src/hotspot/share/gc/z/zPreMappedMemory.hpp

/*
 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef SHARE_GC_Z_ZPREMAPPEDMEMORY_HPP
#define SHARE_GC_Z_ZPREMAPPEDMEMORY_HPP

#include "gc/z/zPhysicalMemory.hpp"
#include "gc/z/zVirtualMemory.hpp"
#include "memory/allocation.hpp"

class ZPage;

class ZPreMappedMemory {
private:
  ZVirtualMemory  _vmem;
  ZPhysicalMemory _pmem;
  bool            _initialized;

public:
  ZPreMappedMemory(ZVirtualMemoryManager &vmm, ZPhysicalMemoryManager &pmm, size_t size);

  bool is_initialized() const;

  ZPhysicalMemory& physical_memory();
  const ZVirtualMemory& virtual_memory() const;

  size_t available() const;

  ZPage* alloc_page(uint8_t type, size_t size);

  void clear();
};

#endif // SHARE_GC_Z_ZPREMAPPEDMEMORY_HPP