75 lines
2.6 KiB
C++
75 lines
2.6 KiB
C++
/**
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* @file llheartbeat.h
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* @brief Class encapsulating logic for telling a watchdog that we live.
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*
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* $LicenseInfo:firstyear=2008&license=viewergpl$
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*
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* Copyright (c) 2008-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLHEARTBEAT_H
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#define LL_LLHEARTBEAT_H
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#include "linden_common.h"
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#include "lltimer.h"
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// Note: Win32 does not support the heartbeat/smackdown system;
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// heartbeat-delivery turns into a no-op there.
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class LL_COMMON_API LLHeartbeat
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{
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public:
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// secs_between_heartbeat: after a heartbeat is successfully delivered,
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// we suppress sending more for this length of time.
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// aggressive_heartbeat_panic_secs: if we've been failing to
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// successfully deliver heartbeats for this length of time then
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// we block for a while until we're really sure we got one delivered.
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// aggressive_heartbeat_max_blocking_secs: this is the length of
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// time we block for when we're aggressively ensuring that a 'panic'
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// heartbeat was delivered.
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LLHeartbeat(F32 secs_between_heartbeat = 5.0f,
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F32 aggressive_heartbeat_panic_secs = 10.0f,
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F32 aggressive_heartbeat_max_blocking_secs = 4.0f);
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~LLHeartbeat();
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bool send(F32 timeout_sec = 0.0f);
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void setSuppressed(bool is_suppressed);
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private:
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int rawSend();
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int rawSendWithTimeout(F32 timeout_sec);
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F32 mSecsBetweenHeartbeat;
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F32 mAggressiveHeartbeatPanicSecs;
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F32 mAggressiveHeartbeatMaxBlockingSecs;
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bool mSuppressed;
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LLTimer mBeatTimer;
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LLTimer mPanicTimer;
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LLTimer mTimeoutTimer;
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};
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#endif // LL_HEARTBEAT_H
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