/** * @file lltracesampler.cpp * * $LicenseInfo:firstyear=2001&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2012, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #include "linden_common.h" #include "lltrace.h" #include "llfasttimer.h" #include "lltracerecording.h" #include "lltracethreadrecorder.h" #include "llthread.h" namespace LLTrace { /////////////////////////////////////////////////////////////////////// // Recording /////////////////////////////////////////////////////////////////////// Recording::Recording(EPlayState state) : mElapsedSeconds(0), mInHandOff(false) { mBuffers = new AccumulatorBufferGroup(); setPlayState(state); } Recording::Recording( const Recording& other ) { *this = other; } Recording& Recording::operator = (const Recording& other) { // this will allow us to seamlessly start without affecting any data we've acquired from other setPlayState(PAUSED); const_cast(other).update(); EPlayState other_play_state = other.getPlayState(); mBuffers = other.mBuffers; // above call will clear mElapsedSeconds as a side effect, so copy it here mElapsedSeconds = other.mElapsedSeconds; mSamplingTimer = other.mSamplingTimer; setPlayState(other_play_state); return *this; } Recording::~Recording() { if (isStarted() && LLTrace::get_thread_recorder().notNull()) { LLTrace::get_thread_recorder()->deactivate(mBuffers.write()); } } void Recording::update() { if (isStarted()) { mElapsedSeconds += mSamplingTimer.getElapsedTimeF64(); AccumulatorBufferGroup* buffers = mBuffers.write(); LLTrace::get_thread_recorder()->bringUpToDate(buffers); mSamplingTimer.reset(); } } void Recording::handleReset() { mBuffers.write()->reset(); mElapsedSeconds = F64Seconds(0.0); mSamplingTimer.reset(); } void Recording::handleStart() { mSamplingTimer.reset(); mBuffers.setStayUnique(true); LLTrace::get_thread_recorder()->activate(mBuffers.write(), mInHandOff); mInHandOff = false; } void Recording::handleStop() { mElapsedSeconds += mSamplingTimer.getElapsedTimeF64(); LLTrace::get_thread_recorder()->deactivate(mBuffers.write()); mBuffers.setStayUnique(false); } void Recording::handleSplitTo(Recording& other) { other.mInHandOff = true; mBuffers.write()->handOffTo(*other.mBuffers.write()); } void Recording::appendRecording( Recording& other ) { update(); other.update(); mBuffers.write()->append(*other.mBuffers); mElapsedSeconds += other.mElapsedSeconds; } F64Seconds Recording::getSum(const TraceType& stat) { const TimeBlockAccumulator& accumulator = mBuffers->mStackTimers[stat.getIndex()]; return F64Seconds((F64)(accumulator.mTotalTimeCounter - accumulator.mStartTotalTimeCounter) / (F64)LLTrace::TimeBlock::countsPerSecond()); } F64Seconds Recording::getSum(const TraceType& stat) { const TimeBlockAccumulator& accumulator = mBuffers->mStackTimers[stat.getIndex()]; return F64Seconds((F64)(accumulator.mSelfTimeCounter) / (F64)LLTrace::TimeBlock::countsPerSecond()); } U32 Recording::getSum(const TraceType& stat) { return mBuffers->mStackTimers[stat.getIndex()].mCalls; } F64Seconds Recording::getPerSec(const TraceType& stat) { const TimeBlockAccumulator& accumulator = mBuffers->mStackTimers[stat.getIndex()]; return F64Seconds((F64)(accumulator.mTotalTimeCounter - accumulator.mStartTotalTimeCounter) / ((F64)LLTrace::TimeBlock::countsPerSecond() * mElapsedSeconds.value())); } F64Seconds Recording::getPerSec(const TraceType& stat) { const TimeBlockAccumulator& accumulator = mBuffers->mStackTimers[stat.getIndex()]; return F64Seconds((F64)(accumulator.mSelfTimeCounter) / ((F64)LLTrace::TimeBlock::countsPerSecond() * mElapsedSeconds.value())); } F32 Recording::getPerSec(const TraceType& stat) { return (F32)mBuffers->mStackTimers[stat.getIndex()].mCalls / mElapsedSeconds.value(); } bool Recording::hasValue(const TraceType& stat) { return mBuffers->mMemStats[stat.getIndex()].mSize.hasValue(); } bool Recording::hasValue(const TraceType& stat) { return mBuffers->mMemStats[stat.getIndex()].mShadowSize.hasValue(); } F64Bytes Recording::getMin(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mSize.getMin()); } F64Bytes Recording::getMean(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mSize.getMean()); } F64Bytes Recording::getMax(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mSize.getMax()); } F64Bytes