1 files changed, 76 insertions, 0 deletions
diff --git a/xbmc/peripherals/EventScanner.h b/xbmc/peripherals/EventScanner.h
new file mode 100644
index 0000000..0092278
--- /dev/null
+++ b/xbmc/peripherals/EventScanner.h
@@ -0,0 +1,76 @@
+/*
+ *  Copyright (C) 2016-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include "EventLockHandle.h"
+#include "EventPollHandle.h"
+#include "PeripheralTypes.h"
+#include "threads/CriticalSection.h"
+#include "threads/Event.h"
+#include "threads/Thread.h"
+
+#include <chrono>
+#include <set>
+
+namespace PERIPHERALS
+{
+class IEventScannerCallback;
+
+/*!
+ * \brief Class to scan for peripheral events
+ *
+ * By default, a rate of 60 Hz is used. A client can obtain control over when
+ * input is handled by registering for a polling handle.
+ */
+class CEventScanner : public IEventPollCallback, public IEventLockCallback, protected CThread
+{
+public:
+  explicit CEventScanner(IEventScannerCallback& callback);
+
+  ~CEventScanner() override = default;
+
+  void Start();
+  void Stop();
+
+  EventPollHandlePtr RegisterPollHandle();
+
+  /*!
+   * \brief Acquire a lock that prevents event processing while held
+   */
+  EventLockHandlePtr RegisterLock();
+
+  // implementation of IEventPollCallback
+  void Activate(CEventPollHandle& handle) override;
+  void Deactivate(CEventPollHandle& handle) override;
+  void HandleEvents(bool bWait) override;
+  void Release(CEventPollHandle& handle) override;
+
+  // implementation of IEventLockCallback
+  void ReleaseLock(CEventLockHandle& handle) override;
+
+protected:
+  // implementation of CThread
+  void Process() override;
+
+private:
+  std::chrono::milliseconds GetScanIntervalMs() const;
+
+  // Construction parameters
+  IEventScannerCallback& m_callback;
+
+  // Event parameters
+  std::set<void*> m_activeHandles;
+  std::set<void*> m_activeLocks;
+  CEvent m_scanEvent;
+  CEvent m_scanFinishedEvent;
+  mutable CCriticalSection m_handleMutex;
+  CCriticalSection m_lockMutex;
+  CCriticalSection m_pollMutex; // Prevent two poll handles from polling at once
+};
+} // namespace PERIPHERALS