| /* |
| * Copyright (C) 2011 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. |
| */ |
| |
| #include "time_util.h" |
| #include "utilities.h" |
| |
| #include <cutils/log.h> |
| #include <sys/time.h> |
| #include <map> |
| |
| namespace android { |
| namespace filterfw { |
| |
| uint64_t getTimeUs() { |
| static long basesec; |
| struct timeval tv; |
| uint64_t nowtime; |
| gettimeofday(&tv, 0); |
| if (basesec == 0) { |
| basesec = tv.tv_sec; |
| } |
| nowtime = (uint64_t)(tv.tv_sec - basesec) * (uint64_t)1000000 + |
| (uint64_t)tv.tv_usec; |
| return nowtime; |
| } |
| |
| const uint64_t NamedStopWatch::kDefaultLoggingPeriodInFrames = 100; |
| |
| NamedStopWatch::NamedStopWatch(const std::string& name) |
| : mName(name), |
| mLoggingPeriodInFrames(kDefaultLoggingPeriodInFrames), |
| mStartUSec(0), |
| mNumCalls(0), |
| mTotalUSec(0) { |
| } |
| |
| void NamedStopWatch::Start() { |
| mStartUSec = getTimeUs(); |
| } |
| |
| void NamedStopWatch::Stop() { |
| if (!mStartUSec) { |
| return; |
| } |
| uint64_t stopUSec = getTimeUs(); |
| if (stopUSec > mStartUSec) { |
| ++mNumCalls; |
| mTotalUSec += stopUSec - mStartUSec; |
| if (mNumCalls % mLoggingPeriodInFrames == 0) { |
| const float mSec = TotalUSec() * 1.0E-3f / NumCalls(); |
| ALOGE("%s: %f ms", Name().c_str(), mSec); |
| } |
| } |
| mStartUSec = 0; |
| } |
| |
| namespace { |
| static NamedStopWatch* GetWatchForName(const std::string& watch_name) { |
| // TODO: this leaks the NamedStopWatch objects. Replace it with a |
| // singleton to avoid that and make it thread safe. |
| static std::map<std::string, NamedStopWatch*> watches; |
| NamedStopWatch* watch = FindPtrOrNull(watches, watch_name); |
| if (!watch) { |
| watch = new NamedStopWatch(watch_name); |
| watches[watch_name] = watch; |
| } |
| return watch; |
| }; |
| } // namespace |
| |
| ScopedTimer::ScopedTimer(const std::string& stop_watch_name) { |
| mWatch = GetWatchForName(stop_watch_name); |
| mWatch->Start(); |
| } |
| |
| } // namespace filterfw |
| } // namespace android |