Recording::getStandardDeviation(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mSize.getStandardDeviation()); } F64Bytes Recording::getLastValue(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mSize.getLastValue()); } F64Bytes Recording::getMin(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mShadowSize.getMin()); } F64Bytes Recording::getMean(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mShadowSize.getMean()); } F64Bytes Recording::getMax(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mShadowSize.getMax()); } F64Bytes Recording::getStandardDeviation(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mShadowSize.getStandardDeviation()); } F64Bytes Recording::getLastValue(const TraceType& stat) { return F64Bytes(mBuffers->mMemStats[stat.getIndex()].mShadowSize.getLastValue()); } U32 Recording::getSum(const TraceType& stat) { return mBuffers->mMemStats[stat.getIndex()].mAllocatedCount; } U32 Recording::getSum(const TraceType& stat) { return mBuffers->mMemStats[stat.getIndex()].mAllocatedCount; } F64 Recording::getSum( const TraceType& stat ) { return mBuffers->mCounts[stat.getIndex()].getSum(); } F64 Recording::getSum( const TraceType& stat ) { return (F64)mBuffers->mEvents[stat.getIndex()].getSum(); } F64 Recording::getPerSec( const TraceType& stat ) { F64 sum = mBuffers->mCounts[stat.getIndex()].getSum(); return sum / mElapsedSeconds.value(); } U32 Recording::getSampleCount( const TraceType& stat ) { return mBuffers->mCounts[stat.getIndex()].getSampleCount(); } bool Recording::hasValue(const TraceType& stat) { return mBuffers->mSamples[stat.getIndex()].hasValue(); } F64 Recording::getMin( const TraceType& stat ) { return mBuffers->mSamples[stat.getIndex()].getMin(); } F64 Recording::getMax( const TraceType& stat ) { return mBuffers->mSamples[stat.getIndex()].getMax(); } F64 Recording::getMean( const TraceType& stat ) { return mBuffers->mSamples[stat.getIndex()].getMean(); } F64 Recording::getStandardDeviation( const TraceType& stat ) { return mBuffers->mSamples[stat.getIndex()].getStandardDeviation(); } F64 Recording::getLastValue( const TraceType& stat ) { return mBuffers->mSamples[stat.getIndex()].getLastValue(); } U32 Recording::getSampleCount( const TraceType& stat ) { return mBuffers->mSamples[stat.getIndex()].getSampleCount(); } bool Recording::hasValue(const TraceType& stat) { return mBuffers->mEvents[stat.getIndex()].hasValue(); } F64 Recording::getMin( const TraceType& stat ) { return mBuffers->mEvents[stat.getIndex()].getMin(); } F64 Recording::getMax( const TraceType& stat ) { return mBuffers->mEvents[stat.getIndex()].getMax(); } F64 Recording::getMean( const TraceType& stat ) { return mBuffers->mEvents[stat.getIndex()].getMean(); } F64 Recording::getStandardDeviation( const TraceType& stat ) { return mBuffers->mEvents[stat.getIndex()].getStandardDeviation(); } F64 Recording::getLastValue( const TraceType& stat ) { return mBuffers->mEvents[stat.getIndex()].getLastValue(); } U32 Recording::getSampleCount( const TraceType& stat ) { return mBuffers->mEvents[stat.getIndex()].getSampleCount(); } /////////////////////////////////////////////////////////////////////// // PeriodicRecording /////////////////////////////////////////////////////////////////////// PeriodicRecording::PeriodicRecording( U32 num_periods, EPlayState state) : mAutoResize(num_periods == 0), mCurPeriod(0), mNumPeriods(0), mRecordingPeriods(num_periods ? num_periods : 1) { setPlayState(state); } void PeriodicRecording::nextPeriod() { if (mAutoResize) { mRecordingPeriods.push_back(Recording()); } Recording& old_recording = getCurRecording(); mCurPeriod = (mCurPeriod + 1) % mRecordingPeriods.size(); old_recording.splitTo(getCurRecording()); mNumPeriods = llmin(mRecordingPeriods.size(), mNumPeriods + 1); } void PeriodicRecording::appendRecording(Recording& recording) { getCurRecording().appendRecording(recording); nextPeriod(); } void PeriodicRecording::appendPeriodicRecording( PeriodicRecording& other ) { if (other.mRecordingPeriods.empty()) return; getCurRecording().update(); other.getCurRecording().update(); const U32 other_recording_slots = other.mRecordingPeriods.size(); const U32 other_num_recordings = other.getNumRecordedPeriods(); const U32 other_current_recording_index = other.mCurPeriod; const U32 other_oldest_recording_index = (other_current_recording_index + other_recording_slots - other_num_recordings + 1) % other_recording_slots; // append first recording into our current slot getCurRecording().appendRecording(other.mRecordingPeriods[other_oldest_recording_index]); // from now on, add new recordings for everything after the first U32 other_index = (other_oldest_recording_index + 1) % other_recording_slots; if (mAutoResize) { // push back recordings for everything in the middle U32 other_index = (other_oldest_recording_index + 1) % other_recording_slots; while (other_index != other_current_recording_index) { mRecordingPeriods.push_back(other.mRecordingPeriods[other_index]); other_index = (other_index + 1) % other_recording_slots; } // add final recording, if it wasn't already added as the first if (other_num_recordings > 1) { mRecordingPeriods.push_back(other.mRecordingPeriods[other_current_recording_index]); } mCurPeriod = mRecordingPeriods.size() - 1; mNumPeriods = mRecordingPeriods.size(); } else { size_t num_to_copy = llmin( mRecordingPeriods.size(), (size_t)other_num_recordings); std::vector::iterator src_it = other.mRecordingPeriods.begin() + other_index ; std::vector::iterator dest_it = mRecordingPeriods.begin() + mCurPeriod; // already consumed the first recording from other, so start counting at 1 for(size_t i = 1; i < num_to_copy; i++) { *dest_it = *src_it; if (++src_it == other.mRecordingPeriods.end()) { src_it = other.mRecordingPeriods.begin(); } if (++dest_it == mRecordingPeriods.end()) { dest_it = mRecordingPeriods.begin(); } } // want argument to % to be positive, otherwise result could be negative and thus out of bounds llassert(num_to_copy >= 1); // advance to last recording period copied, and make that our current period mCurPeriod = (mCurPeriod + num_to_copy - 1) % mRecordingPeriods.size(); mNumPeriods = llmin(mRecordingPeriods.size(), mNumPeriods + num_to_copy - 1); } // end with fresh period, otherwise next appendPeriodicRecording() will merge the first // recording period with the last one appended here nextPeriod(); getCurRecording().setPlayState(getPlayState()); } F64Seconds PeriodicRecording::getDuration() const { F64Seconds duration; size_t num_periods = mRecordingPeriods.size(); for (size_t i = 1; i <= num_periods; i++) { size_t index = (mCurPeriod + num_periods - i) % num_periods; duration += mRecordingPeriods[index].getDuration(); } return duration; } LLTrace::Recording PeriodicRecording::snapshotCurRecording() const { Recording recording_copy(getCurRecording()); recording_copy.stop(); return recording_copy; } Recording& PeriodicRecording::getLastRecording() { return getPrevRecording(1); } const Recording& PeriodicRecording::getLastRecording() const { return getPrevRecording(1); } Recording& PeriodicRecording::getCurRecording() { return mRecordingPeriods[mCurPeriod]; } const Recording& PeriodicRecording::getCurRecording() const { return mRecordingPeriods[mCurPeriod]; } Recording& PeriodicRecording::getPrevRecording( U32 offset ) { U32 num_periods = mRecordingPeriods.size(); offset = llclamp(offset, 0u, num_periods - 1); return mRecordingPeriods[(mCurPeriod + num_periods - offset) % num_periods]; } const Recording& PeriodicRecording::getPrevRecording( U32 offset ) const { U32 num_periods = mRecordingPeriods.size(); offset = llclamp(offset, 0u, num_periods - 1); return mRecordingPeriods[(mCurPeriod + num_periods - offset) % num_periods]; } void PeriodicRecording::handleStart() { getCurRecording().start(); } void PeriodicRecording::handleStop() { getCurRecording().pause(); } void PeriodicRecording::handleReset() { getCurRecording().stop(); if (mAutoResize) { mRecordingPeriods.clear(); mRecordingPeriods.push_back(Recording()); } else { for (std::vector::iterator it = mRecordingPeriods.begin(), end_it = mRecordingPeriods.end(); it != end_it; ++it) { it->reset(); } } mCurPeriod = 0; mNumPeriods = 0; getCurRecording().setPlayState(getPlayState()); } void PeriodicRecording::handleSplitTo(PeriodicRecording& other) { getCurRecording().splitTo(other.getCurRecording()); } F64 PeriodicRecording::getPeriodMin( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); bool has_value = false; F64 min_val = std::numeric_limits::max(); for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); if (recording.hasValue(stat)) { min_val = llmin(min_val, recording.getMin(stat)); has_value = true; } } return has_value ? min_val : NaN; } F64 PeriodicRecording::getPeriodMax( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); bool has_value = false; F64 max_val = std::numeric_limits::min(); for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); if (recording.hasValue(stat)) { max_val = llmax(max_val, recording.getMax(stat)); has_value = true; } } return has_value ? max_val : NaN; } // calculates means using aggregates per period F64 PeriodicRecording::getPeriodMean( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); F64 mean = 0; S32 valid_period_count = 0; for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); if (recording.hasValue(stat)) { mean += recording.getMean(stat); valid_period_count++; } } return valid_period_count ? mean / (F64)valid_period_count : NaN; } F64 PeriodicRecording::getPeriodStandardDeviation( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); F64 period_mean = getPeriodMean(stat, num_periods); F64 sum_of_squares = 0; S32 valid_period_count = 0; for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); if (recording.hasValue(stat)) { F64 delta = recording.getMean(stat) - period_mean; sum_of_squares += delta * delta; valid_period_count++; } } return valid_period_count ? sqrt((F64)sum_of_squares / (F64)valid_period_count) : NaN; } F64 PeriodicRecording::getPeriodMin( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); bool has_value = false; F64 min_val = std::numeric_limits::max(); for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); if (recording.hasValue(stat)) { min_val = llmin(min_val, recording.getMin(stat)); has_value = true; } } return has_value ? min_val : NaN; } F64 PeriodicRecording::getPeriodMax(const TraceType& stat, size_t num_periods /*= U32_MAX*/) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); bool has_value = false; F64 max_val = std::numeric_limits::min(); for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); if (recording.hasValue(stat)) { max_val = llmax(max_val, recording.getMax(stat)); has_value = true; } } return has_value ? max_val : NaN; } F64 PeriodicRecording::getPeriodMean( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); S32 valid_period_count = 0; F64 mean = 0; for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); if (recording.hasValue(stat)) { mean += recording.getMean(stat); valid_period_count++; } } return valid_period_count ? mean / F64(valid_period_count) : NaN; } F64 PeriodicRecording::getPeriodStandardDeviation( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); F64 period_mean = getPeriodMean(stat, num_periods); S32 valid_period_count = 0; F64 sum_of_squares = 0; for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); if (recording.hasValue(stat)) { F64 delta = recording.getMean(stat) - period_mean; sum_of_squares += delta * delta; valid_period_count++; } } return valid_period_count ? sqrt(sum_of_squares / (F64)valid_period_count) : NaN; } F64Bytes PeriodicRecording::getPeriodMin( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); F64Bytes min_val(std::numeric_limits::max()); for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); min_val = llmin(min_val, recording.getMin(stat)); } return min_val; } F64Bytes PeriodicRecording::getPeriodMin(const MemStatHandle& stat, size_t num_periods) { return getPeriodMin(static_cast&>(stat), num_periods); } F64Bytes PeriodicRecording::getPeriodMax(const TraceType& stat, size_t num_periods /*= U32_MAX*/) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); F64Bytes max_val(0.0); for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); max_val = llmax(max_val, recording.getMax(stat)); } return max_val; } F64Bytes PeriodicRecording::getPeriodMax(const MemStatHandle& stat, size_t num_periods) { return getPeriodMax(static_cast&>(stat), num_periods); } F64Bytes PeriodicRecording::getPeriodMean( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); F64Bytes mean(0); for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); mean += recording.getMean(stat); } return mean / F64(num_periods); } F64Bytes PeriodicRecording::getPeriodMean(const