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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>
NS_ASSUME_NONNULL_BEGIN
@class BFCancellationToken;
/*!
BFCancellationTokenSource represents the producer side of a CancellationToken.
Signals to a CancellationToken that it should be canceled.
It is a cancellation token that also has methods
for changing the state of a token by cancelling it.
*/
@interface BFCancellationTokenSource : NSObject
/*!
Creates a new cancellation token source.
*/
+ (instancetype)cancellationTokenSource;
/*!
The cancellation token associated with this CancellationTokenSource.
*/
@property (nonatomic, strong, readonly) BFCancellationToken *token;
/*!
Whether cancellation has been requested for this token source.
*/
@property (nonatomic, assign, readonly, getter=isCancellationRequested) BOOL cancellationRequested;
/*!
Cancels the token if it has not already been cancelled.
*/
- (void)cancel;
/*!
Schedules a cancel operation on this CancellationTokenSource after the specified number of milliseconds.
@param millis The number of milliseconds to wait before completing the returned task.
If delay is `0` the cancel is executed immediately. If delay is `-1` any scheduled cancellation is stopped.
*/
- (void)cancelAfterDelay:(int)millis;
/*!
Releases all resources associated with this token source,
including disposing of all registrations.
*/
- (void)dispose;
@end
NS_ASSUME_NONNULL_END