43 lines
1.1 KiB
Objective-C
43 lines
1.1 KiB
Objective-C
#import <Foundation/Foundation.h>
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#import "CollapsingFutures.h"
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#import "Queue.h"
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typedef void (^LatestValueCallback)(id latestValue);
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/**
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*
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* An ObservableValue represents an asynchronous stream of values, such as 'latest state of toggle' or 'latest sensor
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* reading'.
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*
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*/
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@interface ObservableValue : NSObject {
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@protected
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NSMutableSet *callbacks;
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@private
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Queue *queuedActionsToRun;
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@private
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bool isRunningActions;
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@protected
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bool sealed;
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}
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@property (readonly, atomic) id currentValue;
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- (void)watchLatestValueOnArbitraryThread:(LatestValueCallback)callback
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untilCancelled:(TOCCancelToken *)untilCancelledToken;
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- (void)watchLatestValue:(LatestValueCallback)callback
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onThread:(NSThread *)thread
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untilCancelled:(TOCCancelToken *)untilCancelledToken;
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@end
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@interface ObservableValueController : ObservableValue
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+ (ObservableValueController *)observableValueControllerWithInitialValue:(id)value;
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- (void)updateValue:(id)value;
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- (void)adjustValue:(id (^)(id))adjustment;
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- (void)sealValue;
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@end
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