jnr.ffi.provider.jffi.AllocatedDirectMemoryIO Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of cassandra-driver Show documentation
Show all versions of cassandra-driver Show documentation
Shaded version of DataStax Java Driver for Apache Cassandra
/*
* Copyright (C) 2008-2010 Wayne Meissner
*
* This file is part of the JNR project.
*
* 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 jnr.ffi.provider.jffi;
import jnr.ffi.Runtime;
import java.util.concurrent.atomic.AtomicBoolean;
class AllocatedDirectMemoryIO extends DirectMemoryIO {
private final AtomicBoolean allocated = new AtomicBoolean(true);
private final int size;
public AllocatedDirectMemoryIO(Runtime runtime, int size, boolean clear) {
super(runtime, IO.allocateMemory(size, clear));
this.size = size;
if (address() == 0L) {
throw new OutOfMemoryError("Failed to allocate " + size + " bytes");
}
}
@Override
public long size() {
return this.size;
}
@Override
public int hashCode() {
return super.hashCode();
}
@Override
public boolean equals(Object obj) {
if (obj instanceof AllocatedDirectMemoryIO) {
AllocatedDirectMemoryIO mem = (AllocatedDirectMemoryIO) obj;
return mem.size == size && mem.address() == address();
}
return super.equals(obj);
}
public final void dispose() {
if (allocated.getAndSet(false)) {
IO.freeMemory(address());
}
}
@Override
protected void finalize() throws Throwable {
try {
if (allocated.getAndSet(false)) {
IO.freeMemory(address());
}
} finally {
super.finalize();
}
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy