/* * Copyright (C) 2012 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 WeakSet_h #define WeakSet_h #include "WeakBlock.h" namespace JSC { class Heap; class WeakImpl; class WeakSet { public: WeakSet(Heap*); void finalizeAll(); ~WeakSet(); static WeakImpl* allocate(JSValue, WeakHandleOwner* = 0, void* context = 0); static void deallocate(WeakImpl*); void visitLiveWeakImpls(HeapRootVisitor&); void visitDeadWeakImpls(HeapRootVisitor&); void sweep(); void resetAllocator(); void shrink(); private: JS_EXPORT_PRIVATE WeakBlock::FreeCell* findAllocator(); WeakBlock::FreeCell* tryFindAllocator(); WeakBlock::FreeCell* addAllocator(); void removeAllocator(WeakBlock*); WeakBlock::FreeCell* m_allocator; WeakBlock* m_nextAllocator; DoublyLinkedList<WeakBlock> m_blocks; Heap* m_heap; }; inline WeakSet::WeakSet(Heap* heap) : m_allocator(0) , m_nextAllocator(0) , m_heap(heap) { } inline void WeakSet::deallocate(WeakImpl* weakImpl) { weakImpl->setState(WeakImpl::Deallocated); } } // namespace JSC #endif // WeakSet_h