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Move chrono interop utils to new library (#201)
This structure makes more sense and makes the library easier to understand.
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| Original file line number | Diff line number | Diff line change |
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| // Copyright 2023 Aurora Operations, Inc. | ||
| // | ||
| // 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. | ||
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| #pragma once | ||
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| #include <chrono> | ||
| #include <cstdint> | ||
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| #include "au/quantity.hh" | ||
| #include "au/units/seconds.hh" | ||
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| namespace au { | ||
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| // Define 1:1 mapping between duration types of chrono library and our library. | ||
| template <typename RepT, typename Period> | ||
| struct CorrespondingQuantity<std::chrono::duration<RepT, Period>> { | ||
| using Unit = decltype(Seconds{} * (mag<Period::num>() / mag<Period::den>())); | ||
| using Rep = RepT; | ||
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| using ChronoDuration = std::chrono::duration<Rep, Period>; | ||
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| static constexpr Rep extract_value(ChronoDuration d) { return d.count(); } | ||
| static constexpr ChronoDuration construct_from_value(Rep x) { return ChronoDuration{x}; } | ||
| }; | ||
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| // Convert any Au duration quantity to an equivalent `std::chrono::duration`. | ||
| template <typename U, typename R> | ||
| constexpr auto as_chrono_duration(Quantity<U, R> dt) { | ||
| constexpr auto ratio = unit_ratio(U{}, seconds); | ||
| static_assert(is_rational(ratio), "Cannot convert to chrono::duration with non-rational ratio"); | ||
| return std::chrono::duration<R, | ||
| std::ratio<get_value<std::intmax_t>(numerator(ratio)), | ||
| get_value<std::intmax_t>(denominator(ratio))>>{dt}; | ||
| } | ||
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| } // namespace au |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // Copyright 2023 Aurora Operations, Inc. | ||
| // | ||
| // 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. | ||
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| #include "au/chrono_interop.hh" | ||
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| #include "au/prefix.hh" | ||
| #include "au/testing.hh" | ||
| #include "gtest/gtest.h" | ||
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| using namespace std::chrono_literals; | ||
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| namespace au { | ||
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| TEST(DurationQuantity, InterconvertsWithExactlyEquivalentChronoDuration) { | ||
| constexpr QuantityD<Seconds> from_chrono = std::chrono::duration<double>{1.23}; | ||
| EXPECT_THAT(from_chrono, SameTypeAndValue(seconds(1.23))); | ||
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| constexpr auto val = std::chrono::nanoseconds::rep{456}; | ||
| constexpr std::chrono::nanoseconds from_au = nano(seconds)(val); | ||
| EXPECT_THAT(from_au.count(), SameTypeAndValue(val)); | ||
| } | ||
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| TEST(DurationQuantity, InterconvertsWithIndirectlyEquivalentChronoDuration) { | ||
| constexpr QuantityD<Seconds> from_chrono = as_quantity(1234ms); | ||
| EXPECT_THAT(from_chrono, SameTypeAndValue(seconds(1.234))); | ||
| } | ||
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| TEST(AsChronoDuration, ProducesExpectedResults) { | ||
| constexpr auto original = milli(seconds)(12.3f); | ||
| constexpr auto result = as_chrono_duration(original); | ||
| EXPECT_THAT(result.count(), SameTypeAndValue(12.3f)); | ||
| EXPECT_THAT(as_quantity(result), QuantityEquivalent(original)); | ||
| } | ||
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| } // namespace au |