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* [License] Simplify the Texture license to be pure Apache 2 (removing ASDK-Licenses) With permission of the Facebook Open Source team, we are simplifying the Texture license so that clients can rely on the Apache 2 terms that most of Texture is already covered by. This means that code originally forked from AsyncDisplayKit will be re-licensed from "BSD 3-clause + PATENTS v2" to Apache 2 without a PATENTS file. After getting confirmation that the updates to these core files look good, we'll propagate this new license header to all files (in this same PR) and get sign-off from all parties before landing. * [License] Update all Texture source files to be pure Apache 2. * Changelog entry for Apache 2 license update. * Revert "[License] Update all Texture source files to be pure Apache 2." This reverts commit ffa0fbbba9717d871dd16c4b07539f2f8208fc2b. * [License] Update all Texture source files to be pure Apache 2, maintaining copyrights. * [License] Update CONTRIBUTING, README, Podspec & Dangerfile.
93 lines
2.9 KiB
Objective-C
93 lines
2.9 KiB
Objective-C
//
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// ASConfigurationInternal.m
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// Texture
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//
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// 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 "ASConfigurationInternal.h"
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#import <AsyncDisplayKit/ASConfiguration.h>
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#import <AsyncDisplayKit/ASConfigurationDelegate.h>
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#import <stdatomic.h>
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#define ASGetSharedConfigMgr() (__bridge ASConfigurationManager *)ASConfigurationManager.sharedInstance
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@implementation ASConfigurationManager {
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ASConfiguration *_config;
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dispatch_queue_t _delegateQueue;
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_Atomic(ASExperimentalFeatures) _activatedExperiments;
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}
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/// Return CFTypeRef to avoid retain/release on this singleton.
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+ (CFTypeRef)sharedInstance
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{
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static CFTypeRef inst;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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inst = (__bridge_retained CFTypeRef)[[ASConfigurationManager alloc] init];
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});
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return inst;
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}
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+ (ASConfiguration *)defaultConfiguration NS_RETURNS_RETAINED
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{
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ASConfiguration *config = [[ASConfiguration alloc] init];
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// TODO(wsdwsd0829): Fix #788 before enabling it.
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// config.experimentalFeatures = ASExperimentalInterfaceStateCoalescing;
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return config;
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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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_delegateQueue = dispatch_queue_create("org.TextureGroup.Texture.ConfigNotifyQueue", DISPATCH_QUEUE_SERIAL);
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if ([ASConfiguration respondsToSelector:@selector(textureConfiguration)]) {
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_config = [[ASConfiguration textureConfiguration] copy];
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} else {
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_config = [ASConfigurationManager defaultConfiguration];
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}
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}
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return self;
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}
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- (BOOL)activateExperimentalFeature:(ASExperimentalFeatures)requested
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{
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if (_config == nil) {
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return NO;
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}
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NSAssert(__builtin_popcount(requested) == 1, @"Cannot activate multiple features at once with this method.");
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// We need to call out, whether it's enabled or not.
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// A/B testing requires even "control" users to be activated.
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ASExperimentalFeatures enabled = requested & _config.experimentalFeatures;
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ASExperimentalFeatures prevTriggered = atomic_fetch_or(&_activatedExperiments, requested);
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ASExperimentalFeatures newlyTriggered = requested & ~prevTriggered;
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// Notify delegate if needed.
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if (newlyTriggered != 0) {
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__unsafe_unretained id<ASConfigurationDelegate> del = _config.delegate;
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dispatch_async(_delegateQueue, ^{
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[del textureDidActivateExperimentalFeatures:newlyTriggered];
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});
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}
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return (enabled != 0);
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}
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// Define this even when !DEBUG, since we may run our tests in release mode.
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+ (void)test_resetWithConfiguration:(ASConfiguration *)configuration
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{
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ASConfigurationManager *inst = ASGetSharedConfigMgr();
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inst->_config = configuration ?: [self defaultConfiguration];
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atomic_store(&inst->_activatedExperiments, 0);
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}
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@end
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BOOL ASActivateExperimentalFeature(ASExperimentalFeatures feature)
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{
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return [ASGetSharedConfigMgr() activateExperimentalFeature:feature];
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}
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