102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
/**
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* @file llthreadwatchdog.h
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* @brief The LLThreadWatchdog class declaration
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*
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* $LicenseInfo:firstyear=2007&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_LLTHREADWATCHDOG_H
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#define LL_LLTHREADWATCHDOG_H
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#include <boost/function.hpp>
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#ifndef LL_TIMER_H
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#include "lltimer.h"
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#endif
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// LLWatchdogEntry is the interface used by the tasks that
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// need to be watched.
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class LLWatchdogEntry
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{
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public:
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LLWatchdogEntry();
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virtual ~LLWatchdogEntry();
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// isAlive is accessed by the watchdog thread.
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// This may mean that resources used by
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// isAlive and other method may need synchronization.
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virtual bool isAlive() const = 0;
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virtual void reset() = 0;
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virtual void start();
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virtual void stop();
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};
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class LLWatchdogTimeout : public LLWatchdogEntry
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{
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public:
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LLWatchdogTimeout();
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virtual ~LLWatchdogTimeout();
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bool isAlive() const override;
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void reset() override;
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void start() override { start(""); }
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void stop() override;
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void start(std::string_view state);
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void setTimeout(F32 d);
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void ping(std::string_view state);
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const std::string& getState() {return mPingState; }
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private:
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LLTimer mTimer;
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F32 mTimeout;
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std::string mPingState;
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};
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class LLWatchdogTimerThread; // Defined in the cpp
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class LLWatchdog : public LLSingleton<LLWatchdog>
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{
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LLSINGLETON(LLWatchdog);
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~LLWatchdog();
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public:
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// Add an entry to the watchdog.
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void add(LLWatchdogEntry* e);
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void remove(LLWatchdogEntry* e);
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void init();
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void run();
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void cleanup();
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private:
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void lockThread();
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void unlockThread();
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typedef std::set<LLWatchdogEntry*> SuspectsRegistry;
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SuspectsRegistry mSuspects;
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LLMutex* mSuspectsAccessMutex;
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LLWatchdogTimerThread* mTimer;
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U64 mLastClockCount;
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};
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#endif // LL_LLTHREADWATCHDOG_H
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