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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_THREADING_TRAITS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_THREADING_TRAITS_H_
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/blink/renderer/platform/wtf/deque.h"
#include "third_party/blink/renderer/platform/wtf/hash_counted_set.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
#include "third_party/blink/renderer/platform/wtf/hash_set.h"
#include "third_party/blink/renderer/platform/wtf/hash_table.h"
#include "third_party/blink/renderer/platform/wtf/type_traits.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
template <typename T>
class SameThreadCheckedMember;
template <typename T>
class TraceWrapperMember;
// ThreadAffinity indicates which threads objects can be used on. We
// distinguish between objects that can be used on the main thread
// only and objects that can be used on any thread.
//
// For objects that can only be used on the main thread, we avoid going
// through thread-local storage to get to the thread state. This is
// important for performance.
enum ThreadAffinity {
kAnyThread,
kMainThreadOnly,
};
// TODO(haraken): These forward declarations violate dependency rules.
// Remove them.
class Node;
class NodeList;
class NodeRareDataBase;
template <
typename T,
bool mainThreadOnly =
WTF::IsSubclass<typename std::remove_const<T>::type, Node>::value ||
WTF::IsSubclass<typename std::remove_const<T>::type, NodeList>::value ||
WTF::IsSubclass<typename std::remove_const<T>::type,
NodeRareDataBase>::value>
struct DefaultThreadingTrait;
template <typename T>
struct DefaultThreadingTrait<T, false> {
STATIC_ONLY(DefaultThreadingTrait);
static const ThreadAffinity kAffinity = kAnyThread;
};
template <typename T>
struct DefaultThreadingTrait<T, true> {
STATIC_ONLY(DefaultThreadingTrait);
static const ThreadAffinity kAffinity = kMainThreadOnly;
};
class HeapAllocator;
template <typename Table>
class HeapHashTableBacking;
template <typename T, typename Traits>
class HeapVectorBacking;
template <typename T>
class Member;
template <typename T>
class WeakMember;
template <typename T>
struct ThreadingTrait {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = DefaultThreadingTrait<T>::kAffinity;
};
template <typename U>
class ThreadingTrait<const U> : public ThreadingTrait<U> {};
template <typename T>
struct ThreadingTrait<Member<T>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};
template <typename T>
struct ThreadingTrait<SameThreadCheckedMember<T>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadingTrait<T>::Affinity;
};
template <typename T>
struct ThreadingTrait<TraceWrapperMember<T>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};
template <typename T>
struct ThreadingTrait<WeakMember<T>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};
template <typename Key, typename Value, typename T, typename U, typename V>
struct ThreadingTrait<HashMap<Key, Value, T, U, V, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity =
(ThreadingTrait<Key>::kAffinity == kMainThreadOnly) &&
(ThreadingTrait<Value>::kAffinity == kMainThreadOnly)
? kMainThreadOnly
: kAnyThread;
};
template <typename First, typename Second>
struct ThreadingTrait<WTF::KeyValuePair<First, Second>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity =
(ThreadingTrait<First>::kAffinity == kMainThreadOnly) &&
(ThreadingTrait<Second>::kAffinity == kMainThreadOnly)
? kMainThreadOnly
: kAnyThread;
};
template <typename T, typename U, typename V>
struct ThreadingTrait<HashSet<T, U, V, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};
template <typename T, size_t inlineCapacity>
struct ThreadingTrait<Vector<T, inlineCapacity, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};
template <typename T, typename Traits>
struct ThreadingTrait<HeapVectorBacking<T, Traits>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadingTrait<T>::Affinity;
};
template <typename T, size_t inlineCapacity>
struct ThreadingTrait<Deque<T, inlineCapacity, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};
template <typename T, typename U, typename V>
struct ThreadingTrait<HashCountedSet<T, U, V, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};
template <typename Table>
struct ThreadingTrait<HeapHashTableBacking<Table>> {
STATIC_ONLY(ThreadingTrait);
using Key = typename Table::KeyType;
using Value = typename Table::ValueType;
static const ThreadAffinity kAffinity =
(ThreadingTrait<Key>::Affinity == kMainThreadOnly) &&
(ThreadingTrait<Value>::Affinity == kMainThreadOnly)
? kMainThreadOnly
: kAnyThread;
};
template <typename T, typename U, typename V, typename W, typename X>
class HeapHashMap;
template <typename T, typename U, typename V>
class HeapHashSet;
template <typename T, size_t inlineCapacity>
class HeapVector;
template <typename T, size_t inlineCapacity>
class HeapDeque;
template <typename T, typename U, typename V>
class HeapHashCountedSet;
template <typename T, typename U, typename V, typename W, typename X>
struct ThreadingTrait<HeapHashMap<T, U, V, W, X>>
: public ThreadingTrait<HashMap<T, U, V, W, X, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
};
template <typename T, typename U, typename V>
struct ThreadingTrait<HeapHashSet<T, U, V>>
: public ThreadingTrait<HashSet<T, U, V, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
};
template <typename T, size_t inlineCapacity>
struct ThreadingTrait<HeapVector<T, inlineCapacity>>
: public ThreadingTrait<Vector<T, inlineCapacity, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
};
template <typename T, size_t inlineCapacity>
struct ThreadingTrait<HeapDeque<T, inlineCapacity>>
: public ThreadingTrait<Deque<T, inlineCapacity, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
};
template <typename T, typename U, typename V>
struct ThreadingTrait<HeapHashCountedSet<T, U, V>>
: public ThreadingTrait<HashCountedSet<T, U, V, HeapAllocator>> {
STATIC_ONLY(ThreadingTrait);
};
} // namespace blink
#endif
|
