From 38d6d37f2d982fa959e9e8a4a3f7e1ccfad7b5d4 Mon Sep 17 00:00:00 2001
From: Jacek Antonelli
Date: Fri, 15 Aug 2008 23:44:46 -0500
Subject: Second Life viewer sources 1.13.2.12

---
 linden/indra/llcommon/llframetimer.cpp | 88 ++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 linden/indra/llcommon/llframetimer.cpp

(limited to 'linden/indra/llcommon/llframetimer.cpp')

diff --git a/linden/indra/llcommon/llframetimer.cpp b/linden/indra/llcommon/llframetimer.cpp
new file mode 100644
index 0000000..d41f904
--- /dev/null
+++ b/linden/indra/llcommon/llframetimer.cpp
@@ -0,0 +1,88 @@
+/** 
+ * @file llframetimer.cpp
+ *
+ * Copyright (c) 2002-2007, Linden Research, Inc.
+ * 
+ * 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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.
+ */
+
+#include "linden_common.h"
+
+#include "u64.h"
+
+#include "llframetimer.h"
+
+// Static members
+//LLTimer	LLFrameTimer::sInternalTimer;
+U64 LLFrameTimer::sStartTotalTime = totalTime();
+F64 LLFrameTimer::sFrameTime = 0.0;
+U64 LLFrameTimer::sTotalTime = 0;
+F64 LLFrameTimer::sTotalSeconds = 0.0;
+S32 LLFrameTimer::sFrameCount = 0;
+U64 LLFrameTimer::sFrameDeltaTime = 0;
+const F64 USEC_PER_SECOND = 1000000.0;
+const F64 USEC_TO_SEC_F64 = 0.000001;
+
+// static
+void LLFrameTimer::updateFrameTime()
+{
+	U64 total_time = totalTime();
+	sFrameDeltaTime = total_time - sTotalTime;
+	sTotalTime = total_time;
+	sTotalSeconds = U64_to_F64(sTotalTime) * USEC_TO_SEC_F64;
+	sFrameTime = U64_to_F64(sTotalTime - sStartTotalTime) * USEC_TO_SEC_F64;
+	sFrameCount++;
+} 
+
+void LLFrameTimer::setExpiryAt(F64 seconds_since_epoch)
+{
+	mStartTime = sFrameTime;
+	mExpiry = seconds_since_epoch - (USEC_TO_SEC_F64 * sStartTotalTime);
+}
+
+F64 LLFrameTimer::expiresAt() const
+{
+	F64 expires_at = U64_to_F64(sStartTotalTime) * USEC_TO_SEC_F64;
+	expires_at += mExpiry;
+	return expires_at;
+}
+
+BOOL LLFrameTimer::checkExpirationAndReset(F32 expiration)
+{
+	//llinfos << "LLFrameTimer::checkExpirationAndReset()" << llendl;
+	//llinfos << "  mStartTime:" << mStartTime << llendl;
+	//llinfos << "  sFrameTime:" << sFrameTime << llendl;
+	//llinfos << "  mExpiry:   " <<  mExpiry << llendl;
+
+	if(hasExpired())
+	{
+		reset();
+		setTimerExpirySec(expiration);
+		return TRUE;
+	}
+	return FALSE;
+}
+
+// static
+F32 LLFrameTimer::getFrameDeltaTimeF32()
+{
+	return (F32)(U64_to_F64(sFrameDeltaTime) * USEC_TO_SEC_F64); 
+}
-- 
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