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/*
* Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8164900
* @summary Test for ExtendedOpenOption.DIRECT flag
* @requires (os.family == "linux" | os.family == "aix")
* @library /test/lib
* @build jdk.test.lib.Platform
* @run main/native DirectIOTest
*/
import java.io.*;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.channels.*;
import java.nio.channels.FileChannel;
import java.nio.file.Paths;
import java.nio.file.Path;
import java.nio.file.Files;
import jdk.test.lib.Platform;
import java.nio.file.FileStore;
import java.nio.file.StandardOpenOption;
import com.sun.nio.file.ExtendedOpenOption;
public class DirectIOTest {
private static final int BASE_SIZE = 4096;
private static int testWrite(Path p, long blockSize) throws Exception {
try (FileChannel fc = FileChannel.open(p, StandardOpenOption.WRITE,
ExtendedOpenOption.DIRECT)) {
int bs = (int)blockSize;
int size = Math.max(BASE_SIZE, bs);
int alignment = bs;
ByteBuffer src = ByteBuffer.allocateDirect(size + alignment - 1)
.alignedSlice(alignment);
assert src.capacity() != 0;
for (int j = 0; j < size; j++) {
src.put((byte)0);
}
src.flip();
fc.write(src);
return size;
}
}
private static int testRead(Path p, long blockSize) throws Exception {
try (FileChannel fc = FileChannel.open(p, ExtendedOpenOption.DIRECT)) {
int bs = (int)blockSize;
int size = Math.max(BASE_SIZE, bs);
int alignment = bs;
ByteBuffer dest = ByteBuffer.allocateDirect(size + alignment - 1)
.alignedSlice(alignment);
assert dest.capacity() != 0;
fc.read(dest);
return size;
}
}
public static Path createTempFile() throws IOException {
return Files.createTempFile(
Paths.get(System.getProperty("test.dir", ".")), "test", null);
}
private static boolean isFileInCache(int size, Path p) {
String path = p.toString();
return isFileInCache0(size, path);
}
private static native boolean isFileInCache0(int size, String path);
public static void main(String[] args) throws Exception {
Path p = createTempFile();
long blockSize = Files.getFileStore(p).getBlockSize();
System.loadLibrary("DirectIO");
try {
int size = testWrite(p, blockSize);
if (isFileInCache(size, p)) {
throw new RuntimeException("DirectIO is not working properly with "
+ "write. File still exists in cache!");
}
size = testRead(p, blockSize);
if (isFileInCache(size, p)) {
throw new RuntimeException("DirectIO is not working properly with "
+ "read. File still exists in cache!");
}
} finally {
Files.delete(p);
}
}
}
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