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03d8ea5248
This is a tool specifically designed to generate Xcode projects for the Swift repo (as well as a couple of adjacent repos such as LLVM and Clang). It aims to provide a much more user-friendly experience than the CMake Xcode generation (`build-script --xcode`).
40 lines
1.0 KiB
Swift
40 lines
1.0 KiB
Swift
//===--- MutexBox.swift ---------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2024 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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final class MutexBox<T>: @unchecked Sendable {
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private let lock = Lock()
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private var value: T
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init(_ value: T) {
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self.value = value
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}
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@inline(__always)
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func withLock<R>(_ body: (inout T) throws -> R) rethrows -> R {
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try lock.withLock {
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try body(&value)
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}
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}
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}
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extension MutexBox {
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convenience init<U>() where T == U? {
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self.init(nil)
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}
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convenience init<U, V>() where T == [U: V] {
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self.init([:])
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}
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convenience init<U>() where T == [U] {
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self.init([])
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}
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}
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