MemStatHandle& stat, size_t num_periods) { return getPeriodMean(static_cast&>(stat), num_periods); } F64Bytes PeriodicRecording::getPeriodStandardDeviation( const TraceType& stat, size_t num_periods /*= U32_MAX*/ ) { size_t total_periods = mRecordingPeriods.size(); num_periods = llmin(num_periods, isStarted() ? total_periods - 1 : total_periods); F64Bytes period_mean = getPeriodMean(stat, num_periods); S32 valid_period_count = 0; F64 sum_of_squares = 0; for (S32 i = 1; i <= num_periods; i++) { Recording& recording = getPrevRecording(i); if (recording.hasValue(stat)) { F64Bytes delta = recording.getMean(stat) - period_mean; sum_of_squares += delta.value() * delta.value(); valid_period_count++; } } return F64Bytes(valid_period_count ? sqrt(sum_of_squares / (F64)valid_period_count) : NaN); } F64Bytes PeriodicRecording::getPeriodStandardDeviation(const MemStatHandle& stat, size_t num_periods) { return getPeriodStandardDeviation(static_cast&>(stat), num_periods); } /////////////////////////////////////////////////////////////////////// // ExtendableRecording /////////////////////////////////////////////////////////////////////// void ExtendableRecording::extend() { // push the data back to accepted recording mAcceptedRecording.appendRecording(mPotentialRecording); // flush data, so we can start from scratch mPotentialRecording.reset(); } void ExtendableRecording::handleStart() { mPotentialRecording.start(); } void ExtendableRecording::handleStop() { mPotentialRecording.pause(); } void ExtendableRecording::handleReset() { mAcceptedRecording.reset(); mPotentialRecording.reset(); } void ExtendableRecording::handleSplitTo(ExtendableRecording& other) { mPotentialRecording.splitTo(other.mPotentialRecording); } /////////////////////////////////////////////////////////////////////// // ExtendablePeriodicRecording /////////////////////////////////////////////////////////////////////// ExtendablePeriodicRecording::ExtendablePeriodicRecording() : mAcceptedRecording(0), mPotentialRecording(0) {} void ExtendablePeriodicRecording::extend() { // push the data back to accepted recording mAcceptedRecording.appendPeriodicRecording(mPotentialRecording); // flush data, so we can start from scratch mPotentialRecording.reset(); } void ExtendablePeriodicRecording::handleStart() { mPotentialRecording.start(); } void ExtendablePeriodicRecording::handleStop() { mPotentialRecording.pause(); } void ExtendablePeriodicRecording::handleReset() { mAcceptedRecording.reset(); mPotentialRecording.reset(); } void ExtendablePeriodicRecording::handleSplitTo(ExtendablePeriodicRecording& other) { mPotentialRecording.splitTo(other.mPotentialRecording); } PeriodicRecording& get_frame_recording() { static LLThreadLocalPointer sRecording(new PeriodicRecording(1000, PeriodicRecording::STARTED)); return *sRecording; } } void LLStopWatchControlsMixinCommon::start() { switch (mPlayState) { case STOPPED: handleReset(); handleStart(); break; case PAUSED: handleStart(); break; case STARTED: break; default: llassert(false); break; } mPlayState = STARTED; } void LLStopWatchControlsMixinCommon::stop() { switch (mPlayState) { case STOPPED: break; case PAUSED: break; case STARTED: handleStop(); break; default: llassert(false); break; } mPlayState = STOPPED; } void LLStopWatchControlsMixinCommon::pause() { switch (mPlayState) { case STOPPED: break; case PAUSED: break; case STARTED: handleStop(); break; default: llassert(false); break; } mPlayState = PAUSED; } void LLStopWatchControlsMixinCommon::resume() { switch (mPlayState) { case STOPPED: handleStart(); break; case PAUSED: handleStart(); break; case STARTED: break; default: llassert(false); break; } mPlayState = STARTED; } void LLStopWatchControlsMixinCommon::restart() { switch (mPlayState) { case STOPPED: handleReset(); handleStart(); break; case PAUSED: handleReset(); handleStart(); break; case STARTED: handleReset(); break; default: llassert(false); break; } mPlayState = STARTED; } void LLStopWatchControlsMixinCommon::reset() { handleReset(); } void LLStopWatchControlsMixinCommon::setPlayState( EPlayState state ) { switch(state) { case STOPPED: stop(); break; case PAUSED: pause(); break; case STARTED: start(); break; default: llassert(false); break; } mPlayState = state; }