51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
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// Copyright 2020 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef UTIL_CHRONO_HELPERS_H_
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#define UTIL_CHRONO_HELPERS_H_
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#include <chrono>
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// This file is a collection of helpful utilities and using statement for
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// working with std::chrono. In practice we previously defined these frequently,
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// this header allows for a single set of convenience statements.
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namespace openscreen {
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using hours = std::chrono::hours;
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using microseconds = std::chrono::microseconds;
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using milliseconds = std::chrono::milliseconds;
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using nanoseconds = std::chrono::nanoseconds;
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using seconds = std::chrono::seconds;
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// Casting statements. Note that duration_cast is not a type, it's a function,
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// so its behavior is different than the using statements above.
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template <typename D>
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static constexpr hours to_hours(D d) {
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return std::chrono::duration_cast<hours>(d);
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}
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template <typename D>
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static constexpr microseconds to_microseconds(D d) {
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return std::chrono::duration_cast<microseconds>(d);
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}
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template <typename D>
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static constexpr milliseconds to_milliseconds(D d) {
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return std::chrono::duration_cast<milliseconds>(d);
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}
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template <typename D>
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static constexpr nanoseconds to_nanoseconds(D d) {
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return std::chrono::duration_cast<nanoseconds>(d);
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}
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template <typename D>
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static constexpr seconds to_seconds(D d) {
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return std::chrono::duration_cast<seconds>(d);
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}
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} // namespace openscreen
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#endif // UTIL_CHRONO_HELPERS_H_
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