| /* |
| * Copyright (C) 2008 Apple Inc. All Rights Reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #ifndef WTFThreadData_h |
| #define WTFThreadData_h |
| |
| #include <wtf/HashMap.h> |
| #include <wtf/HashSet.h> |
| #include <wtf/Noncopyable.h> |
| #include <wtf/StackBounds.h> |
| #include <wtf/text/StringHash.h> |
| |
| // This was ENABLE(WORKERS) in WebCore, but this is not defined when compiling JSC. |
| // However this check was not correct anyway, re this comment: |
| // // FIXME: Workers are not necessarily the only feature that make per-thread global data necessary. |
| // // We need to check for e.g. database objects manipulating strings on secondary threads. |
| // Always enabling this is safe, and should be a better option until we can come up |
| // with a better define. |
| #define WTFTHREADDATA_MULTITHREADED 1 |
| |
| #if WTFTHREADDATA_MULTITHREADED |
| #include <wtf/ThreadSpecific.h> |
| #include <wtf/Threading.h> |
| #endif |
| |
| #if USE(JSC) |
| // FIXME: This is a temporary layering violation while we move more string code to WTF. |
| namespace JSC { |
| |
| typedef HashMap<const char*, RefPtr<StringImpl>, PtrHash<const char*> > LiteralIdentifierTable; |
| |
| class IdentifierTable { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| ~IdentifierTable(); |
| |
| std::pair<HashSet<StringImpl*>::iterator, bool> add(StringImpl* value); |
| template<typename U, typename V> |
| std::pair<HashSet<StringImpl*>::iterator, bool> add(U value); |
| |
| bool remove(StringImpl* r) |
| { |
| HashSet<StringImpl*>::iterator iter = m_table.find(r); |
| if (iter == m_table.end()) |
| return false; |
| m_table.remove(iter); |
| return true; |
| } |
| |
| LiteralIdentifierTable& literalTable() { return m_literalTable; } |
| |
| private: |
| HashSet<StringImpl*> m_table; |
| LiteralIdentifierTable m_literalTable; |
| }; |
| |
| } |
| #endif |
| |
| namespace WTF { |
| |
| class AtomicStringTable; |
| |
| typedef void (*AtomicStringTableDestructor)(AtomicStringTable*); |
| |
| class WTFThreadData { |
| WTF_MAKE_NONCOPYABLE(WTFThreadData); |
| public: |
| WTFThreadData(); |
| ~WTFThreadData(); |
| |
| AtomicStringTable* atomicStringTable() |
| { |
| return m_atomicStringTable; |
| } |
| |
| #if USE(JSC) |
| JSC::IdentifierTable* currentIdentifierTable() |
| { |
| return m_currentIdentifierTable; |
| } |
| |
| JSC::IdentifierTable* setCurrentIdentifierTable(JSC::IdentifierTable* identifierTable) |
| { |
| JSC::IdentifierTable* oldIdentifierTable = m_currentIdentifierTable; |
| m_currentIdentifierTable = identifierTable; |
| return oldIdentifierTable; |
| } |
| |
| void resetCurrentIdentifierTable() |
| { |
| m_currentIdentifierTable = m_defaultIdentifierTable; |
| } |
| |
| const StackBounds& stack() const |
| { |
| return m_stackBounds; |
| } |
| #endif |
| |
| private: |
| AtomicStringTable* m_atomicStringTable; |
| AtomicStringTableDestructor m_atomicStringTableDestructor; |
| |
| #if USE(JSC) |
| JSC::IdentifierTable* m_defaultIdentifierTable; |
| JSC::IdentifierTable* m_currentIdentifierTable; |
| StackBounds m_stackBounds; |
| #endif |
| |
| #if WTFTHREADDATA_MULTITHREADED |
| static JS_EXPORTDATA ThreadSpecific<WTFThreadData>* staticData; |
| #else |
| static JS_EXPORTDATA WTFThreadData* staticData; |
| #endif |
| friend WTFThreadData& wtfThreadData(); |
| friend class AtomicStringTable; |
| }; |
| |
| inline WTFThreadData& wtfThreadData() |
| { |
| #if WTFTHREADDATA_MULTITHREADED |
| // WRT WebCore: |
| // WTFThreadData is used on main thread before it could possibly be used |
| // on secondary ones, so there is no need for synchronization here. |
| // WRT JavaScriptCore: |
| // wtfThreadData() is initially called from initializeThreading(), ensuring |
| // this is initially called in a pthread_once locked context. |
| if (!WTFThreadData::staticData) |
| WTFThreadData::staticData = new ThreadSpecific<WTFThreadData>; |
| return **WTFThreadData::staticData; |
| #else |
| if (!WTFThreadData::staticData) { |
| WTFThreadData::staticData = static_cast<WTFThreadData*>(fastMalloc(sizeof(WTFThreadData))); |
| // WTFThreadData constructor indirectly uses staticData, so we need to set up the memory before invoking it. |
| new (WTFThreadData::staticData) WTFThreadData; |
| } |
| return *WTFThreadData::staticData; |
| #endif |
| } |
| |
| } // namespace WTF |
| |
| using WTF::WTFThreadData; |
| using WTF::wtfThreadData; |
| |
| #endif // WTFThreadData_h |