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+/************************************************************************************
+
+Filename : Util_LongPollThread.cpp
+Content : Allows us to do all long polling tasks from a single thread to minimize deadlock risk
+Created : June 30, 2013
+Authors : 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.
+
+*************************************************************************************/
+
+#include "Util_LongPollThread.h"
+#include "Util_Watchdog.h"
+
+OVR_DEFINE_SINGLETON(OVR::Util::LongPollThread);
+
+namespace OVR { namespace Util {
+
+
+void LongPollThread::AddPollFunc(CallbackListener<PollFunc>* func)
+{
+ PollSubject.AddListener(func);
+}
+
+LongPollThread::LongPollThread() :
+ Terminated(false)
+{
+ Start();
+
+ // Must be at end of function
+ PushDestroyCallbacks();
+}
+
+LongPollThread::~LongPollThread()
+{
+ fireTermination();
+
+ Join();
+}
+
+void LongPollThread::OnThreadDestroy()
+{
+ fireTermination();
+}
+
+void LongPollThread::Wake()
+{
+ WakeEvent.SetEvent();
+}
+
+void LongPollThread::fireTermination()
+{
+ Terminated = true;
+ Wake();
+}
+
+void LongPollThread::OnSystemDestroy()
+{
+ Release();
+}
+
+int LongPollThread::Run()
+{
+ SetThreadName("LongPoll");
+ WatchDog watchdog("LongPoll");
+
+ // While not terminated,
+ do
+ {
+ watchdog.Feed(10000);
+
+ PollSubject.Call();
+
+ WakeEvent.Wait(WakeupInterval);
+ WakeEvent.ResetEvent();
+ } while (!Terminated);
+
+ return 0;
+}
+
+
+}} // namespace OVR::Util