Fabric: Introducing RCTSurfaceRegistry
Summary: Simple incapsulation of thread-safe weak set of Surface instances. Reviewed By: mdvacca Differential Revision: D7526409 fbshipit-source-id: 8dd789fd6148af3dacf74aac2125b022d11a0fdb
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <UIKit/UIKit.h>
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#import <React/RCTPrimitives.h>
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NS_ASSUME_NONNULL_BEGIN
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@class RCTFabricSurface;
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/**
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* Registry of Surfaces.
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* Incapsulates storing Surface objects and quering them by root tag.
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* All methods of the registry are thread-safe.
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* The registry stores Surface objects as weak refereces.
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*/
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@interface RCTSurfaceRegistry : NSObject
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/**
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* Adds Surface object into the registry.
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* The registry does not retain Surface references.
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*/
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- (void)registerSurface:(RCTFabricSurface *)surface;
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/**
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* Removes Surface object from the registry.
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*/
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- (void)unregisterSurface:(RCTFabricSurface *)surface;
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/**
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* Returns stored Surface object by given root tag.
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* If the registry does not have such Surface registred, returns `nil`.
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*/
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- (nullable RCTFabricSurface *)surfaceForRootTag:(ReactTag)rootTag;
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@end
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NS_ASSUME_NONNULL_END
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RCTSurfaceRegistry.h"
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#import <mutex>
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#import <React/RCTFabricSurface.h>
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@implementation RCTSurfaceRegistry {
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std::mutex _mutex;
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NSMapTable<id, RCTFabricSurface *> *_registry;
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}
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- (instancetype)init
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{
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if (self = [super init]) {
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_registry = [NSMapTable mapTableWithKeyOptions:NSPointerFunctionsIntegerPersonality | NSPointerFunctionsOpaqueMemory
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valueOptions:NSPointerFunctionsObjectPersonality];
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}
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return self;
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}
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- (void)registerSurface:(RCTFabricSurface *)surface
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{
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std::lock_guard<std::mutex> lock(_mutex);
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ReactTag rootTag = surface.rootViewTag.integerValue;
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[_registry setObject:surface forKey:(__bridge id)(void *)rootTag];
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}
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- (void)unregisterSurface:(RCTFabricSurface *)surface
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{
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std::lock_guard<std::mutex> lock(_mutex);
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ReactTag rootTag = surface.rootViewTag.integerValue;
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[_registry removeObjectForKey:(__bridge id)(void *)rootTag];
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}
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- (RCTFabricSurface *)surfaceForRootTag:(ReactTag)rootTag
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{
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std::lock_guard<std::mutex> lock(_mutex);
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return [_registry objectForKey:(__bridge id)(void *)rootTag];
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}
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@end
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