/*
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* Copyright (c) 2014, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#import <Foundation/Foundation.h>
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#import "OBSBFCancellationTokenRegistration.h"
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NS_ASSUME_NONNULL_BEGIN
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/*!
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A block that will be called when a token is cancelled.
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*/
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typedef void(^OBSBFCancellationBlock)(void);
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/*!
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The consumer view of a CancellationToken.
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Propagates notification that operations should be canceled.
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A OBSBFCancellationToken has methods to inspect whether the token has been cancelled.
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*/
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@interface OBSBFCancellationToken : NSObject
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/*!
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Whether cancellation has been requested for this token source.
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*/
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@property (nonatomic, assign, readonly, getter=isCancellationRequested) BOOL cancellationRequested;
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/*!
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Register a block to be notified when the token is cancelled.
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If the token is already cancelled the delegate will be notified immediately.
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*/
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- (OBSBFCancellationTokenRegistration *)registerCancellationObserverWithBlock:(OBSBFCancellationBlock)block;
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@end
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NS_ASSUME_NONNULL_END
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