| // Copyright 2019 The Dawn Authors |
| // |
| // 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 <stdint.h> |
| #include <time.h> |
| |
| #include "dawn/utils/Timer.h" |
| |
| namespace dawn::utils { |
| |
| namespace { |
| |
| uint64_t GetCurrentTimeNs() { |
| struct timespec currentTime; |
| clock_gettime(CLOCK_MONOTONIC, ¤tTime); |
| return currentTime.tv_sec * 1'000'000'000llu + currentTime.tv_nsec; |
| } |
| |
| } // anonymous namespace |
| |
| class PosixTimer : public Timer { |
| public: |
| PosixTimer() : Timer(), mRunning(false) {} |
| |
| ~PosixTimer() override = default; |
| |
| void Start() override { |
| mStartTimeNs = GetCurrentTimeNs(); |
| mRunning = true; |
| } |
| |
| void Stop() override { |
| mStopTimeNs = GetCurrentTimeNs(); |
| mRunning = false; |
| } |
| |
| double GetElapsedTime() const override { |
| uint64_t endTimeNs; |
| if (mRunning) { |
| endTimeNs = GetCurrentTimeNs(); |
| } else { |
| endTimeNs = mStopTimeNs; |
| } |
| |
| return (endTimeNs - mStartTimeNs) * 1e-9; |
| } |
| |
| double GetAbsoluteTime() override { return GetCurrentTimeNs() * 1e-9; } |
| |
| private: |
| bool mRunning; |
| uint64_t mStartTimeNs; |
| uint64_t mStopTimeNs; |
| }; |
| |
| Timer* CreateTimer() { |
| return new PosixTimer(); |
| } |
| |
| } // namespace dawn::utils |