8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/unix/classes/sun/nio/ch/SourceChannelImpl.java

@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) 2000, 2013, 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.*;
+import java.nio.ByteBuffer;
+import java.nio.channels.*;
+import java.nio.channels.spi.*;
+
+
+class SourceChannelImpl
+    extends Pipe.SourceChannel
+    implements SelChImpl
+{
+
+    // Used to make native read and write calls
+    private static final NativeDispatcher nd = new FileDispatcherImpl();
+
+    // The file descriptor associated with this channel
+    FileDescriptor fd;
+
+    // fd value needed for dev/poll. This value will remain valid
+    // even after the value in the file descriptor object has been set to -1
+    int fdVal;
+
+    // ID of native thread doing read, for signalling
+    private volatile long thread;
+
+    // Lock held by current reading thread
+    private final Object lock = new Object();
+
+    // Lock held by any thread that modifies the state fields declared below
+    // DO NOT invoke a blocking I/O operation while holding this lock!
+    private final Object stateLock = new Object();
+
+    // -- The following fields are protected by stateLock
+
+    // Channel state
+    private static final int ST_UNINITIALIZED = -1;
+    private static final int ST_INUSE = 0;
+    private static final int ST_KILLED = 1;
+    private volatile int state = ST_UNINITIALIZED;
+
+    // -- End of fields protected by stateLock
+
+
+    public FileDescriptor getFD() {
+        return fd;
+    }
+
+    public int getFDVal() {
+        return fdVal;
+    }
+
+    SourceChannelImpl(SelectorProvider sp, FileDescriptor fd) {
+        super(sp);
+        this.fd = fd;
+        this.fdVal = IOUtil.fdVal(fd);
+        this.state = ST_INUSE;
+    }
+
+    protected void implCloseSelectableChannel() throws IOException {
+        synchronized (stateLock) {
+            if (state != ST_KILLED)
+                nd.preClose(fd);
+            long th = thread;
+            if (th != 0)
+                NativeThread.signal(th);
+            if (!isRegistered())
+                kill();
+        }
+    }
+
+    public void kill() throws IOException {
+        synchronized (stateLock) {
+            if (state == ST_KILLED)
+                return;
+            if (state == ST_UNINITIALIZED) {
+                state = ST_KILLED;
+                return;
+            }
+            assert !isOpen() && !isRegistered();
+            nd.close(fd);
+            state = ST_KILLED;
+        }
+    }
+
+    protected void implConfigureBlocking(boolean block) throws IOException {
+        IOUtil.configureBlocking(fd, block);
+    }
+
+    public boolean translateReadyOps(int ops, int initialOps,
+                                     SelectionKeyImpl sk) {
+        int intOps = sk.nioInterestOps(); // Do this just once, it synchronizes
+        int oldOps = sk.nioReadyOps();
+        int newOps = initialOps;
+
+        if ((ops & Net.POLLNVAL) != 0)
+            throw new Error("POLLNVAL detected");
+
+        if ((ops & (Net.POLLERR | Net.POLLHUP)) != 0) {
+            newOps = intOps;
+            sk.nioReadyOps(newOps);
+            return (newOps & ~oldOps) != 0;
+        }
+
+        if (((ops & Net.POLLIN) != 0) &&
+            ((intOps & SelectionKey.OP_READ) != 0))
+            newOps |= SelectionKey.OP_READ;
+
+        sk.nioReadyOps(newOps);
+        return (newOps & ~oldOps) != 0;
+    }
+
+    public boolean translateAndUpdateReadyOps(int ops, SelectionKeyImpl sk) {
+        return translateReadyOps(ops, sk.nioReadyOps(), sk);
+    }
+
+    public boolean translateAndSetReadyOps(int ops, SelectionKeyImpl sk) {
+        return translateReadyOps(ops, 0, sk);
+    }
+
+    public void translateAndSetInterestOps(int ops, SelectionKeyImpl sk) {
+        if (ops == SelectionKey.OP_READ)
+            ops = Net.POLLIN;
+        sk.selector.putEventOps(sk, ops);
+    }
+
+    private void ensureOpen() throws IOException {
+        if (!isOpen())
+            throw new ClosedChannelException();
+    }
+
+    public int read(ByteBuffer dst) throws IOException {
+        ensureOpen();
+        synchronized (lock) {
+            int n = 0;
+            try {
+                begin();
+                if (!isOpen())
+                    return 0;
+                thread = NativeThread.current();
+                do {
+                    n = IOUtil.read(fd, dst, -1, nd);
+                } while ((n == IOStatus.INTERRUPTED) && isOpen());
+                return IOStatus.normalize(n);
+            } finally {
+                thread = 0;
+                end((n > 0) || (n == IOStatus.UNAVAILABLE));
+                assert IOStatus.check(n);
+            }
+        }
+    }
+
+    public long read(ByteBuffer[] dsts, int offset, int length)
+        throws IOException
+    {
+        if ((offset < 0) || (length < 0) || (offset > dsts.length - length))
+           throw new IndexOutOfBoundsException();
+        return read(Util.subsequence(dsts, offset, length));
+    }
+
+    public long read(ByteBuffer[] dsts) throws IOException {
+        if (dsts == null)
+            throw new NullPointerException();
+        ensureOpen();
+        synchronized (lock) {
+            long n = 0;
+            try {
+                begin();
+                if (!isOpen())
+                    return 0;
+                thread = NativeThread.current();
+                do {
+                    n = IOUtil.read(fd, dsts, nd);
+                } while ((n == IOStatus.INTERRUPTED) && isOpen());
+                return IOStatus.normalize(n);
+            } finally {
+                thread = 0;
+                end((n > 0) || (n == IOStatus.UNAVAILABLE));
+                assert IOStatus.check(n);
+            }
+        }
+    }
+}