8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHSHAREDVARIABLES_HPP
  25 #define SHARE_GC_SHENANDOAH_SHENANDOAHSHAREDVARIABLES_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 #include "runtime/orderAccess.hpp"
  29 
  30 typedef jbyte ShenandoahSharedValue;
  31 
  32 // Needed for cooperation with generated code.
  33 STATIC_ASSERT(sizeof(ShenandoahSharedValue) == 1);
  34 
  35 typedef struct ShenandoahSharedFlag {
  36   enum {
  37     UNSET = 0,
  38     SET = 1
  39   };
  40 
  41   DEFINE_PAD_MINUS_SIZE(0, DEFAULT_CACHE_LINE_SIZE, sizeof(volatile ShenandoahSharedValue));
  42   volatile ShenandoahSharedValue value;
  43   DEFINE_PAD_MINUS_SIZE(1, DEFAULT_CACHE_LINE_SIZE, 0);
  44 
  45   ShenandoahSharedFlag() {
  46     unset();
  47   }
  48 

   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHSHAREDVARIABLES_HPP
  25 #define SHARE_GC_SHENANDOAH_SHENANDOAHSHAREDVARIABLES_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 #include "runtime/atomic.hpp"
  29 
  30 typedef jbyte ShenandoahSharedValue;
  31 
  32 // Needed for cooperation with generated code.
  33 STATIC_ASSERT(sizeof(ShenandoahSharedValue) == 1);
  34 
  35 typedef struct ShenandoahSharedFlag {
  36   enum {
  37     UNSET = 0,
  38     SET = 1
  39   };
  40 
  41   DEFINE_PAD_MINUS_SIZE(0, DEFAULT_CACHE_LINE_SIZE, sizeof(volatile ShenandoahSharedValue));
  42   volatile ShenandoahSharedValue value;
  43   DEFINE_PAD_MINUS_SIZE(1, DEFAULT_CACHE_LINE_SIZE, 0);
  44 
  45   ShenandoahSharedFlag() {
  46     unset();
  47   }
  48