llwatchdog.h
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- /**
- * @file llthreadwatchdog.h
- * @brief The LLThreadWatchdog class declaration
- *
- * $LicenseInfo:firstyear=2007&license=viewergpl$
- *
- * Copyright (c) 2007-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LL_LLTHREADWATCHDOG_H
- #define LL_LLTHREADWATCHDOG_H
- #include <boost/function.hpp>
- #ifndef LL_TIMER_H
- #include "lltimer.h"
- #endif
- // LLWatchdogEntry is the interface used by the tasks that
- // need to be watched.
- class LLWatchdogEntry
- {
- public:
- LLWatchdogEntry();
- virtual ~LLWatchdogEntry();
- // isAlive is accessed by the watchdog thread.
- // This may mean that resources used by
- // isAlive and other method may need synchronization.
- virtual bool isAlive() const = 0;
- virtual void reset() = 0;
- virtual void start();
- virtual void stop();
- };
- class LLWatchdogTimeout : public LLWatchdogEntry
- {
- public:
- LLWatchdogTimeout();
- virtual ~LLWatchdogTimeout();
- /* virtual */ bool isAlive() const;
- /* virtual */ void reset();
- /* virtual */ void start() { start(""); }
- /* virtual */ void stop();
- void start(const std::string& state);
- void setTimeout(F32 d);
- void ping(const std::string& state);
- const std::string& getState() {return mPingState; }
- private:
- LLTimer mTimer;
- F32 mTimeout;
- std::string mPingState;
- };
- class LLWatchdogTimerThread; // Defined in the cpp
- class LLWatchdog : public LLSingleton<LLWatchdog>
- {
- public:
- LLWatchdog();
- ~LLWatchdog();
- // Add an entry to the watchdog.
- void add(LLWatchdogEntry* e);
- void remove(LLWatchdogEntry* e);
- typedef boost::function<void (void)> killer_event_callback;
- void init(killer_event_callback func = NULL);
- void run();
- void cleanup();
-
- private:
- void lockThread();
- void unlockThread();
- typedef std::set<LLWatchdogEntry*> SuspectsRegistry;
- SuspectsRegistry mSuspects;
- LLMutex* mSuspectsAccessMutex;
- LLWatchdogTimerThread* mTimer;
- U64 mLastClockCount;
- killer_event_callback mKillerCallback;
- };
- #endif // LL_LLTHREADWATCHDOG_H