| /* |
| * Copyright (c) 2017, 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 FileChannel write with DirectIO |
| * @library .. /test/lib |
| * @build DirectIOTest |
| * @run main/othervm WriteDirect |
| */ |
| |
| import java.io.*; |
| import java.nio.*; |
| import java.nio.channels.*; |
| import java.nio.file.Files; |
| import java.nio.file.FileStore; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.nio.file.StandardOpenOption; |
| import com.sun.nio.file.ExtendedOpenOption; |
| |
| public class WriteDirect { |
| |
| private static int charsPerGroup = -1; |
| |
| private static int alignment = -1; |
| |
| private static boolean initTests() throws Exception { |
| Path p = DirectIOTest.createTempFile(); |
| if (!DirectIOTest.isDirectIOSupportedByFS(p)) { |
| Files.delete(p); |
| return false; |
| } |
| try { |
| FileStore fs = Files.getFileStore(p); |
| alignment = (int)fs.getBlockSize(); |
| charsPerGroup = alignment; |
| } finally { |
| Files.delete(p); |
| } |
| return true; |
| } |
| |
| public static void main(String[] args) throws Exception { |
| if (initTests()) { |
| testWithNotAlignedBuffer(); |
| testWithNotAlignedBufferOffset(); |
| testWithArrayOfBuffer(); |
| } |
| } |
| |
| static void testWithNotAlignedBuffer() throws Exception { |
| Path p = DirectIOTest.createTempFile(); |
| try (FileChannel fc = FileChannel.open(p, |
| StandardOpenOption.WRITE, StandardOpenOption.DELETE_ON_CLOSE, |
| ExtendedOpenOption.DIRECT)) { |
| int bufferSize = charsPerGroup - 1; |
| ByteBuffer src = ByteBuffer.allocate(bufferSize); |
| try { |
| fc.write(src); |
| throw new RuntimeException("Expected exception not thrown"); |
| } catch (IOException e) { |
| if (!e.getMessage().contains("Number of remaining bytes (" |
| + bufferSize + ") is not a multiple of the block size (" |
| + alignment + ")")) |
| throw new Exception("Write failure"); |
| } |
| } |
| } |
| |
| private static void testWithNotAlignedBufferOffset() throws Exception { |
| int bufferSize = charsPerGroup * 2; |
| int pos = alignment - 1; |
| |
| Path p = DirectIOTest.createTempFile(); |
| |
| try (FileChannel fc = FileChannel.open(p, |
| StandardOpenOption.WRITE, StandardOpenOption.DELETE_ON_CLOSE, |
| ExtendedOpenOption.DIRECT)) { |
| ByteBuffer block = ByteBuffer.allocateDirect(bufferSize); |
| block.position(pos); |
| block.limit(bufferSize - 1); |
| try { |
| fc.write(block); |
| throw new RuntimeException("Expected exception not thrown"); |
| } catch (IOException e) { |
| if (!e.getMessage().contains("Current location of the bytebuffer " |
| + "(" + pos + ") is not a multiple of the block size (" |
| + alignment + ")")) |
| throw new Exception("Write test failed"); |
| } |
| } |
| } |
| |
| static void testWithArrayOfBuffer() throws Exception { |
| Path p = DirectIOTest.createTempFile(); |
| ByteBuffer[] srcs = new ByteBuffer[4]; |
| try (FileChannel fc = FileChannel.open(p, |
| StandardOpenOption.WRITE, ExtendedOpenOption.DIRECT)) { |
| for (int i = 0; i < 4; i++) { |
| srcs[i] = ByteBuffer.allocateDirect(charsPerGroup + alignment - 1) |
| .alignedSlice(alignment); |
| for (int j = 0; j < charsPerGroup; j++) { |
| srcs[i].put((byte)i); |
| } |
| srcs[i].flip(); |
| } |
| |
| fc.write(srcs, 1, 2); |
| } |
| |
| try (FileChannel fc = FileChannel.open(p, |
| StandardOpenOption.READ, StandardOpenOption.DELETE_ON_CLOSE)) { |
| ByteBuffer bb = ByteBuffer.allocateDirect(charsPerGroup * 2); |
| fc.read(bb); |
| bb.flip(); |
| for (int k = 0; k < charsPerGroup; k++) { |
| if (bb.get() != 1) |
| throw new RuntimeException("Write failure"); |
| } |
| for (int m = 0; m < charsPerGroup; m++) { |
| if (bb.get() != 2) |
| throw new RuntimeException("Write failure"); |
| } |
| try { |
| bb.get(); |
| throw new RuntimeException("Write failure"); |
| } catch (BufferUnderflowException bufe) { |
| // correct result |
| } |
| } |
| } |
| } |