llheartbeat.h
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- /**
- * @file llheartbeat.h
- * @brief Class encapsulating logic for telling a watchdog that we live.
- *
- * $LicenseInfo:firstyear=2008&license=viewergpl$
- *
- * Copyright (c) 2008-2010, 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_LLHEARTBEAT_H
- #define LL_LLHEARTBEAT_H
- #include "linden_common.h"
- #include "lltimer.h"
- // Note: Win32 does not support the heartbeat/smackdown system;
- // heartbeat-delivery turns into a no-op there.
- class LL_COMMON_API LLHeartbeat
- {
- public:
- // secs_between_heartbeat: after a heartbeat is successfully delivered,
- // we suppress sending more for this length of time.
- // aggressive_heartbeat_panic_secs: if we've been failing to
- // successfully deliver heartbeats for this length of time then
- // we block for a while until we're really sure we got one delivered.
- // aggressive_heartbeat_max_blocking_secs: this is the length of
- // time we block for when we're aggressively ensuring that a 'panic'
- // heartbeat was delivered.
- LLHeartbeat(F32 secs_between_heartbeat = 5.0f,
- F32 aggressive_heartbeat_panic_secs = 10.0f,
- F32 aggressive_heartbeat_max_blocking_secs = 4.0f);
- ~LLHeartbeat();
- bool send(F32 timeout_sec = 0.0f);
- void setSuppressed(bool is_suppressed);
- private:
- int rawSend();
- int rawSendWithTimeout(F32 timeout_sec);
- F32 mSecsBetweenHeartbeat;
- F32 mAggressiveHeartbeatPanicSecs;
- F32 mAggressiveHeartbeatMaxBlockingSecs;
- bool mSuppressed;
- LLTimer mBeatTimer;
- LLTimer mPanicTimer;
- LLTimer mTimeoutTimer;
- };
- #endif // LL_HEARTBEAT_H