Swiftgram/Source/ASExperimentalFeatures.m
Adlai Holler 8b890f07be
Create a new dealloc queue that is more efficient (#931)
* Fork dealloc queue in an experiment

* Fix and put back

* Use the right selector

* Go simpler

* Clarify name

* Type inference

* Use CFTypeRefs like a boss

* Improve comments

* License header
2018-05-22 09:06:24 -07:00

50 lines
1.6 KiB
Objective-C

//
// ASExperimentalFeatures.m
// Texture
//
// Copyright (c) 2018-present, Pinterest, Inc. All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
#import <AsyncDisplayKit/ASExperimentalFeatures.h>
NSArray<NSString *> *ASExperimentalFeaturesGetNames(ASExperimentalFeatures flags)
{
NSArray *allNames = ASCreateOnce((@[@"exp_graphics_contexts",
@"exp_text_node",
@"exp_interface_state_coalesce",
@"exp_unfair_lock",
@"exp_infer_layer_defaults",
@"exp_network_image_queue",
@"exp_dealloc_queue_v2"]));
if (flags == ASExperimentalFeatureAll) {
return allNames;
}
// Go through all names, testing each bit.
NSUInteger i = 0;
return ASArrayByFlatMapping(allNames, NSString *name, ({
(flags & (1 << i++)) ? name : nil;
}));
}
// O(N^2) but with counts this small, it's probably faster
// than hashing the strings.
ASExperimentalFeatures ASExperimentalFeaturesFromArray(NSArray<NSString *> *array)
{
NSArray *allNames = ASExperimentalFeaturesGetNames(ASExperimentalFeatureAll);
ASExperimentalFeatures result = 0;
for (NSString *str in array) {
NSUInteger i = [allNames indexOfObject:str];
if (i != NSNotFound) {
result |= (1 << i);
}
}
return result;
}