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Example/Pods/ReactiveObjC/ReactiveObjC/RACSerialDisposable.h

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+//
+//  RACSerialDisposable.h
+//  ReactiveObjC
+//
+//  Created by Justin Spahr-Summers on 2013-07-22.
+//  Copyright (c) 2013 GitHub, Inc. All rights reserved.
+//
+
+#import "RACDisposable.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// A disposable that contains exactly one other disposable and allows it to be
+/// swapped out atomically.
+@interface RACSerialDisposable : RACDisposable
+
+/// The inner disposable managed by the serial disposable.
+///
+/// This property is thread-safe for reading and writing. However, if you want to
+/// read the current value _and_ write a new one atomically, use
+/// -swapInDisposable: instead.
+///
+/// Disposing of the receiver will also dispose of the current disposable set for
+/// this property, then set the property to nil. If any new disposable is set
+/// after the receiver is disposed, it will be disposed immediately and this
+/// property will remain set to nil.
+@property (atomic, strong, nullable) RACDisposable *disposable;
+
+/// Creates a serial disposable which will wrap the given disposable.
+///
+/// disposable - The value to set for `disposable`. This may be nil.
+///
+/// Returns a RACSerialDisposable.
++ (instancetype)serialDisposableWithDisposable:(nullable RACDisposable *)disposable;
+
+/// Atomically swaps the receiver's `disposable` for `newDisposable`.
+///
+/// newDisposable - The new value for `disposable`. If the receiver has already
+///                 been disposed, this disposable will be too, and `disposable`
+///                 will remain set to nil. This argument may be nil.
+///
+/// Returns the previous value for the `disposable` property.
+- (nullable RACDisposable *)swapInDisposable:(nullable RACDisposable *)newDisposable;
+
+@end
+
+NS_ASSUME_NONNULL_END