* gnu/java/nio/DatagramChannelImpl.java

	(inChannelOperation): New field.
	(isInChannelOperation): New accessor.
	(setInChannelOperation): New modifier.
	(receive): Use capacity() - position() of destination
	buffer instead of remaining(). Set and reset our "in
	channel operation indicator" before and after delegating
	the receive to our datagram socket. Removed testing code.
	Update destination buffer's current position if it is
	backed by a byte array (hasArray() is true).
	(send): Set and reset our "in channel operation indicator"
	before and after delegating the send to our datagram socket.
	Removed testing code. Update source buffer's current position
	if it is backed by a byte array (hasArray() is true).
	* gnu/java/nio/SocketChannelImpl.java (read(ByteBuffer)):
	Use capacity() - position() of destination buffer instead
	of remaining().
	* java/net/DatagramSocket.java (receive): Don't throw an
	IllegalBlockingModeException if we have a non-blocking
	channel which initiated this operation.
	(send): Likewise.

From-SVN: r77173

4 files changed, 78 insertions, 12 deletions

diff --git a/libjava/ChangeLog b/libjava/ChangeLog
index 454b748..3392b3b 100644
--- a/libjava/ChangeLog
+++ b/libjava/ChangeLog
@@ -1,3 +1,27 @@
+2004-02-03  Mohan Embar  <gnustuff@thisiscool.com>
+
+	* gnu/java/nio/DatagramChannelImpl.java
+	(inChannelOperation): New field.
+	(isInChannelOperation): New accessor.
+	(setInChannelOperation): New modifier.
+	(receive): Use capacity() - position() of destination
+	buffer instead of remaining(). Set and reset our "in
+	channel operation indicator" before and after delegating
+	the receive to our datagram socket. Removed testing code.
+	Update destination buffer's current position if it is
+	backed by a byte array (hasArray() is true).
+	(send): Set and reset our "in channel operation indicator"
+	before and after delegating the send to our datagram socket.
+	Removed testing code. Update source buffer's current position
+	if it is backed by a byte array (hasArray() is true).
+	* gnu/java/nio/SocketChannelImpl.java (read(ByteBuffer)):
+	Use capacity() - position() of destination buffer instead
+	of remaining().
+	* java/net/DatagramSocket.java (receive): Don't throw an
+	IllegalBlockingModeException if we have a non-blocking
+	channel which initiated this operation.
+	(send): Likewise.
+
 2004-02-01  Thomas Fitzsimmons  <fitzsim@redhat.com>
 
 	* configure.in: Add pkgconfig check for glib and gthread.
diff --git a/libjava/gnu/java/nio/DatagramChannelImpl.java b/libjava/gnu/java/nio/DatagramChannelImpl.java
index 3531803..baeac19d 100644
--- a/libjava/gnu/java/nio/DatagramChannelImpl.java
+++ b/libjava/gnu/java/nio/DatagramChannelImpl.java
@@ -57,6 +57,33 @@ public final class DatagramChannelImpl extends DatagramChannel
 {
   private NIODatagramSocket socket;
   
+  /**
+   * Indicates whether this channel initiated whatever operation
+   * is being invoked on our datagram socket.
+   */
+  private boolean inChannelOperation;
+
+  /**
+   * Indicates whether our datagram socket should ignore whether
+   * we are set to non-blocking mode. Certain operations on our
+   * socket throw an <code>IllegalBlockingModeException</code> if
+   * we are in non-blocking mode, <i>except</i> if the operation
+   * is initiated by us.
+   */
+  public final boolean isInChannelOperation()
+  {
+    return inChannelOperation;
+  }
+  
+  /**
+   * Sets our indicator of whether we are initiating an I/O operation
+   * on our socket.
+   */
+  public final void setInChannelOperation(boolean b)
+  {
+    inChannelOperation = b;
+  }
+ 
   protected DatagramChannelImpl (SelectorProvider provider)
     throws IOException
   {
@@ -178,7 +205,7 @@ public final class DatagramChannelImpl extends DatagramChannel
     try
       {
         DatagramPacket packet;
-        int len = dst.remaining();
+        int len = dst.capacity() - dst.position();
         
