2 * Copyright (C) 2010 Apple Inc. All Rights Reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "StringStatics.h"
29 #ifdef SKIP_STATIC_CONSTRUCTORS_ON_GCC
30 #define ATOMICSTRING_HIDE_GLOBALS 1
31 #define STRING_HIDE_GLOBALS 1
34 #include "AtomicString.h"
35 #include "StringImpl.h"
36 #include "wtf/DynamicAnnotations.h"
37 #include "wtf/MainThread.h"
38 #include "wtf/StaticConstructors.h"
42 StringImpl* StringImpl::empty()
44 DEFINE_STATIC_LOCAL(StringImpl, emptyString, (ConstructEmptyString));
45 WTF_ANNOTATE_BENIGN_RACE(&emptyString, "Benign race on StringImpl::emptyString reference counter");
49 WTF_EXPORT DEFINE_GLOBAL(AtomicString, nullAtom)
50 WTF_EXPORT DEFINE_GLOBAL(AtomicString, emptyAtom)
51 WTF_EXPORT DEFINE_GLOBAL(AtomicString, starAtom)
52 WTF_EXPORT DEFINE_GLOBAL(AtomicString, xmlAtom)
53 WTF_EXPORT DEFINE_GLOBAL(AtomicString, xmlnsAtom)
54 WTF_EXPORT DEFINE_GLOBAL(AtomicString, xlinkAtom)
56 // This is not an AtomicString because it is unlikely to be used as an
57 // event/element/attribute name, so it shouldn't pollute the AtomicString hash
59 WTF_EXPORT DEFINE_GLOBAL(String, xmlnsWithColon)
61 NEVER_INLINE unsigned StringImpl::hashSlowCase() const
64 setHash(StringHasher::computeHashAndMaskTop8Bits(characters8(), m_length));
66 setHash(StringHasher::computeHashAndMaskTop8Bits(characters16(), m_length));
67 return existingHash();
70 void AtomicString::init()
72 ASSERT(isMainThread());
74 new (NotNull, (void*)&nullAtom) AtomicString;
75 new (NotNull, (void*)&emptyAtom) AtomicString("");
78 void StringStatics::init()
80 ASSERT(isMainThread());
82 // FIXME: These should be allocated at compile time.
83 new (NotNull, (void*)&starAtom) AtomicString("*", AtomicString::ConstructFromLiteral);
84 new (NotNull, (void*)&xmlAtom) AtomicString("xml", AtomicString::ConstructFromLiteral);
85 new (NotNull, (void*)&xmlnsAtom) AtomicString("xmlns", AtomicString::ConstructFromLiteral);
86 new (NotNull, (void*)&xlinkAtom) AtomicString("xlink", AtomicString::ConstructFromLiteral);
87 new (NotNull, (void*)&xmlnsWithColon) String("xmlns:");