1 /* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "StopWatch" 18 19 #include <utils/StopWatch.h> 20 21 /* for PRId64 */ 22 #ifndef __STDC_FORMAT_MACROS 23 #define __STDC_FORMAT_MACROS 1 24 #endif 25 #include <inttypes.h> 26 27 #include <utils/Log.h> 28 29 /*****************************************************************************/ 30 31 namespace android { 32 33 StopWatch::StopWatch(const char* name, int clock) : mName(name), mClock(clock) { 34 reset(); 35 } 36 37 StopWatch::~StopWatch() 38 { 39 nsecs_t elapsed = elapsedTime(); 40 const int n = mNumLaps; 41 ALOGD("StopWatch %s (us): %" PRId64 " ", mName, ns2us(elapsed)); 42 for (int i=0 ; i<n ; i++) { 43 const nsecs_t soFar = mLaps[i].soFar; 44 const nsecs_t thisLap = mLaps[i].thisLap; 45 ALOGD(" [%d: %" PRId64 ", %" PRId64, i, ns2us(soFar), ns2us(thisLap)); 46 } 47 } 48 49 const char* StopWatch::name() const 50 { 51 return mName; 52 } 53 54 nsecs_t StopWatch::lap() 55 { 56 nsecs_t elapsed = elapsedTime(); 57 if (mNumLaps >= 8) { 58 elapsed = 0; 59 } else { 60 const int n = mNumLaps; 61 mLaps[n].soFar = elapsed; 62 mLaps[n].thisLap = n ? (elapsed - mLaps[n-1].soFar) : elapsed; 63 mNumLaps = n+1; 64 } 65 return elapsed; 66 } 67 68 nsecs_t StopWatch::elapsedTime() const 69 { 70 return systemTime(mClock) - mStartTime; 71 } 72 73 void StopWatch::reset() 74 { 75 mNumLaps = 0; 76 mStartTime = systemTime(mClock); 77 } 78 79 80 /*****************************************************************************/ 81 82 }; // namespace android 83 84
