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32 lines
1.2 KiB
Swift
32 lines
1.2 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the AsyncHTTPClient open source project
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//
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// Copyright (c) 2022 Apple Inc. and the AsyncHTTPClient 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 AsyncHTTPClient 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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/// ``UnsafeMutableTransferBox`` can be used to make non-`Sendable` values `Sendable` and mutable.
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/// It can be used to capture local mutable values in a `@Sendable` closure and mutate them from within the closure.
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/// As the name implies, the usage of this is unsafe because it disables the sendable checking of the compiler and does not add any synchronisation.
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@usableFromInline
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final class UnsafeMutableTransferBox<Wrapped> {
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@usableFromInline
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var wrappedValue: Wrapped
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@inlinable
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init(_ wrappedValue: Wrapped) {
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self.wrappedValue = wrappedValue
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}
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}
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#if swift(>=5.5) && canImport(_Concurrency)
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extension UnsafeMutableTransferBox: @unchecked Sendable {}
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#endif
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