net.openhft.chronicle.hash.impl.PersistedChronicleHashResources Maven / Gradle / Ivy
/*
* Copyright 2012-2018 Chronicle Map Contributors
*
* 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 net.openhft.chronicle.hash.impl;
import net.openhft.chronicle.core.OS;
import net.openhft.chronicle.hash.impl.util.CanonicalRandomAccessFiles;
import java.io.File;
import java.io.IOException;
public final class PersistedChronicleHashResources extends ChronicleHashResources {
private File file;
public PersistedChronicleHashResources(File file) {
this.file = file;
OS.memory().storeFence(); // Emulate final semantics of the file field
}
@Override
void releaseMemoryResource(MemoryResource mapping) throws IOException {
OS.unmap(mapping.address, mapping.size);
}
@Override
Throwable releaseExtraSystemResources() {
if (file == null)
return null;
Throwable thrown = null;
try {
CanonicalRandomAccessFiles.release(file);
file = null;
} catch (Throwable t) {
thrown = t;
}
return thrown;
}
}