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author | The Android Open Source Project <initial-contribution@android.com> | 2008-10-21 07:00:00 -0700 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2008-10-21 07:00:00 -0700 |
commit | 7c1b96a165f970a09ed239bb4fb3f1b0d8f2a407 (patch) | |
tree | df5a6539447324de36e95b057d6b9f0361b7a250 /libs/utils/StopWatch.cpp | |
download | frameworks_native-7c1b96a165f970a09ed239bb4fb3f1b0d8f2a407.zip frameworks_native-7c1b96a165f970a09ed239bb4fb3f1b0d8f2a407.tar.gz frameworks_native-7c1b96a165f970a09ed239bb4fb3f1b0d8f2a407.tar.bz2 |
Initial Contribution
Diffstat (limited to 'libs/utils/StopWatch.cpp')
-rw-r--r-- | libs/utils/StopWatch.cpp | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/libs/utils/StopWatch.cpp b/libs/utils/StopWatch.cpp new file mode 100644 index 0000000..68a1c52 --- /dev/null +++ b/libs/utils/StopWatch.cpp @@ -0,0 +1,79 @@ +/* + * 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> + +#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), + mStartTime(0), mNumLaps(0) +{ + mStartTime = systemTime(mClock); +} + +StopWatch::~StopWatch() +{ + nsecs_t elapsed = elapsedTime(); + const int n = mNumLaps; + LOGD("StopWatch %s (us): %lld ", mName, ns2us(elapsed)); + for (int i=0 ; i<n ; i++) { + const nsecs_t soFar = mLaps[i].soFar; + const nsecs_t thisLap = mLaps[i].thisLap; + LOGD(" [%d: %lld, %lld]", 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; +} + + +/*****************************************************************************/ + +}; // namespace android + |