1/* 2 * Copyright (C) 2010 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 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. 12 * 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 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "StringStatics.h" 28 29#ifdef SKIP_STATIC_CONSTRUCTORS_ON_GCC 30#define ATOMICSTRING_HIDE_GLOBALS 1 31#endif 32 33#include "AtomicString.h" 34#include "StringImpl.h" 35#include "wtf/DynamicAnnotations.h" 36#include "wtf/MainThread.h" 37#include "wtf/StaticConstructors.h" 38 39namespace WTF { 40 41StringImpl* StringImpl::empty() 42{ 43 DEFINE_STATIC_LOCAL(StringImpl, emptyString, (ConstructEmptyString)); 44 WTF_ANNOTATE_BENIGN_RACE(&emptyString, "Benign race on StringImpl::emptyString reference counter"); 45 return &emptyString; 46} 47 48WTF_EXPORT DEFINE_GLOBAL(AtomicString, nullAtom) 49WTF_EXPORT DEFINE_GLOBAL(AtomicString, emptyAtom) 50WTF_EXPORT DEFINE_GLOBAL(AtomicString, textAtom) 51WTF_EXPORT DEFINE_GLOBAL(AtomicString, commentAtom) 52WTF_EXPORT DEFINE_GLOBAL(AtomicString, starAtom) 53WTF_EXPORT DEFINE_GLOBAL(AtomicString, xmlAtom) 54WTF_EXPORT DEFINE_GLOBAL(AtomicString, xmlnsAtom) 55WTF_EXPORT DEFINE_GLOBAL(AtomicString, xlinkAtom) 56 57NEVER_INLINE unsigned StringImpl::hashSlowCase() const 58{ 59 if (is8Bit()) 60 setHash(StringHasher::computeHashAndMaskTop8Bits(characters8(), m_length)); 61 else 62 setHash(StringHasher::computeHashAndMaskTop8Bits(characters16(), m_length)); 63 return existingHash(); 64} 65 66void AtomicString::init() 67{ 68 ASSERT(isMainThread()); 69 70 new (NotNull, (void*)&nullAtom) AtomicString; 71 new (NotNull, (void*)&emptyAtom) AtomicString(""); 72} 73 74void StringStatics::init() 75{ 76 ASSERT(isMainThread()); 77 78 // FIXME: These should be allocated at compile time. 79 new (NotNull, (void*)&textAtom) AtomicString("#text", AtomicString::ConstructFromLiteral); 80 new (NotNull, (void*)&commentAtom) AtomicString("#comment", AtomicString::ConstructFromLiteral); 81 new (NotNull, (void*)&starAtom) AtomicString("*", AtomicString::ConstructFromLiteral); 82 new (NotNull, (void*)&xmlAtom) AtomicString("xml", AtomicString::ConstructFromLiteral); 83 new (NotNull, (void*)&xmlnsAtom) AtomicString("xmlns", AtomicString::ConstructFromLiteral); 84 new (NotNull, (void*)&xlinkAtom) AtomicString("xlink", AtomicString::ConstructFromLiteral); 85} 86 87} 88