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 package sun.jvm.hotspot.utilities;
26
27 /** A BitMap implementing the BitMapInterface. */
28 public class BitMapSegmented implements BitMapInterface {
29 private static final int SegmentSizeBits = 30;
30 private static final int SegmentSize = 1 << (SegmentSizeBits - 1);
31
32 public BitMapSegmented(long sizeInBits) {
33 this.size = sizeInBits;
34
35 if (sizeInBits == 0) {
36 segmentBitMaps = new BitMap[0];
37 return;
38 }
39
40 int lastSegmentSize = (int)(sizeInBits % SegmentSize);
41
42 int segments = segmentIndex(sizeInBits - 1) + 1;
43 int completeSegments = segments - ((lastSegmentSize != 0) ? 1 : 0);
44
45 segmentBitMaps = new BitMap[segments];
46
47 for (int i = 0; i < completeSegments; i++) {
48 segmentBitMaps[i] = new BitMap(SegmentSize);
49 }
50
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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 package sun.jvm.hotspot.utilities;
26
27 /** A BitMap implementing the BitMapInterface. */
28 public class BitMapSegmented implements BitMapInterface {
29 public static final int SegmentSizeBits = 4;
30 public static final int SegmentSize = 1 << (SegmentSizeBits - 1);
31
32 public BitMapSegmented(long sizeInBits) {
33 this.size = sizeInBits;
34
35 if (sizeInBits == 0) {
36 segmentBitMaps = new BitMap[0];
37 return;
38 }
39
40 int lastSegmentSize = (int)(sizeInBits % SegmentSize);
41
42 int segments = segmentIndex(sizeInBits - 1) + 1;
43 int completeSegments = segments - ((lastSegmentSize != 0) ? 1 : 0);
44
45 segmentBitMaps = new BitMap[segments];
46
47 for (int i = 0; i < completeSegments; i++) {
48 segmentBitMaps[i] = new BitMap(SegmentSize);
49 }
50
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