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 jdk.internal.misc;
27
28 import java.lang.invoke.MethodHandle;
29 import java.lang.invoke.MethodHandles;
30 import java.lang.invoke.MethodType;
31 import java.nio.channels.FileChannel.MapMode;
32
33 /**
34 * JDK-specific map modes implemented in java.base.
35 */
36 public class ExtendedMapMode {
37
38 static final MethodHandle MAP_MODE_CONSTRUCTOR;
39
40 static {
41 try {
42 var lookup = MethodHandles.privateLookupIn(MapMode.class, MethodHandles.lookup());
43 var methodType = MethodType.methodType(void.class, String.class);
44 MAP_MODE_CONSTRUCTOR = lookup.findConstructor(MapMode.class, methodType);
45 } catch (Exception e) {
46 throw new InternalError(e);
47 }
48 }
49
50 public static final MapMode READ_ONLY_SYNC = newMapMode("READ_ONLY_SYNC");
51
52 public static final MapMode READ_WRITE_SYNC = newMapMode("READ_WRITE_SYNC");
53
54 private static MapMode newMapMode(String name) {
55 try {
56 return (MapMode) MAP_MODE_CONSTRUCTOR.invoke(name);
57 } catch (Throwable e) {
58 throw new InternalError(e);
59 }
60 }
61
62 private ExtendedMapMode() { }
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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 jdk.internal.misc;
27
28 import java.lang.invoke.MethodHandle;
29 import java.lang.invoke.MethodHandles;
30 import java.lang.invoke.MethodHandles.Lookup;
31 import java.lang.invoke.MethodType;
32 import java.nio.channels.FileChannel.MapMode;
33 import java.security.AccessController;
34 import java.security.PrivilegedExceptionAction;
35
36 /**
37 * JDK-specific map modes implemented in java.base.
38 */
39 public class ExtendedMapMode {
40
41 static final MethodHandle MAP_MODE_CONSTRUCTOR;
42 static {
43 try {
44 PrivilegedExceptionAction<Lookup> pae = () ->
45 MethodHandles.privateLookupIn(MapMode.class, MethodHandles.lookup());
46 Lookup lookup = AccessController.doPrivileged(pae);
47 var methodType = MethodType.methodType(void.class, String.class);
48 MAP_MODE_CONSTRUCTOR = lookup.findConstructor(MapMode.class, methodType);
49 } catch (Exception e) {
50 throw new InternalError(e);
51 }
52 }
53
54 public static final MapMode READ_ONLY_SYNC = newMapMode("READ_ONLY_SYNC");
55
56 public static final MapMode READ_WRITE_SYNC = newMapMode("READ_WRITE_SYNC");
57
58 private static MapMode newMapMode(String name) {
59 try {
60 return (MapMode) MAP_MODE_CONSTRUCTOR.invoke(name);
61 } catch (Throwable e) {
62 throw new InternalError(e);
63 }
64 }
65
66 private ExtendedMapMode() { }
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