/* * Copyright (C) 2013 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 WriteBarrierBuffer_h #define WriteBarrierBuffer_h #include <wtf/FastMalloc.h> namespace JSC { class Heap; class JSCell; namespace FTL { class LowerDFGToLLVM; } class WriteBarrierBuffer { friend class FTL::LowerDFGToLLVM; public: WriteBarrierBuffer(unsigned capacity); ~WriteBarrierBuffer(); void add(JSCell*); void flush(Heap&); void reset(); static ptrdiff_t currentIndexOffset() { return OBJECT_OFFSETOF(WriteBarrierBuffer, m_currentIndex); } static ptrdiff_t capacityOffset() { return OBJECT_OFFSETOF(WriteBarrierBuffer, m_capacity); } static ptrdiff_t bufferOffset() { return OBJECT_OFFSETOF(WriteBarrierBuffer, m_buffer); } private: unsigned m_currentIndex; unsigned m_capacity; JSCell** m_buffer; }; } // namespace JSC #endif // WriteBarrierBuffer_h