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/*
* Copyright (C) 2006 Apple Inc.
*
* 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.
*
*/
#ifndef AtomicStringImpl_h
#define AtomicStringImpl_h
#include <wtf/text/UniquedStringImpl.h>
namespace WTF {
class AtomicStringTable;
class AtomicStringImpl : public UniquedStringImpl {
public:
static RefPtr<AtomicStringImpl> lookUp(LChar* characters, unsigned length)
{
return lookUpInternal(characters, length);
}
static RefPtr<AtomicStringImpl> lookUp(UChar* characters, unsigned length)
{
return lookUpInternal(characters, length);
}
static RefPtr<AtomicStringImpl> lookUp(StringImpl* string)
{
if (!string || string->isAtomic())
return static_cast<AtomicStringImpl*>(string);
return lookUpSlowCase(*string);
}
static void remove(AtomicStringImpl*);
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> add(const LChar*);
ALWAYS_INLINE static RefPtr<AtomicStringImpl> add(const char* s) { return add(reinterpret_cast<const LChar*>(s)); };
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> add(const LChar*, unsigned length);
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> add(const UChar*, unsigned length);
ALWAYS_INLINE static RefPtr<AtomicStringImpl> add(const char* s, unsigned length) { return add(reinterpret_cast<const LChar*>(s), length); };
WTF_EXPORT_STRING_API static Ref<AtomicStringImpl> add(const UChar*, unsigned length, unsigned existingHash);
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> add(const UChar*);
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> add(StringImpl*, unsigned offset, unsigned length);
ALWAYS_INLINE static RefPtr<AtomicStringImpl> add(StringImpl* string)
{
if (!string)
return static_cast<AtomicStringImpl*>(string);
return add(*string);
}
WTF_EXPORT_STRING_API static Ref<AtomicStringImpl> addLiteral(const char* characters, unsigned length);
// Returns null if the input data contains an invalid UTF-8 sequence.
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> addUTF8(const char* start, const char* end);
#if USE(CF)
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> add(CFStringRef);
#endif
template<typename StringTableProvider>
ALWAYS_INLINE static RefPtr<AtomicStringImpl> addWithStringTableProvider(StringTableProvider& stringTableProvider, StringImpl* string)
{
if (!string)
return nullptr;
return add(*stringTableProvider.atomicStringTable(), *string);
}
#if !ASSERT_DISABLED
WTF_EXPORT_STRING_API static bool isInAtomicStringTable(StringImpl*);
#endif
private:
AtomicStringImpl() = delete;
ALWAYS_INLINE static Ref<AtomicStringImpl> add(StringImpl& string)
{
if (string.isAtomic()) {
ASSERT_WITH_MESSAGE(!string.length() || isInAtomicStringTable(&string), "The atomic string comes from an other thread!");
return static_cast<AtomicStringImpl&>(string);
}
return addSlowCase(string);
}
ALWAYS_INLINE static Ref<AtomicStringImpl> add(AtomicStringTable& stringTable, StringImpl& string)
{
if (string.isAtomic()) {
ASSERT_WITH_MESSAGE(!string.length() || isInAtomicStringTable(&string), "The atomic string comes from an other thread!");
return static_cast<AtomicStringImpl&>(string);
}
return addSlowCase(stringTable, string);
}
WTF_EXPORT_STRING_API static Ref<AtomicStringImpl> addSlowCase(StringImpl&);
WTF_EXPORT_STRING_API static Ref<AtomicStringImpl> addSlowCase(AtomicStringTable&, StringImpl&);
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> lookUpSlowCase(StringImpl&);
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> lookUpInternal(const LChar*, unsigned length);
WTF_EXPORT_STRING_API static RefPtr<AtomicStringImpl> lookUpInternal(const UChar*, unsigned length);
};
#if !ASSERT_DISABLED
// AtomicStringImpls created from StaticASCIILiteral will ASSERT
// in the generic ValueCheck<T>::checkConsistency
// as they are not allocated by fastMalloc.
// We don't currently have any way to detect that case
// so we ignore the consistency check for all AtomicStringImpls*.
template<> struct
ValueCheck<AtomicStringImpl*> {
static void checkConsistency(const AtomicStringImpl*) { }
};
template<> struct
ValueCheck<const AtomicStringImpl*> {
static void checkConsistency(const AtomicStringImpl*) { }
};
#endif
}
using WTF::AtomicStringImpl;
#endif
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