michael@0: /* -*- Mode: C++; tab-width: 50; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef _LOADMONITOR_H_
michael@0: #define _LOADMONITOR_H_
michael@0: 
michael@0: #include "mozilla/Mutex.h"
michael@0: #include "mozilla/CondVar.h"
michael@0: #include "mozilla/RefPtr.h"
michael@0: #include "mozilla/Atomics.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsIThread.h"
michael@0: #include "nsIObserver.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: class LoadInfoUpdateRunner;
michael@0: class LoadInfoCollectRunner;
michael@0: 
michael@0: class LoadNotificationCallback
michael@0: {
michael@0: public:
michael@0:     virtual void LoadChanged(float aSystemLoad, float aProcessLoad) = 0;
michael@0: };
michael@0: 
michael@0: class LoadMonitor MOZ_FINAL : public nsIObserver
michael@0: {
michael@0: public:
michael@0:     NS_DECL_THREADSAFE_ISUPPORTS
michael@0:     NS_DECL_NSIOBSERVER
michael@0: 
michael@0:     LoadMonitor(int aLoadUpdateInterval);
michael@0:     ~LoadMonitor();
michael@0: 
michael@0:     nsresult Init(nsRefPtr<LoadMonitor> &self);
michael@0:     void SetLoadChangeCallback(LoadNotificationCallback* aCallback);
michael@0:     void Shutdown();
michael@0:     float GetSystemLoad();
michael@0:     float GetProcessLoad();
michael@0: 
michael@0:     friend class LoadInfoCollectRunner;
michael@0: 
michael@0: private:
michael@0: 
michael@0:     void SetProcessLoad(float load);
michael@0:     void SetSystemLoad(float load);
michael@0:     void FireCallbacks();
michael@0: 
michael@0:     int                  mLoadUpdateInterval;
michael@0:     mozilla::Mutex       mLock;
michael@0:     mozilla::CondVar     mCondVar;
michael@0:     bool                 mShutdownPending;
michael@0:     nsCOMPtr<nsIThread>  mLoadInfoThread;
michael@0:     float                mSystemLoad;
michael@0:     float                mProcessLoad;
michael@0:     LoadNotificationCallback* mLoadNotificationCallback;
michael@0: };
michael@0: 
michael@0: } //namespace
michael@0: 
michael@0: #endif /* _LOADMONITOR_H_ */