| // Copyright 2010-2015, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "base/stopwatch.h" |
| #include "base/util.h" |
| |
| namespace mozc { |
| Stopwatch Stopwatch::StartNew() { |
| Stopwatch stopwatch = Stopwatch(); |
| stopwatch.Start(); |
| return stopwatch; |
| } |
| |
| Stopwatch::Stopwatch() |
| : state_(STOPWATCH_STOPPED), |
| frequency_(1000), |
| start_timestamp_(0), |
| elapsed_timestamp_(0) { |
| frequency_ = Util::GetFrequency(); |
| |
| Reset(); |
| } |
| |
| void Stopwatch::Reset() { |
| start_timestamp_ = elapsed_timestamp_ = 0; |
| state_ = STOPWATCH_STOPPED; |
| } |
| |
| void Stopwatch::Start() { |
| if (state_ == STOPWATCH_STOPPED) { |
| start_timestamp_ = Util::GetTicks(); |
| state_ = STOPWATCH_RUNNING; |
| } |
| } |
| |
| void Stopwatch::Stop() { |
| if (state_ == STOPWATCH_RUNNING) { |
| const int64 stop_timestamp = Util::GetTicks(); |
| elapsed_timestamp_ += (stop_timestamp - start_timestamp_); |
| start_timestamp_ = 0; |
| state_ = STOPWATCH_STOPPED; |
| } |
| } |
| |
| int64 Stopwatch::GetElapsedMilliseconds() { |
| return GetElapsedTicks() * 1000 / frequency_; |
| } |
| |
| double Stopwatch::GetElapsedMicroseconds() { |
| return GetElapsedTicks() * 1.0e6 / frequency_; |
| } |
| |
| double Stopwatch::GetElapsedNanoseconds() { |
| return GetElapsedTicks() * 1.0e9 / frequency_; |
| } |
| |
| int64 Stopwatch::GetElapsedTicks() { |
| if (state_ == STOPWATCH_STOPPED) { |
| return elapsed_timestamp_; |
| } |
| |
| const int64 current_timestamp = Util::GetTicks(); |
| elapsed_timestamp_ += (current_timestamp - start_timestamp_); |
| start_timestamp_ = current_timestamp; |
| |
| return elapsed_timestamp_; |
| } |
| |
| bool Stopwatch::IsRunning() const { |
| return state_ == STOPWATCH_RUNNING; |
| } |
| } // namespace mozc |