63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
// Copyright 2010 Google
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef OR_TOOLS_BASE_TIMER_H_
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#define OR_TOOLS_BASE_TIMER_H_
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#include "base/basictypes.h"
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#include "base/macros.h"
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namespace operations_research {
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class WallTimer {
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public:
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WallTimer();
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void Start();
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void Stop();
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bool Reset();
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void Restart();
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bool IsRunning() const;
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int64 GetInMs() const;
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double Get() const;
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static int64 GetTimeInMicroSeconds();
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private:
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int64 start_usec_; // start time in microseconds.
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int64 sum_usec_; // sum of time diffs in microseconds.
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bool has_started_;
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DISALLOW_COPY_AND_ASSIGN(WallTimer);
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};
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// This class of timer is very precise and potentially more expensive than
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// the WallTimer class.
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class CycleTimer {
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public:
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CycleTimer();
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void Reset();
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void Start();
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void Stop();
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int64 GetInUsec() const;
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int64 GetInMs() const;
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private:
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enum State {
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INIT,
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STARTED,
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STOPPED
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};
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int64 time_in_us_;
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State state_;
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};
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} // namespace operations_research
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#endif // OR_TOOLS_BASE_TIMER_H_
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