src/java.base/windows/classes/sun/nio/ch/PendingIoCache.java

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rev 12972 : 8140606: Update library code to use internal Unsafe
Reviewed-by: duke


  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.nio.ch;
  27 
  28 import java.nio.channels.*;
  29 import java.util.*;
  30 import sun.misc.Unsafe;
  31 
  32 /**
  33  * Maintains a mapping of pending I/O requests (identified by the address of
  34  * an OVERLAPPED structure) to Futures.
  35  */
  36 
  37 class PendingIoCache {
  38     private static final Unsafe unsafe = Unsafe.getUnsafe();
  39     private static final int addressSize = unsafe.addressSize();
  40 
  41     private static int dependsArch(int value32, int value64) {
  42         return (addressSize == 4) ? value32 : value64;
  43     }
  44 
  45     /*
  46      * typedef struct _OVERLAPPED {
  47      *     DWORD  Internal;
  48      *     DWORD  InternalHigh;
  49      *     DWORD  Offset;
  50      *     DWORD  OffsetHigh;




  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.nio.ch;
  27 
  28 import java.nio.channels.*;
  29 import java.util.*;
  30 import jdk.internal.misc.Unsafe;
  31 
  32 /**
  33  * Maintains a mapping of pending I/O requests (identified by the address of
  34  * an OVERLAPPED structure) to Futures.
  35  */
  36 
  37 class PendingIoCache {
  38     private static final Unsafe unsafe = Unsafe.getUnsafe();
  39     private static final int addressSize = unsafe.addressSize();
  40 
  41     private static int dependsArch(int value32, int value64) {
  42         return (addressSize == 4) ? value32 : value64;
  43     }
  44 
  45     /*
  46      * typedef struct _OVERLAPPED {
  47      *     DWORD  Internal;
  48      *     DWORD  InternalHigh;
  49      *     DWORD  Offset;
  50      *     DWORD  OffsetHigh;