/** * @file llthreadwatchdog.h * @brief The LLThreadWatchdog class declaration * * $LicenseInfo:firstyear=2007&license=viewergpl$ * * Copyright (c) 2007-2009, 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