1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
// 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 = self->_objects.description;
});
return description;
}
- (id)objectForKey:(id)key {
__block id object;
dispatch_sync(_queue, ^{
object = self->_objects[key];
});
return object;
}
- (void)setObject:(id)object forKey:(id<NSCopying>)key {
dispatch_async(_queue, ^{
self->_objects[key] = object;
});
}
- (void)removeObjectForKey:(id)key {
dispatch_async(_queue, ^{
[self->_objects removeObjectForKey:key];
});
}
- (void)removeAllObjects {
dispatch_async(_queue, ^{
[self->_objects removeAllObjects];
});
}
- (NSUInteger)count {
__block NSUInteger count;
dispatch_sync(_queue, ^{
count = self->_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 = [self->_objects copy];
});
return dictionary;
}
@end
|
