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