1 /*

     2  * Copyright (c) 2017, 2018, 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_ZADDRESSRANGEMAP_HPP

    25 #define SHARE_GC_Z_ZADDRESSRANGEMAP_HPP

    26 

    27 #include "memory/allocation.hpp"

    28 

    29 template<typename T, size_t AddressRangeShift>

    30 class ZAddressRangeMapIterator;

    31 

    32 template <typename T, size_t AddressRangeShift>

    33 class ZAddressRangeMap {

    34   friend class VMStructs;

    35   friend class ZAddressRangeMapIterator<T, AddressRangeShift>;

    36 

    37 private:

    38   T* const _map;

    39 

    40   size_t index_for_addr(uintptr_t addr) const;

    41   size_t size() const;

    42 

    43 public:

    44   ZAddressRangeMap();

    45   ~ZAddressRangeMap();

    46 

    47   T get(uintptr_t addr) const;

    48   void put(uintptr_t addr, T value);

    49 };

    50 

    51 template <typename T, size_t AddressRangeShift>

    52 class ZAddressRangeMapIterator : public StackObj {

    53 public:

    54   const ZAddressRangeMap<T, AddressRangeShift>* const _map;

    55   size_t                                              _next;

    56 

    57 public:

    58   ZAddressRangeMapIterator(const ZAddressRangeMap<T, AddressRangeShift>* map);

    59 

    60   bool next(T* value);

    61 };

    62 

    63 #endif // SHARE_GC_Z_ZADDRESSRANGEMAP_HPP