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// Copyright 2017 Google
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import "Private/FIRMutableDictionary.h"
@implementation FIRMutableDictionary {
/// The mutable dictionary.
NSMutableDictionary *_objects;
/// Serial synchronization queue. All reads should use dispatch_sync, while writes use
/// dispatch_async.
dispatch_queue_t _queue;
}
- (instancetype)init {
self = [super init];
if (self) {
_objects = [[NSMutableDictionary alloc] init];
_queue = dispatch_queue_create("FIRMutableDictionary", DISPATCH_QUEUE_SERIAL);
}
return self;
}
- (NSString *)description {
__block NSString *description;
dispatch_sync(_queue, ^{
description = _objects.description;
});
return description;
}
- (id)objectForKey:(id)key {
__block id object;
dispatch_sync(_queue, ^{
object = _objects[key];
});
return object;
}
- (void)setObject:(id)object forKey:(id<NSCopying>)key {
dispatch_async(_queue, ^{
_objects[key] = object;
});
}
- (void)removeObjectForKey:(id)key {
dispatch_async(_queue, ^{
[_objects removeObjectForKey:key];
});
}
- (void)removeAllObjects {
dispatch_async(_queue, ^{
[_objects removeAllObjects];
});
}
- (NSUInteger)count {
__block NSUInteger count;
dispatch_sync(_queue, ^{
count = _objects.count;
});
return count;
}
- (id)objectForKeyedSubscript:(id<NSCopying>)key {
// The method this calls is already synchronized.
return [self objectForKey:key];
}
- (void)setObject:(id)obj forKeyedSubscript:(id<NSCopying>)key {
// The method this calls is already synchronized.
[self setObject:obj forKey:key];
}
- (NSDictionary *)dictionary {
__block NSDictionary *dictionary;
dispatch_sync(_queue, ^{
dictionary = [_objects copy];
});
return dictionary;
}
@end
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