54 lines
1.5 KiB
Swift
54 lines
1.5 KiB
Swift
//
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// BinaryDisposable.swift
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// RxSwift
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//
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// Created by Krunoslav Zaher on 6/12/15.
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// Copyright © 2015 Krunoslav Zaher. All rights reserved.
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//
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/// Represents two disposable resources that are disposed together.
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private final class BinaryDisposable : DisposeBase, Cancelable {
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private var _isDisposed: AtomicInt = 0
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// state
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private var _disposable1: Disposable?
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private var _disposable2: Disposable?
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/// - returns: Was resource disposed.
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var isDisposed: Bool {
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return _isDisposed > 0
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}
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/// Constructs new binary disposable from two disposables.
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///
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/// - parameter disposable1: First disposable
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/// - parameter disposable2: Second disposable
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init(_ disposable1: Disposable, _ disposable2: Disposable) {
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_disposable1 = disposable1
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_disposable2 = disposable2
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super.init()
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}
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/// Calls the disposal action if and only if the current instance hasn't been disposed yet.
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///
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/// After invoking disposal action, disposal action will be dereferenced.
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func dispose() {
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if AtomicCompareAndSwap(0, 1, &_isDisposed) {
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_disposable1?.dispose()
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_disposable2?.dispose()
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_disposable1 = nil
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_disposable2 = nil
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}
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}
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}
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extension Disposables {
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/// Creates a disposable with the given disposables.
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public static func create(_ disposable1: Disposable, _ disposable2: Disposable) -> Cancelable {
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return BinaryDisposable(disposable1, disposable2)
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}
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}
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