72 lines
1.4 KiB
Swift
72 lines
1.4 KiB
Swift
//
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// AtomicInt.swift
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// Platform
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//
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// Created by Krunoslav Zaher on 10/28/18.
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// Copyright © 2018 Krunoslav Zaher. All rights reserved.
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//
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import class Foundation.NSLock
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final class AtomicInt: NSLock {
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fileprivate var value: Int32
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public init(_ value: Int32 = 0) {
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self.value = value
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}
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}
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@discardableResult
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@inline(__always)
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func add(_ this: AtomicInt, _ value: Int32) -> Int32 {
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this.lock()
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let oldValue = this.value
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this.value += value
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this.unlock()
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return oldValue
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}
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@discardableResult
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@inline(__always)
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func sub(_ this: AtomicInt, _ value: Int32) -> Int32 {
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this.lock()
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let oldValue = this.value
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this.value -= value
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this.unlock()
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return oldValue
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}
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@discardableResult
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@inline(__always)
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func fetchOr(_ this: AtomicInt, _ mask: Int32) -> Int32 {
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this.lock()
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let oldValue = this.value
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this.value |= mask
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this.unlock()
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return oldValue
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}
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@inline(__always)
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func load(_ this: AtomicInt) -> Int32 {
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this.lock()
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let oldValue = this.value
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this.unlock()
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return oldValue
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}
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@discardableResult
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@inline(__always)
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func increment(_ this: AtomicInt) -> Int32 {
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return add(this, 1)
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}
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@discardableResult
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@inline(__always)
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func decrement(_ this: AtomicInt) -> Int32 {
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return sub(this, 1)
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}
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@inline(__always)
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func isFlagSet(_ this: AtomicInt, _ mask: Int32) -> Bool {
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return (load(this) & mask) != 0
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}
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