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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef WTF_AtomicStringTable_h | 5 #ifndef WTF_AtomicStringTable_h |
| 6 #define WTF_AtomicStringTable_h | 6 #define WTF_AtomicStringTable_h |
| 7 | 7 |
| 8 #include "wtf/Allocator.h" | 8 #include "wtf/Allocator.h" |
| 9 #include "wtf/HashSet.h" | 9 #include "wtf/HashSet.h" |
| 10 #include "wtf/WTFExport.h" | |
| 11 #include "wtf/WTFThreadData.h" | |
| 10 #include "wtf/text/StringHash.h" | 12 #include "wtf/text/StringHash.h" |
| 11 #include "wtf/text/StringImpl.h" | 13 #include "wtf/text/StringImpl.h" |
| 12 | 14 |
| 13 namespace WTF { | 15 namespace WTF { |
| 14 | 16 |
| 15 // The underlying storage that keeps the map of unique AtomicStrings. This is | 17 // The underlying storage that keeps the map of unique AtomicStrings. This is |
| 16 // not thread safe and each WTFThreadData has one. | 18 // not thread safe and each WTFThreadData has one. |
| 17 class AtomicStringTable { | 19 class WTF_EXPORT AtomicStringTable final { |
| 18 USING_FAST_MALLOC(AtomicStringTable); | 20 USING_FAST_MALLOC(AtomicStringTable); |
| 19 WTF_MAKE_NONCOPYABLE(AtomicStringTable); | 21 WTF_MAKE_NONCOPYABLE(AtomicStringTable); |
| 20 public: | 22 public: |
| 21 AtomicStringTable(); | 23 AtomicStringTable(); |
| 22 ~AtomicStringTable(); | 24 ~AtomicStringTable(); |
| 23 | 25 |
| 24 StringImpl* addStringImpl(StringImpl*); | 26 // Gets the shared table for the current thread. |
| 27 static AtomicStringTable& instance() | |
| 28 { | |
| 29 return wtfThreadData().getAtomicStringTable(); | |
| 30 } | |
| 25 | 31 |
| 26 HashSet<StringImpl*>& table() { return m_table; } | 32 // Used by system initialization to preallocate enough storage for all of |
| 33 // the static strings. | |
| 34 void reserveCapacity(unsigned); | |
| 35 | |
| 36 // Adding a StringImpl. | |
| 37 StringImpl* add(StringImpl*); | |
| 38 PassRefPtr<StringImpl> add(StringImpl*, unsigned offset, unsigned length); | |
| 39 | |
| 40 // Adding an LChar. | |
| 41 PassRefPtr<StringImpl> add(const LChar*, unsigned length); | |
| 42 | |
| 43 // Adding a UChar. | |
| 44 PassRefPtr<StringImpl> add(const UChar*, unsigned length); | |
| 45 PassRefPtr<StringImpl> add(const UChar*, unsigned length, unsigned existingH ash); | |
| 46 PassRefPtr<StringImpl> add(const UChar*); | |
| 47 | |
| 48 // Adding UTF8. | |
| 49 // Returns null if the characters contain invalid utf8 sequences. | |
| 50 // Pass null for the charactersEnd to automatically detect the length. | |
| 51 PassRefPtr<StringImpl> addUTF8(const char* charactersStart, const char* char actersEnd); | |
| 52 | |
| 53 // Froming a StringImpl. This is for ~StringImpl, and should not be used | |
|
haraken
2016/06/29 23:50:02
Froming => Removing
| |
| 54 // directly. | |
| 55 void remove(StringImpl*); | |
| 27 | 56 |
| 28 private: | 57 private: |
| 58 template<typename T, typename HashTranslator> | |
| 59 inline PassRefPtr<StringImpl> addToStringTable(const T& value); | |
| 60 | |
| 61 template<typename CharacterType> | |
| 62 inline HashSet<StringImpl*>::iterator find(const StringImpl*); | |
| 63 | |
| 29 HashSet<StringImpl*> m_table; | 64 HashSet<StringImpl*> m_table; |
| 30 }; | 65 }; |
| 31 | 66 |
| 32 } // namespace WTF | 67 } // namespace WTF |
| 33 | 68 |
| 69 using WTF::AtomicStringTable; | |
| 70 | |
| 34 #endif | 71 #endif |
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