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// 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.
#ifndef SRC_DAWN_UTILS_TIMER_H_
#define SRC_DAWN_UTILS_TIMER_H_
namespace utils {
class Timer {
public:
virtual ~Timer() {}
// Timer functionality: Use start() and stop() to record the duration and use
// getElapsedTime() to query that duration. If getElapsedTime() is called in between, it
// will report the elapsed time since start().
virtual void Start() = 0;
virtual void Stop() = 0;
virtual double GetElapsedTime() const = 0;
// Timestamp functionality: Use getAbsoluteTime() to get an absolute time with an unknown
// origin. This time moves forward regardless of start()/stop().
virtual double GetAbsoluteTime() = 0;
};
Timer* CreateTimer();
} // namespace utils
#endif // SRC_DAWN_UTILS_TIMER_H_