102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
/**
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* @file llthrottle.h
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* @brief LLThrottle class used for network bandwidth control
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*
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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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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_LLTHROTTLE_H
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#define LL_LLTHROTTLE_H
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#include "lltimer.h"
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const S32 MAX_THROTTLE_SIZE = 32;
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class LLDataPacker;
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// Single instance of a generic throttle
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class LLThrottle
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{
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public:
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LLThrottle(const F32 throttle = 1.f);
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~LLThrottle() { }
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void setRate(const F32 rate);
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BOOL checkOverflow(const F32 amount); // I'm about to add an amount, TRUE if would overflow throttle
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BOOL throttleOverflow(const F32 amount); // I just sent amount, TRUE if that overflowed the throttle
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F32 getAvailable(); // Return the available bits
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F32 getRate() const { return mRate; }
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private:
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F32 mLookaheadSecs; // Seconds to look ahead, maximum
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F32 mRate; // BPS available, dynamically adjusted
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F32 mAvailable; // Bits available to send right now on each channel
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F64 mLastSendTime; // Time since last send on this channel
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};
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typedef enum e_throttle_categories
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{
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TC_RESEND,
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TC_LAND,
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TC_WIND,
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TC_CLOUD,
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TC_TASK,
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TC_TEXTURE,
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TC_ASSET,
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TC_EOF
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} EThrottleCats;
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class LLThrottleGroup
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{
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public:
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LLThrottleGroup();
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~LLThrottleGroup() { }
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void resetDynamicAdjust();
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BOOL checkOverflow(S32 throttle_cat, F32 bits); // I'm about to send bits, TRUE if would overflow channel
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BOOL throttleOverflow(S32 throttle_cat, F32 bits); // I just sent bits, TRUE if that overflowed the channel
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BOOL dynamicAdjust(); // Shift bandwidth from idle channels to busy channels, TRUE if adjustment occurred
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BOOL setNominalBPS(F32* throttle_vec); // TRUE if any value was different, resets adjustment system if was different
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S32 getAvailable(S32 throttle_cat); // Return bits available in the channel
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void packThrottle(LLDataPacker &dp) const;
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void unpackThrottle(LLDataPacker &dp);
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public:
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F32 mThrottleTotal[TC_EOF]; // BPS available, sent by viewer, sum for all simulators
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protected:
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F32 mNominalBPS[TC_EOF]; // BPS available, adjusted to be just this simulator
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F32 mCurrentBPS[TC_EOF]; // BPS available, dynamically adjusted
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F32 mBitsAvailable[TC_EOF]; // Bits available to send right now on each channel
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F32 mBitsSentThisPeriod[TC_EOF]; // Sent in this dynamic allocation period
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F32 mBitsSentHistory[TC_EOF]; // Sent before this dynamic allocation period, adjusted to one period length
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F64 mLastSendTime[TC_EOF]; // Time since last send on this channel
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F64 mDynamicAdjustTime; // Only dynamic adjust every 2 seconds or so.
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};
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#endif
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