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/*
* Copyright (C) 2011 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. ``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
* 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 CopiedBlock_h
#define CopiedBlock_h
#include "HeapBlock.h"
#include "JSValue.h"
#include "JSValueInlineMethods.h"
namespace JSC {
class CopiedSpace;
class CopiedBlock : public HeapBlock {
friend class CopiedSpace;
friend class CopiedAllocator;
public:
CopiedBlock(PageAllocationAligned& allocation)
: HeapBlock(allocation)
, m_offset(m_payload)
, m_isPinned(false)
{
ASSERT(is8ByteAligned(static_cast<void*>(m_payload)));
#if USE(JSVALUE64)
memset(static_cast<void*>(m_payload), 0, static_cast<size_t>((reinterpret_cast<char*>(this) + allocation.size()) - m_payload));
#else
JSValue emptyValue;
JSValue* limit = reinterpret_cast<JSValue*>(reinterpret_cast<char*>(this) + allocation.size());
for (JSValue* currentValue = reinterpret_cast<JSValue*>(m_payload); currentValue < limit; currentValue++)
*currentValue = emptyValue;
#endif
}
private:
void* m_offset;
uintptr_t m_isPinned;
uintptr_t m_padding;
uintptr_t m_dummy;
char m_payload[1];
};
} // namespace JSC
#endif
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