120 lines
2.6 KiB
C++
120 lines
2.6 KiB
C++
/**
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* @file llframetimer.cpp
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*
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* Copyright (c) 2002-$CurrentYear$, Linden Research, Inc.
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* $License$
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*/
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#include "linden_common.h"
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#include "u64.h"
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#include "llframetimer.h"
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// Static members
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//LLTimer LLFrameTimer::sInternalTimer;
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U64 LLFrameTimer::sStartTotalTime = totalTime();
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F64 LLFrameTimer::sFrameTime = 0.0;
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U64 LLFrameTimer::sTotalTime = 0;
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F64 LLFrameTimer::sTotalSeconds = 0.0;
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S32 LLFrameTimer::sFrameCount = 0;
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U64 LLFrameTimer::sFrameDeltaTime = 0;
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const F64 USEC_PER_SECOND = 1000000.0;
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const F64 USEC_TO_SEC_F64 = 0.000001;
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// static
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void LLFrameTimer::updateFrameTime()
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{
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U64 total_time = totalTime();
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sFrameDeltaTime = total_time - sTotalTime;
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sTotalTime = total_time;
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sTotalSeconds = U64_to_F64(sTotalTime) * USEC_TO_SEC_F64;
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sFrameTime = U64_to_F64(sTotalTime - sStartTotalTime) * USEC_TO_SEC_F64;
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sFrameCount++;
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}
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void LLFrameTimer::start()
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{
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reset();
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mStarted = TRUE;
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}
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void LLFrameTimer::stop()
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{
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mStarted = FALSE;
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}
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void LLFrameTimer::reset()
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{
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mStartTime = sFrameTime;
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mExpiry = sFrameTime;
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}
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void LLFrameTimer::resetWithExpiry(F32 expiration)
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{
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reset();
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setTimerExpirySec(expiration);
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}
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// Don't combine pause/unpause with start/stop
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// Useage:
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// LLFrameTime foo; // starts automatically
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// foo.unpause(); // noop but safe
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// foo.pause(); // pauses timer
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// foo.unpause() // unpauses
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// F32 elapsed = foo.getElapsedTimeF32() // does not include time between pause() and unpause()
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// Note: elapsed would also be valid with no unpause() call (= time run until pause() called)
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void LLFrameTimer::pause()
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{
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if (mStarted)
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mStartTime = sFrameTime - mStartTime; // save dtime
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mStarted = FALSE;
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}
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void LLFrameTimer::unpause()
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{
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if (!mStarted)
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mStartTime = sFrameTime - mStartTime; // restore dtime
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mStarted = TRUE;
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}
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void LLFrameTimer::setTimerExpirySec(F32 expiration)
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{
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mExpiry = expiration + mStartTime;
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}
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void LLFrameTimer::setExpiryAt(F64 seconds_since_epoch)
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{
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mStartTime = sFrameTime;
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mExpiry = seconds_since_epoch - (USEC_TO_SEC_F64 * sStartTotalTime);
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}
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F64 LLFrameTimer::expiresAt() const
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{
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F64 expires_at = U64_to_F64(sStartTotalTime) * USEC_TO_SEC_F64;
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expires_at += mExpiry;
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return expires_at;
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}
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BOOL LLFrameTimer::checkExpirationAndReset(F32 expiration)
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{
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//llinfos << "LLFrameTimer::checkExpirationAndReset()" << llendl;
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//llinfos << " mStartTime:" << mStartTime << llendl;
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//llinfos << " sFrameTime:" << sFrameTime << llendl;
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//llinfos << " mExpiry: " << mExpiry << llendl;
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if(hasExpired())
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{
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reset();
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setTimerExpirySec(expiration);
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return TRUE;
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}
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return FALSE;
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}
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// static
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F32 LLFrameTimer::getFrameDeltaTimeF32()
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{
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return (F32)(U64_to_F64(sFrameDeltaTime) * USEC_TO_SEC_F64);
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}
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