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_GC_G1_PTRQUEUE_HPP
  26 #define SHARE_VM_GC_G1_PTRQUEUE_HPP
  27 
  28 #include "memory/allocation.hpp"

  29 #include "utilities/sizes.hpp"
  30 
  31 // There are various techniques that require threads to be able to log
  32 // addresses.  For example, a generational write barrier might log
  33 // the addresses of modified old-generation objects.  This type supports
  34 // this operation.
  35 
  36 class BufferNode;
  37 class PtrQueueSet;
  38 class PtrQueue VALUE_OBJ_CLASS_SPEC {
  39   friend class VMStructs;
  40 
  41   // Noncopyable - not defined.
  42   PtrQueue(const PtrQueue&);
  43   PtrQueue& operator=(const PtrQueue&);
  44 
  45   // The ptr queue set to which this queue belongs.
  46   PtrQueueSet* const _qset;
  47 
  48   // Whether updates should be logged.

   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_GC_G1_PTRQUEUE_HPP
  26 #define SHARE_VM_GC_G1_PTRQUEUE_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "utilities/align.hpp"
  30 #include "utilities/sizes.hpp"
  31 
  32 // There are various techniques that require threads to be able to log
  33 // addresses.  For example, a generational write barrier might log
  34 // the addresses of modified old-generation objects.  This type supports
  35 // this operation.
  36 
  37 class BufferNode;
  38 class PtrQueueSet;
  39 class PtrQueue VALUE_OBJ_CLASS_SPEC {
  40   friend class VMStructs;
  41 
  42   // Noncopyable - not defined.
  43   PtrQueue(const PtrQueue&);
  44   PtrQueue& operator=(const PtrQueue&);
  45 
  46   // The ptr queue set to which this queue belongs.
  47   PtrQueueSet* const _qset;
  48 
  49   // Whether updates should be logged.