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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
|
/*
* Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
namespace WTF {
// This specialization is a direct copy of HashMap, with overloaded functions
// to allow for lookup by pointer instead of RefPtr, avoiding ref-count churn.
// FIXME: Find a better way that doesn't require an entire copy of the HashMap template.
template<typename RawKeyType, typename ValueType, typename ValueTraits, typename HashFunctions>
struct RefPtrHashMapRawKeyTranslator {
typedef typename ValueType::first_type KeyType;
typedef typename ValueType::second_type MappedType;
typedef typename ValueTraits::FirstTraits KeyTraits;
typedef typename ValueTraits::SecondTraits MappedTraits;
static unsigned hash(RawKeyType key) { return HashFunctions::hash(key); }
static bool equal(const KeyType& a, RawKeyType b) { return HashFunctions::equal(a, b); }
static void translate(ValueType& location, RawKeyType key, const MappedType& mapped)
{
location.first = key;
location.second = mapped;
}
};
template<typename T, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
class HashMap<RefPtr<T>, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg> : public FastAllocBase {
private:
typedef KeyTraitsArg KeyTraits;
typedef MappedTraitsArg MappedTraits;
typedef PairHashTraits<KeyTraits, MappedTraits> ValueTraits;
public:
typedef typename KeyTraits::TraitType KeyType;
typedef T* RawKeyType;
typedef typename MappedTraits::TraitType MappedType;
typedef typename ValueTraits::TraitType ValueType;
private:
typedef HashArg HashFunctions;
typedef HashTable<KeyType, ValueType, PairFirstExtractor<ValueType>,
HashFunctions, ValueTraits, KeyTraits> HashTableType;
typedef RefPtrHashMapRawKeyTranslator<RawKeyType, ValueType, ValueTraits, HashFunctions>
RawKeyTranslator;
public:
typedef HashTableIteratorAdapter<HashTableType, ValueType> iterator;
typedef HashTableConstIteratorAdapter<HashTableType, ValueType> const_iterator;
void swap(HashMap&);
int size() const;
int capacity() const;
bool isEmpty() const;
// iterators iterate over pairs of keys and values
iterator begin();
iterator end();
const_iterator begin() const;
const_iterator end() const;
iterator find(const KeyType&);
iterator find(RawKeyType);
const_iterator find(const KeyType&) const;
const_iterator find(RawKeyType) const;
bool contains(const KeyType&) const;
bool contains(RawKeyType) const;
MappedType get(const KeyType&) const;
MappedType get(RawKeyType) const;
MappedType inlineGet(RawKeyType) const;
// replaces value but not key if key is already present
// return value is a pair of the iterator to the key location,
// and a boolean that's true if a new value was actually added
pair<iterator, bool> set(const KeyType&, const MappedType&);
pair<iterator, bool> set(RawKeyType, const MappedType&);
// does nothing if key is already present
// return value is a pair of the iterator to the key location,
// and a boolean that's true if a new value was actually added
pair<iterator, bool> add(const KeyType&, const MappedType&);
pair<iterator, bool> add(RawKeyType, const MappedType&);
void remove(const KeyType&);
void remove(RawKeyType);
void remove(iterator);
void clear();
MappedType take(const KeyType&); // efficient combination of get with remove
MappedType take(RawKeyType); // efficient combination of get with remove
private:
pair<iterator, bool> inlineAdd(const KeyType&, const MappedType&);
pair<iterator, bool> inlineAdd(RawKeyType, const MappedType&);
HashTableType m_impl;
};
template<typename T, typename U, typename V, typename W, typename X>
inline void HashMap<RefPtr<T>, U, V, W, X>::swap(HashMap& other)
