From 2a4dea528f670b9bb1f77ef27a8a1dd16603d114 Mon Sep 17 00:00:00 2001
From: Jacek Antonelli
Date: Fri, 15 Aug 2008 23:45:50 -0500
Subject: Second Life viewer sources 1.20.7

---
 linden/indra/llcommon/llheartbeat.h | 73 +++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 linden/indra/llcommon/llheartbeat.h

(limited to 'linden/indra/llcommon/llheartbeat.h')

diff --git a/linden/indra/llcommon/llheartbeat.h b/linden/indra/llcommon/llheartbeat.h
new file mode 100644
index 0000000..8a2fa0a
--- /dev/null
+++ b/linden/indra/llcommon/llheartbeat.h
@@ -0,0 +1,73 @@
+/** 
+ * @file llheartbeat.h
+ * @brief Class encapsulating logic for telling a watchdog that we live.
+ *
+ * $LicenseInfo:firstyear=2008&license=viewergpl$
+ * 
+ * Copyright (c) 2008, 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 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
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