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A library that offers data structures allocated off the java heap.
/*
* Copyright 2015 Terracotta, Inc., a Software AG company.
*
* 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 at
*
* 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 org.terracotta.offheapstore.paging;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
/**
*
* @author Chris Dennis
*/
public class Page {
private final ByteBuffer buffer;
private final OffHeapStorageArea binding;
private final int index;
private final int address;
private boolean freeable;
public Page(ByteBuffer buffer, OffHeapStorageArea binding) {
this.buffer = buffer;
this.binding = binding;
this.index = -1;
this.address = -1;
this.freeable = false;
}
public Page(ByteBuffer buffer, int index, int address, OffHeapStorageArea binding) {
this.buffer = buffer;
this.binding = binding;
this.index = index;
this.address = address;
this.freeable = true;
}
public ByteBuffer asByteBuffer() {
return buffer;
}
public IntBuffer asIntBuffer() {
return buffer.asIntBuffer();
}
public int size() {
if (buffer == null) {
return 0;
} else {
return buffer.capacity();
}
}
public int index() {
return index;
}
public int address() {
return address;
}
public OffHeapStorageArea binding() {
return binding;
}
synchronized boolean isFreeable() {
if (freeable) {
freeable = false;
return true;
} else {
return false;
}
}
}
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