+: is_running(true)
+{
+  notify_thread = std::thread(&InputEventNotifier::notify, this);
+}
+
+InputEventNotifier::~InputEventNotifier()
+{
+  is_running = false;
+
+  notify_thread.join();
+}
+
+void InputEventNotifier::register_input_event_handler(InputEventHandler* handler)
+{
+  std::lock_guard<std::mutex> event_handler_guard(event_handler_mutex);
+  event_handler.insert(handler);
+}
+
+void InputEventNotifier::unregister_input_event_handler(InputEventHandler* handler)
+{
+  std::lock_guard<std::mutex> event_handler_guard(event_handler_mutex);
+  event_handler.erase(handler);
+}
+
+void InputEventNotifier::distribute_event(InputEvent& event)
+{
+  event_queue.push(event);
+}
+
+void InputEventNotifier::notify()
+{
+  while(is_running)
+  {
+    InputEvent event = event_queue.pop();
+
+    // getting a guard and calling all registered handlers
+    std::lock_guard<std::mutex> event_handler_guard(event_handler_mutex);
+    for(auto handler : event_handler)
+    {
+      // todo timeout!
+      handler->handle(event);
+    }
+  }
+}
+
+}