57 lines
2.1 KiB
Swift
57 lines
2.1 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the SwiftNIO open source project
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//
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// Copyright (c) 2022 Apple Inc. and the SwiftNIO project authors
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// Licensed under Apache License v2.0
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//
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// See LICENSE.txt for license information
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// See CONTRIBUTORS.txt for the list of SwiftNIO project authors
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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//===----------------------------------------------------------------------===//
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#if (os(macOS) && swift(>=5.7.1)) || (!os(macOS) && swift(>=5.7))
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extension TimeAmount {
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@available(macOS 13, iOS 16, tvOS 16, watchOS 9, *)
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/// Creates a new `TimeAmount` for the given `Duration`, truncating and clamping if necessary.
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///
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/// - returns: `TimeAmount`, truncated to nanosecond precision, and clamped to `Int64.max` nanoseconds.
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public init(_ duration: Swift.Duration) {
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self = .nanoseconds(duration.nanosecondsClamped)
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}
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}
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@available(macOS 13, iOS 16, tvOS 16, watchOS 9, *)
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extension Swift.Duration {
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/// Construct a `Duration` given a number of nanoseconds represented as a `TimeAmount`.
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///
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/// - returns: A `Duration` representing a given number of nanoseconds.
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public init(_ timeAmount: TimeAmount) {
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self = .nanoseconds(timeAmount.nanoseconds)
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}
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}
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@available(macOS 13, iOS 16, tvOS 16, watchOS 9, *)
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internal extension Swift.Duration {
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/// The duration represented as nanoseconds, clamped to maximum expressible value.
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var nanosecondsClamped: Int64 {
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let components = self.components
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let secondsComponentNanos = components.seconds.multipliedReportingOverflow(by: 1_000_000_000)
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let attosCompononentNanos = components.attoseconds / 1_000_000_000
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let combinedNanos = secondsComponentNanos.partialValue.addingReportingOverflow(attosCompononentNanos)
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guard
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!secondsComponentNanos.overflow,
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!combinedNanos.overflow
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else {
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return .max
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}
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return combinedNanos.partialValue
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}
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}
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#endif // (os(macOS) && swift(>=5.7.1)) || (!os(macOS) && swift(>=5.7))
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