         if (dst.hasArray())
           {
@@ -196,23 +223,23 @@ public final class DatagramChannelImpl extends DatagramChannel
         try
           {
             begin();
+            setInChannelOperation(true);
             socket.receive (packet);
             completed = true;
           }
         finally
           {
             end (completed);
+            setInChannelOperation(false);
           }
 
         if (!dst.hasArray())
           {
             dst.put (packet.getData(), packet.getOffset(), packet.getLength());
           }
-
-        // FIMXE: remove this testing code.
-        for (int i = 0; i < packet.getLength(); i++)
+        else
           {
-            System.out.println ("Byte " + i + " has value " + packet.getData() [packet.getOffset() + i]);
+            dst.position (dst.position() + packet.getLength());
           }
 
         return packet.getSocketAddress();
@@ -246,13 +273,25 @@ public final class DatagramChannelImpl extends DatagramChannel
 
     DatagramPacket packet = new DatagramPacket (buffer, offset, len, target);
 
-    // FIMXE: remove this testing code.
-    for (int i = 0; i < packet.getLength(); i++)
+    boolean completed = false;
+    try
+      {
+        begin();
+        setInChannelOperation(true);
+        socket.send(packet);
+        completed = true;
+      }
+    finally
+      {
+        end (completed);
+        setInChannelOperation(false);
+      }
+      
+    if (src.hasArray())
       {
-        System.out.println ("Byte " + i + " has value " + packet.getData() [packet.getOffset() + i]);
+	src.position (src.position() + len);
       }
 
-    socket.send (packet);
     return len;
   }
 }
diff --git a/libjava/gnu/java/nio/SocketChannelImpl.java b/libjava/gnu/java/nio/SocketChannelImpl.java
index 4df40b4..d490529 100644
--- a/libjava/gnu/java/nio/SocketChannelImpl.java
+++ b/libjava/gnu/java/nio/SocketChannelImpl.java
@@ -226,7 +226,7 @@ public final class SocketChannelImpl extends SocketChannel
     int offset = 0;
     InputStream input = socket.getInputStream();
     int available = input.available();
-    int len = dst.remaining();
+    int len = dst.capacity() - dst.position();
 	
     if (available == 0)
       return 0;
diff --git a/libjava/java/net/DatagramSocket.java b/libjava/java/net/DatagramSocket.java
index c9c0f5d..c5920a0 100644
--- a/libjava/java/net/DatagramSocket.java
+++ b/libjava/java/net/DatagramSocket.java
@@ -39,6 +39,7 @@ exception statement from your version. */
 package java.net;
 
 import gnu.java.net.PlainDatagramSocketImpl;
+import gnu.java.nio.DatagramChannelImpl;
 import java.io.IOException;
 import java.nio.channels.DatagramChannel;
 import java.nio.channels.IllegalBlockingModeException;
@@ -565,7 +566,8 @@ public class DatagramSocket
         ("Socket connected to a multicast address my not receive");
 
     if (getChannel() != null
-        && !getChannel().isBlocking ())
+        && !getChannel().isBlocking ()
+        && !((DatagramChannelImpl) getChannel()).isInChannelOperation())
       throw new IllegalBlockingModeException ();
 
     getImpl().receive(p);
@@ -618,7 +620,8 @@ public class DatagramSocket
     // use getTimeToLive for TTL val.
 
     if (getChannel() != null
-        && !getChannel().isBlocking ())
+        && !getChannel().isBlocking ()
+        && !((DatagramChannelImpl) getChannel()).isInChannelOperation())
       throw new IllegalBlockingModeException ();
 
     getImpl().send(p);