| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * you may obtain a copy of the License from |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package edu.uci.ics.hyracks.storage.common.file; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import edu.uci.ics.hyracks.api.io.FileHandle; |
| |
| public class BufferedFileHandle { |
| private final int fileId; |
| private FileHandle handle; |
| private final AtomicInteger refCount; |
| |
| public BufferedFileHandle(int fileId, FileHandle handle) { |
| this.fileId = fileId; |
| this.handle = handle; |
| refCount = new AtomicInteger(); |
| } |
| |
| public int getFileId() { |
| return fileId; |
| } |
| |
| public FileHandle getFileHandle() { |
| return handle; |
| } |
| |
| public int incReferenceCount() { |
| return refCount.incrementAndGet(); |
| } |
| |
| public int decReferenceCount() { |
| return refCount.decrementAndGet(); |
| } |
| |
| public int getReferenceCount() { |
| return refCount.get(); |
| } |
| |
| public long getDiskPageId(int pageId) { |
| return getDiskPageId(fileId, pageId); |
| } |
| |
| public static long getDiskPageId(int fileId, int pageId) { |
| return (((long) fileId) << 32) + pageId; |
| } |
| |
| public static int getFileId(long dpid) { |
| return (int) ((dpid >> 32) & 0xffffffff); |
| } |
| |
| public static int getPageId(long dpid) { |
| return (int) (dpid & 0xffffffff); |
| } |
| } |