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49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include <cassert>
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#include <chrono>
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namespace arrow {
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namespace internal {
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class StopWatch {
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// This clock should give us wall clock time
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using ClockType = std::chrono::steady_clock;
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public:
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StopWatch() {}
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void Start() { start_ = ClockType::now(); }
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// Returns time in nanoseconds.
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uint64_t Stop() {
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auto stop = ClockType::now();
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std::chrono::nanoseconds d = stop - start_;
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assert(d.count() >= 0);
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return static_cast<uint64_t>(d.count());
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}
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private:
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std::chrono::time_point<ClockType> start_;
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};
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} // namespace internal
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} // namespace arrow
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