{
m_impl.swap(other.m_impl);
}
template<typename T, typename U, typename V, typename W, typename X>
inline int HashMap<RefPtr<T>, U, V, W, X>::size() const
{
return m_impl.size();
}
template<typename T, typename U, typename V, typename W, typename X>
inline int HashMap<RefPtr<T>, U, V, W, X>::capacity() const
{
return m_impl.capacity();
}
template<typename T, typename U, typename V, typename W, typename X>
inline bool HashMap<RefPtr<T>, U, V, W, X>::isEmpty() const
{
return m_impl.isEmpty();
}
template<typename T, typename U, typename V, typename W, typename X>
inline typename HashMap<RefPtr<T>, U, V, W, X>::iterator HashMap<RefPtr<T>, U, V, W, X>::begin()
{
return m_impl.begin();
}
template<typename T, typename U, typename V, typename W, typename X>
inline typename HashMap<RefPtr<T>, U, V, W, X>::iterator HashMap<RefPtr<T>, U, V, W, X>::end()
{
return m_impl.end();
}
template<typename T, typename U, typename V, typename W, typename X>
inline typename HashMap<RefPtr<T>, U, V, W, X>::const_iterator HashMap<RefPtr<T>, U, V, W, X>::begin() const
{
return m_impl.begin();
}
template<typename T, typename U, typename V, typename W, typename X>
inline typename HashMap<RefPtr<T>, U, V, W, X>::const_iterator HashMap<RefPtr<T>, U, V, W, X>::end() const
{
return m_impl.end();
}
template<typename T, typename U, typename V, typename W, typename X>
inline typename HashMap<RefPtr<T>, U, V, W, X>::iterator HashMap<RefPtr<T>, U, V, W, X>::find(const KeyType& key)
{
return m_impl.find(key);
}
template<typename T, typename U, typename V, typename W, typename X>
inline typename HashMap<RefPtr<T>, U, V, W, X>::iterator HashMap<RefPtr<T>, U, V, W, X>::find(RawKeyType key)
{
return m_impl.template find<RawKeyType, RawKeyTranslator>(key);
}
template<typename T, typename U, typename V, typename W, typename X>
inline typename HashMap<RefPtr<T>, U, V, W, X>::const_iterator HashMap<RefPtr<T>, U, V, W, X>::find(const KeyType& key) const
{
return m_impl.find(key);
}
template<typename T, typename U, typename V, typename W, typename X>
inline typename HashMap<RefPtr<T>, U, V, W, X>::const_iterator HashMap<RefPtr<T>, U, V, W, X>::find(RawKeyType key) const
{
return m_impl.template find<RawKeyType, RawKeyTranslator>(key);
}
template<typename T, typename U, typename V, typename W, typename X>
inline bool HashMap<RefPtr<T>, U, V, W, X>::contains(const KeyType& key) const
{
return m_impl.contains(key);
}
template<typename T, typename U, typename V, typename W, typename X>
inline bool HashMap<RefPtr<T>, U, V, W, X>::contains(RawKeyType key) const
{
return m_impl.template contains<RawKeyType, RawKeyTranslator>(key);
}
template<typename T, typename U, typename V, typename W, typename X>
inline pair<typename HashMap<RefPtr<T>, U, V, W, X>::iterator, bool>
HashMap<RefPtr<T>, U, V, W, X>::inlineAdd(const KeyType& key, const MappedType& mapped)
{
typedef HashMapTranslator<ValueType, ValueTraits, HashFunctions> TranslatorType;
return m_impl.template add<KeyType, MappedType, TranslatorType>(key, mapped);
}
template<typename T, typename U, typename V, typename W, typename X>
inline pair<typename HashMap<RefPtr<T>, U, V, W, X>::iterator, bool>
HashMap<RefPtr<T>, U, V, W, X>::inlineAdd(RawKeyType key, const MappedType& mapped)
{
return m_impl.template add<RawKeyType, MappedType, RawKeyTranslator>(key, mapped);
}
template<typename T, typename U, typename V, typename W, typename X>
pair<typename HashMap<RefPtr<T>, U, V, W, X>::iterator, bool>
HashMap<RefPtr<T>, U, V, W, X>::set(const KeyType& key, const MappedType& mapped)
{
pair<iterator, bool> result = inlineAdd(key, mapped);
if (!result.second) {
// add call above didn't change anything, so set the mapped value
