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/*
* Copyright (C) 2005 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "StopWatch"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
/* for PRId64 */
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS 1
#endif
#include <inttypes.h>
#include <utils/Log.h>
#include <utils/Errors.h>
#include <utils/StopWatch.h>
/*****************************************************************************/
namespace android {
StopWatch::StopWatch(const char *name, int clock, uint32_t flags)
: mName(name), mClock(clock), mFlags(flags)
{
reset();
}
StopWatch::~StopWatch()
{
nsecs_t elapsed = elapsedTime();
const int n = mNumLaps;
ALOGD("StopWatch %s (us): %" PRId64 " ", mName, ns2us(elapsed));
for (int i=0 ; i<n ; i++) {
const nsecs_t soFar = mLaps[i].soFar;
const nsecs_t thisLap = mLaps[i].thisLap;
ALOGD(" [%d: %" PRId64 ", %" PRId64, i, ns2us(soFar), ns2us(thisLap));
}
}
const char* StopWatch::name() const
{
return mName;
}
nsecs_t StopWatch::lap()
{
nsecs_t elapsed = elapsedTime();
if (mNumLaps >= 8) {
elapsed = 0;
} else {
const int n = mNumLaps;
mLaps[n].soFar = elapsed;
mLaps[n].thisLap = n ? (elapsed - mLaps[n-1].soFar) : elapsed;
mNumLaps = n+1;
}
return elapsed;
}
nsecs_t StopWatch::elapsedTime() const
{
return systemTime(mClock) - mStartTime;
}
void StopWatch::reset()
{
mNumLaps = 0;
mStartTime = systemTime(mClock);
}
/*****************************************************************************/
}; // namespace android
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