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(const char * name,int clock,uint32_t flags)34 StopWatch::StopWatch(const char *name, int clock, uint32_t flags)
35 : mName(name), mClock(clock), mFlags(flags)
36 {
37 reset();
38 }
39
~StopWatch()40 StopWatch::~StopWatch()
41 {
42 nsecs_t elapsed = elapsedTime();
43 const int n = mNumLaps;
44 ALOGD("StopWatch %s (us): %" PRId64 " ", mName, ns2us(elapsed));
45 for (int i=0 ; i<n ; i++) {
46 const nsecs_t soFar = mLaps[i].soFar;
47 const nsecs_t thisLap = mLaps[i].thisLap;
48 ALOGD(" [%d: %" PRId64 ", %" PRId64, i, ns2us(soFar), ns2us(thisLap));
49 }
50 }
51
name() const52 const char* StopWatch::name() const
53 {
54 return mName;
55 }
56
lap()57 nsecs_t StopWatch::lap()
58 {
59 nsecs_t elapsed = elapsedTime();
60 if (mNumLaps >= 8) {
61 elapsed = 0;
62 } else {
63 const int n = mNumLaps;
64 mLaps[n].soFar = elapsed;
65 mLaps[n].thisLap = n ? (elapsed - mLaps[n-1].soFar) : elapsed;
66 mNumLaps = n+1;
67 }
68 return elapsed;
69 }
70
elapsedTime() const71 nsecs_t StopWatch::elapsedTime() const
72 {
73 return systemTime(mClock) - mStartTime;
74 }
75
reset()76 void StopWatch::reset()
77 {
78 mNumLaps = 0;
79 mStartTime = systemTime(mClock);
80 }
81
82
83 /*****************************************************************************/
84
85 }; // namespace android
86
87