/* * 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 CopyVisitor_h #define CopyVisitor_h #include "CopiedSpace.h" namespace JSC { class GCThreadSharedData; class JSCell; class CopyVisitor { public: CopyVisitor(GCThreadSharedData&); void copyFromShared(); void startCopying(); void doneCopying(); // Low-level API for copying, appropriate for cases where the object's heap references // are discontiguous or if the object occurs frequently enough that you need to focus on // performance. Use this with care as it is easy to shoot yourself in the foot. bool checkIfShouldCopy(void*); void* allocateNewSpace(size_t); void didCopy(void*, size_t); private: void* allocateNewSpaceSlow(size_t); void visitItem(CopyWorklistItem); GCThreadSharedData& m_shared; CopiedAllocator m_copiedAllocator; }; } // namespace JSC #endif