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+/************************************************************************************
+
+Filename    :   Util_Watchdog.h
+Content     :   Deadlock reaction
+Created     :   June 27, 2013
+Authors     :   Kevin Jenkins, Chris Taylor
+
+Copyright   :   Copyright 2014 Oculus VR, LLC All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License"); 
+you may not use the Oculus VR Rift SDK except in compliance with the License, 
+which is provided at the time of installation or download, or which 
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.2 
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#ifndef OVR_Util_Watchdog_h
+#define OVR_Util_Watchdog_h
+
+#include "Kernel/OVR_Timer.h"
+#include "Kernel/OVR_Atomic.h"
+#include "Kernel/OVR_Allocator.h"
+#include "Kernel/OVR_String.h"
+#include "Kernel/OVR_System.h"
+#include "Kernel/OVR_Threads.h"
+
+namespace OVR { namespace Util {
+
+
+//-----------------------------------------------------------------------------
+// WatchDog
+
+class WatchDog : public NewOverrideBase
+{
+    friend class WatchDogObserver;
+
+public:
+    WatchDog(const String& threadName);
+    ~WatchDog();
+
+    void Disable();
+    void Enable();
+
+    void Feed(int threshold);
+
+protected:
+	// Use 32 bit int so assignment and comparison is atomic
+	AtomicInt<uint32_t> WhenLastFedMilliseconds;
+    AtomicInt<int>      ThreshholdMilliseconds;
+
+    String              ThreadName;
+    bool                Listed;
+};
+
+
+//-----------------------------------------------------------------------------
+// WatchDogObserver
+
+class WatchDogObserver : public Thread, public SystemSingletonBase<WatchDogObserver>
+{
+    OVR_DECLARE_SINGLETON(WatchDogObserver);
+    virtual void OnThreadDestroy();
+
+    friend class WatchDog;
+
+public:
+    // Uses the exception logger to write deadlock reports
+    void EnableReporting(const String organization = String(),
+                         const String application = String());
+
+    // Disables deadlock reports
+    void DisableReporting();
+
+protected:
+    Lock ListLock;
+    Array< WatchDog* > DogList;
+
+    static const int WakeupInterval = 1000; // milliseconds between checks
+    Event TerminationEvent;
+
+    // Used in deadlock reporting.
+    bool IsReporting;
+
+    // On Windows, deadlock logs are stored in %AppData%\OrganizationName\ApplicationName\.
+    // See ExceptionHandler::ReportDeadlock() for how these are used.
+    String ApplicationName;
+    String OrganizationName;
+
+protected:
+    virtual int Run();
+
+    void Add(WatchDog* dog);
+    void Remove(WatchDog* dog);
+
+public:
+    static bool IsExitingOnDeadlock();
+    static void SetExitingOnDeadlock(bool enabled);
+};
+
+
+}} // namespace OVR::Util
+
+#endif // OVR_Util_Watchdog_h