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dd4359db7b
* Optimize ASCATransactionQueue. This queue is very busy, and it runs on the main thread so it's important for it to be fast. Avoid waking up the run loop for every single node. Avoid a ton of NSPointerArray overhead that we don't need. Avoid retain/release traffic on the singleton by using an inline function. I confirmed that in release mode, the static __strong is correctly inlined and no ARC traffic is incurred. * Comment * Unlock right * Remove magic number
92 lines
2.7 KiB
Objective-C
92 lines
2.7 KiB
Objective-C
//
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// ASRunLoopQueue.h
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// Texture
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//
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// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import <Foundation/Foundation.h>
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#import <AsyncDisplayKit/ASBaseDefines.h>
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#import <AsyncDisplayKit/ASLocking.h>
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NS_ASSUME_NONNULL_BEGIN
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@protocol ASCATransactionQueueObserving <NSObject>
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- (void)prepareForCATransactionCommit;
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@end
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@interface ASAbstractRunLoopQueue : NSObject
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@end
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AS_SUBCLASSING_RESTRICTED
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@interface ASRunLoopQueue<ObjectType> : ASAbstractRunLoopQueue <ASLocking>
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/**
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* Create a new queue with the given run loop and handler.
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*
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* @param runloop The run loop that will drive this queue.
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* @param retainsObjects Whether the queue should retain its objects.
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* @param handlerBlock An optional block to be run for each enqueued object.
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*
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* @discussion You may pass @c nil for the handler if you simply want the objects to
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* be retained at enqueue time, and released during the run loop step. This is useful
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* for creating a "main deallocation queue", as @c ASDeallocQueue creates its own
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* worker thread with its own run loop.
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*/
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- (instancetype)initWithRunLoop:(CFRunLoopRef)runloop
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retainObjects:(BOOL)retainsObjects
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handler:(nullable void(^)(ObjectType dequeuedItem, BOOL isQueueDrained))handlerBlock;
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- (void)enqueue:(ObjectType)object;
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@property (readonly) BOOL isEmpty;
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@property (nonatomic) NSUInteger batchSize; // Default == 1.
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@property (nonatomic) BOOL ensureExclusiveMembership; // Default == YES. Set-like behavior.
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@end
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/**
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* The queue to run on main run loop before CATransaction commit.
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*
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* @discussion this queue will run after ASRunLoopQueue and before CATransaction commit
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* to get last chance of updating/coalesce info like interface state.
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* Each node will only be called once per transaction commit to reflect interface change.
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*/
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AS_SUBCLASSING_RESTRICTED
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@interface ASCATransactionQueue : ASAbstractRunLoopQueue
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@property (readonly) BOOL isEmpty;
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@property (readonly, getter=isEnabled) BOOL enabled;
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- (void)enqueue:(id<ASCATransactionQueueObserving>)object;
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@end
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NS_INLINE ASCATransactionQueue *ASCATransactionQueueGet(void) {
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static ASCATransactionQueue *q;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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q = [[ASCATransactionQueue alloc] init];
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});
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return q;
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}
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@interface ASDeallocQueue : NSObject
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@property (class, readonly) ASDeallocQueue *sharedDeallocationQueue;
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+ (ASDeallocQueue *)sharedDeallocationQueue NS_RETURNS_RETAINED;
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- (void)drain;
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- (void)releaseObjectInBackground:(id __strong _Nullable * _Nonnull)objectPtr;
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@end
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NS_ASSUME_NONNULL_END
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