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/*
* 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 visitCell(JSCell*);
GCThreadSharedData& m_shared;
CopiedAllocator m_copiedAllocator;
};
} // namespace JSC
#endif
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