mirror of https://github.com/trudnai/Steve2.git
33 lines
770 B
Swift
33 lines
770 B
Swift
//
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// UnfairLock.swift
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// A2Mac
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//
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// Created by Tamas Rudnai on 11/11/22.
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// Copyright © 2022 GameAlloy. All rights reserved.
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//
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// Read http://www.russbishop.net/the-law for more information on why this is necessary
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final class UnfairLock {
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private var _lock: UnsafeMutablePointer<os_unfair_lock>
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init() {
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_lock = UnsafeMutablePointer<os_unfair_lock>.allocate(capacity: 1)
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_lock.initialize(to: os_unfair_lock())
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}
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deinit {
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_lock.deallocate()
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}
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func locked<ReturnValue>(_ f: () throws -> ReturnValue) rethrows -> ReturnValue {
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os_unfair_lock_lock(_lock)
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defer { os_unfair_lock_unlock(_lock) }
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return try f()
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}
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}
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//let lock = UnfairLock()
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//lock.locked {
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// // Critical region
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//}
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