8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/windows/classes/sun/nio/ch/FileDispatcherImpl.java

@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2000, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package sun.nio.ch;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import jdk.internal.misc.SharedSecrets;
+import jdk.internal.misc.JavaIOFileDescriptorAccess;
+import sun.security.action.GetPropertyAction;
+
+class FileDispatcherImpl extends FileDispatcher {
+
+    private static final JavaIOFileDescriptorAccess fdAccess =
+        SharedSecrets.getJavaIOFileDescriptorAccess();
+
+    // set to true if fast file transmission (TransmitFile) is enabled
+    private static final boolean fastFileTransfer;
+
+    FileDispatcherImpl() { }
+
+    @Override
+    boolean needsPositionLock() {
+        return true;
+    }
+
+    int read(FileDescriptor fd, long address, int len)
+        throws IOException
+    {
+        return read0(fd, address, len);
+    }
+
+    int pread(FileDescriptor fd, long address, int len, long position)
+        throws IOException
+    {
+        return pread0(fd, address, len, position);
+    }
+
+    long readv(FileDescriptor fd, long address, int len) throws IOException {
+        return readv0(fd, address, len);
+    }
+
+    int write(FileDescriptor fd, long address, int len) throws IOException {
+        return write0(fd, address, len, fdAccess.getAppend(fd));
+    }
+
+    int pwrite(FileDescriptor fd, long address, int len, long position)
+        throws IOException
+    {
+        return pwrite0(fd, address, len, position);
+    }
+
+    long writev(FileDescriptor fd, long address, int len) throws IOException {
+        return writev0(fd, address, len, fdAccess.getAppend(fd));
+    }
+
+    int force(FileDescriptor fd, boolean metaData) throws IOException {
+        return force0(fd, metaData);
+    }
+
+    int truncate(FileDescriptor fd, long size) throws IOException {
+        return truncate0(fd, size);
+    }
+
+    int allocate(FileDescriptor fd, long size) throws IOException {
+        // truncate0() works for extending and truncating file size
+        return truncate0(fd, size);
+    }
+
+    long size(FileDescriptor fd) throws IOException {
+        return size0(fd);
+    }
+
+    int lock(FileDescriptor fd, boolean blocking, long pos, long size,
+             boolean shared) throws IOException
+    {
+        return lock0(fd, blocking, pos, size, shared);
+    }
+
+    void release(FileDescriptor fd, long pos, long size) throws IOException {
+        release0(fd, pos, size);
+    }
+
+    void close(FileDescriptor fd) throws IOException {
+        close0(fd);
+    }
+
+    FileDescriptor duplicateForMapping(FileDescriptor fd) throws IOException {
+        // on Windows we need to keep a handle to the file
+        FileDescriptor result = new FileDescriptor();
+        long handle = duplicateHandle(fdAccess.getHandle(fd));
+        fdAccess.setHandle(result, handle);
+        return result;
+    }
+
+    boolean canTransferToDirectly(java.nio.channels.SelectableChannel sc) {
+        return fastFileTransfer && sc.isBlocking();
+    }
+
+    boolean transferToDirectlyNeedsPositionLock() {
+        return true;
+    }
+
+    static boolean isFastFileTransferRequested() {
+        String fileTransferProp = GetPropertyAction
+                .privilegedGetProperty("jdk.nio.enableFastFileTransfer");
+        boolean enable;
+        if ("".equals(fileTransferProp)) {
+            enable = true;
+        } else {
+            enable = Boolean.parseBoolean(fileTransferProp);
+        }
+        return enable;
+    }
+
+    static {
+        IOUtil.load();
+        fastFileTransfer = isFastFileTransferRequested();
+    }
+
+    //-- Native methods
+
+    static native int read0(FileDescriptor fd, long address, int len)
+        throws IOException;
+
+    static native int pread0(FileDescriptor fd, long address, int len,
+                             long position) throws IOException;
+
+    static native long readv0(FileDescriptor fd, long address, int len)
+        throws IOException;
+
+    static native int write0(FileDescriptor fd, long address, int len, boolean append)
+        throws IOException;
+
+    static native int pwrite0(FileDescriptor fd, long address, int len,
+                             long position) throws IOException;
+
+    static native long writev0(FileDescriptor fd, long address, int len, boolean append)
+        throws IOException;
+
+    static native int force0(FileDescriptor fd, boolean metaData)
+        throws IOException;
+
+    static native int truncate0(FileDescriptor fd, long size)
+        throws IOException;
+
+    static native long size0(FileDescriptor fd) throws IOException;
+
+    static native int lock0(FileDescriptor fd, boolean blocking, long pos,
+                            long size, boolean shared) throws IOException;
+
+    static native void release0(FileDescriptor fd, long pos, long size)
+        throws IOException;
+
+    static native void close0(FileDescriptor fd) throws IOException;
+
+    static native long duplicateHandle(long fd) throws IOException;
+}