1 /*

     2  * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 #ifndef SHARE_GC_Z_ZPREMAPPEDMEMORY_HPP

    25 #define SHARE_GC_Z_ZPREMAPPEDMEMORY_HPP

    26 

    27 #include "gc/z/zPhysicalMemory.hpp"

    28 #include "gc/z/zVirtualMemory.hpp"

    29 #include "memory/allocation.hpp"

    30 

    31 class ZPage;

    32 

    33 class ZPreMappedMemory {

    34 private:

    35   ZVirtualMemory  _vmem;

    36   ZPhysicalMemory _pmem;

    37   bool            _initialized;

    38 

    39 public:

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

    41 

    42   bool is_initialized() const;

    43 

    44   ZPhysicalMemory& physical_memory();

    45   const ZVirtualMemory& virtual_memory() const;

    46 

    47   size_t available() const;

    48 

    49   ZPage* alloc_page(uint8_t type, size_t size);

    50 

    51   void clear();

    52 };

    53 

    54 #endif // SHARE_GC_Z_ZPREMAPPEDMEMORY_HPP