/*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information regarding
* copyright ownership. The ASF licenses this file to You 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.apache.geode.internal.offheap;
/**
* Basic size and usage information about an off-heap memory block under inspection. For test
* validation only.
*
* @since Geode 1.0
*/
public interface MemoryBlock {
public enum State {
/** Unused fragment (not used and not in a free list) */
UNUSED,
/** Allocated chunk currently in use */
ALLOCATED,
/** Deallocated chunk currently in a free list */
DEALLOCATED
}
public State getState();
/**
* Returns the unsafe memory address of the first byte of this block.
*/
public long getAddress();
/**
* Returns the size of this memory block in bytes.
*/
public int getBlockSize();
/**
* Returns the next memory block immediately after this one.
*/
public MemoryBlock getNextBlock();
/**
* Returns the identifier of which slab contains this block.
*/
public int getSlabId();
/**
* Returns the identifier of which free list contains this block.
*/
public int getFreeListId();
public int getRefCount();
public String getDataType();
public boolean isSerialized();
public boolean isCompressed();
public Object getDataValue();
}