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Copy pathSuperRegion.h
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58 lines (47 loc) · 1.97 KB
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/*
* 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 SuperRegion_h
#define SuperRegion_h
#include <wtf/MetaAllocator.h>
#include <wtf/PageBlock.h>
#include <wtf/PageReservation.h>
namespace JSC {
class VM;
class SuperRegion : public WTF::MetaAllocator {
public:
SuperRegion();
virtual ~SuperRegion();
protected:
virtual void* allocateNewSpace(size_t&) override;
virtual void notifyNeedPage(void*) override;
virtual void notifyPageIsFree(void*) override;
private:
static const uint64_t s_fixedHeapMemoryPoolSize;
static void* getAlignedBase(PageReservation&);
PageReservation m_reservation;
void* m_reservationBase;
};
} // namespace JSC
#endif // SuperRegion_h