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31 lines
821 B
Objective-C
31 lines
821 B
Objective-C
//
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// ASSentinel.h
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// AsyncDisplayKit
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//
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// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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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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#import <Foundation/Foundation.h>
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/**
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@summary We want to avoid capturing layer instances on a background queue, but we want a way to cancel rendering
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immediately if another display pass begins. ASSentinel is owned by the layer and passed to the background
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block.
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*/
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@interface ASSentinel : NSObject
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/**
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Returns the current value of the sentinel.
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*/
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- (int32_t)value;
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/**
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Atomically increments the value and returns the new value.
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*/
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- (int32_t)increment;
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@end
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