1/* 2 * Copyright (C) 2013 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef SuperRegion_h 27#define SuperRegion_h 28 29#include <wtf/MetaAllocator.h> 30#include <wtf/PageBlock.h> 31#include <wtf/PageReservation.h> 32 33namespace JSC { 34 35class VM; 36 37class SuperRegion : public WTF::MetaAllocator { 38public: 39 SuperRegion(); 40 virtual ~SuperRegion(); 41 42protected: 43 virtual void* allocateNewSpace(size_t&) override; 44 virtual void notifyNeedPage(void*) override; 45 virtual void notifyPageIsFree(void*) override; 46 47private: 48 static const uint64_t s_fixedHeapMemoryPoolSize; 49 50 static void* getAlignedBase(PageReservation&); 51 52 PageReservation m_reservation; 53 void* m_reservationBase; 54}; 55 56} // namespace JSC 57 58#endif // SuperRegion_h 59