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 
  25 #ifndef SHARE_VM_MEMORY_BLOCKOFFSETTABLE_HPP
  26 #define SHARE_VM_MEMORY_BLOCKOFFSETTABLE_HPP
  27 
  28 #include "memory/memRegion.hpp"
  29 #include "runtime/virtualspace.hpp"
  30 #include "utilities/globalDefinitions.hpp"
  31 
  32 // The CollectedHeap type requires subtypes to implement a method
  33 // "block_start".  For some subtypes, notably generational
  34 // systems using card-table-based write barriers, the efficiency of this
  35 // operation may be important.  Implementations of the "BlockOffsetArray"
  36 // class may be useful in providing such efficient implementations.
  37 //
  38 // BlockOffsetTable (abstract)
  39 //   - BlockOffsetArray (abstract)
  40 //     - BlockOffsetArrayNonContigSpace
  41 //     - BlockOffsetArrayContigSpace
  42 //
  43 
  44 class ContiguousSpace;
  45 
  46 //////////////////////////////////////////////////////////////////////////
  47 // The BlockOffsetTable "interface"
  48 //////////////////////////////////////////////////////////////////////////
  49 class BlockOffsetTable VALUE_OBJ_CLASS_SPEC {

   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 
  25 #ifndef SHARE_VM_MEMORY_BLOCKOFFSETTABLE_HPP
  26 #define SHARE_VM_MEMORY_BLOCKOFFSETTABLE_HPP
  27 
  28 #include "memory/memRegion.hpp"
  29 #include "memory/virtualspace.hpp"
  30 #include "utilities/globalDefinitions.hpp"
  31 
  32 // The CollectedHeap type requires subtypes to implement a method
  33 // "block_start".  For some subtypes, notably generational
  34 // systems using card-table-based write barriers, the efficiency of this
  35 // operation may be important.  Implementations of the "BlockOffsetArray"
  36 // class may be useful in providing such efficient implementations.
  37 //
  38 // BlockOffsetTable (abstract)
  39 //   - BlockOffsetArray (abstract)
  40 //     - BlockOffsetArrayNonContigSpace
  41 //     - BlockOffsetArrayContigSpace
  42 //
  43 
  44 class ContiguousSpace;
  45 
  46 //////////////////////////////////////////////////////////////////////////
  47 // The BlockOffsetTable "interface"
  48 //////////////////////////////////////////////////////////////////////////
  49 class BlockOffsetTable VALUE_OBJ_CLASS_SPEC {