result.first->second = mapped;
}
return result;
}
template<typename T, typename U, typename V, typename W, typename X>
pair<typename HashMap<RefPtr<T>, U, V, W, X>::iterator, bool>
HashMap<RefPtr<T>, U, V, W, X>::set(RawKeyType key, const MappedType& mapped)
{
pair<iterator, bool> result = inlineAdd(key, mapped);
if (!result.second) {
// add call above didn't change anything, so set the mapped value
result.first->second = mapped;
}
return result;
}
template<typename T, typename U, typename V, typename W, typename X>
pair<typename HashMap<RefPtr<T>, U, V, W, X>::iterator, bool>
HashMap<RefPtr<T>, U, V, W, X>::add(const KeyType& key, const MappedType& mapped)
{
return inlineAdd(key, mapped);
}
template<typename T, typename U, typename V, typename W, typename X>
pair<typename HashMap<RefPtr<T>, U, V, W, X>::iterator, bool>
HashMap<RefPtr<T>, U, V, W, X>::add(RawKeyType key, const MappedType& mapped)
{
return inlineAdd(key, mapped);
}
template<typename T, typename U, typename V, typename W, typename MappedTraits>
typename HashMap<RefPtr<T>, U, V, W, MappedTraits>::MappedType
HashMap<RefPtr<T>, U, V, W, MappedTraits>::get(const KeyType& key) const
{
ValueType* entry = const_cast<HashTableType&>(m_impl).lookup(key);
if (!entry)
return MappedTraits::emptyValue();
return entry->second;
}
template<typename T, typename U, typename V, typename W, typename MappedTraits>
typename HashMap<RefPtr<T>, U, V, W, MappedTraits>::MappedType
inline HashMap<RefPtr<T>, U, V, W, MappedTraits>::inlineGet(RawKeyType key) const
{
ValueType* entry = const_cast<HashTableType&>(m_impl).template lookup<RawKeyType, RawKeyTranslator>(key);
if (!entry)
return MappedTraits::emptyValue();
return entry->second;
}
template<typename T, typename U, typename V, typename W, typename MappedTraits>
typename HashMap<RefPtr<T>, U, V, W, MappedTraits>::MappedType
HashMap<RefPtr<T>, U, V, W, MappedTraits>::get(RawKeyType key) const
{
return inlineGet(key);
}
template<typename T, typename U, typename V, typename W, typename X>
inline void HashMap<RefPtr<T>, U, V, W, X>::remove(iterator it)
{
if (it.m_impl == m_impl.end())
return;
m_impl.internalCheckTableConsistency();
m_impl.removeWithoutEntryConsistencyCheck(it.m_impl);
}
template<typename T, typename U, typename V, typename W, typename X>
inline void HashMap<RefPtr<T>, U, V, W, X>::remove(const KeyType& key)
{
remove(find(key));
}
template<typename T, typename U, typename V, typename W, typename X>
inline void HashMap<RefPtr<T>, U, V, W, X>::remove(RawKeyType key)
{
remove(find(key));
}
template<typename T, typename U, typename V, typename W, typename X>
inline void HashMap<RefPtr<T>, U, V, W, X>::clear()
{
m_impl.clear();
}
template<typename T, typename U, typename V, typename W, typename MappedTraits>
typename HashMap<RefPtr<T>, U, V, W, MappedTraits>::MappedType
HashMap<RefPtr<T>, U, V, W, MappedTraits>::take(const KeyType& key)
{
// This can probably be made more efficient to avoid ref/deref churn.
iterator it = find(key);
if (it == end())
return MappedTraits::emptyValue();
typename HashMap<RefPtr<T>, U, V, W, MappedTraits>::MappedType result = it->second;
remove(it);
return result;
}
template<typename T, typename U, typename V, typename W, typename MappedTraits>
typename HashMap<RefPtr<T>, U, V, W, MappedTraits>::MappedType
HashMap<RefPtr<T>, U, V, W, MappedTraits>::take(RawKeyType key)
{
// This can probably be made more efficient to avoid ref/deref churn.
iterator it = find(key);
if (it == end())
return MappedTraits::emptyValue();
typename HashMap<RefPtr<T>, U, V, W, MappedTraits>::MappedType result = it->second;
remove(it);
return result;
}
} // namespace WTF
|
