obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 225 insertions, 0 deletions

diff --git a/libjava/classpath/java/rmi/server/UID.java b/libjava/classpath/java/rmi/server/UID.java
new file mode 100644
index 000000000..464d3d860
--- /dev/null
+++ b/libjava/classpath/java/rmi/server/UID.java
@@ -0,0 +1,225 @@
+/* UID.java -- The unique object Id
+   Copyright (c) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.rmi.server;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+import java.io.Serializable;
+import java.net.InetAddress;
+
+/**
+ * Represents the unique identifier over time for the host which has generated
+ * it. It contains time (when created), counter (the number of the UID
+ * creation order) and virtual machine id components. The UID can also be
+ * constructed specifying a "well known" identifier in the for of short:
+ * this identifier defines the UID uniqueness alone.
+ *
+ * @author Audrius Meskauskas (audriusa@bioinformatics.org)
+ */
+public final class UID
+    implements Serializable
+{
+  /**
+   * Use the serial version uid for interoperability.
+   */
+  private static final long serialVersionUID = 1086053664494604050L;
+
+  /**
+   * The UID counter (the ordinary number in the sequence of number of UID's,
+   * created during the recent millisecond). In the next millisecond, it
+   * starts from the minimal value again. In the unlikely case of creating
+   * more than 65536 uids per millisecond the process pauses till the next
+   * ms.
+   */
+  private static short uidCounter = Short.MIN_VALUE;
+
+  /**
+   * The time, when the last UID has been created.
+   */
+  private static long last;
+
+  /**
+   * This constant tries to be the unique identifier of the virtual machine.
+   */
+  private static final int machineId = getMachineId();
+
+  /**
+   * The UID number in the UID creation sequence.
+   */
+  private short count;
+
+  /**
+   * Always gets the uniqueNr value.
+   */
+  private int unique;
+
+  /**
+   * The time stamp, when the UID was created.
+   */
+  private long time;
+
+  /**
+   * Create the new UID that would have the described features of the
+   * uniqueness.
+   */
+  public UID()
+  {
+    synchronized (UID.class)
+      {
+        time = System.currentTimeMillis();
+        unique = machineId;
+        if (time > last)
+          {
+            last = time;
+            count = uidCounter = Short.MIN_VALUE;
+          }
+        else
+          {
+            if (uidCounter == Short.MAX_VALUE)
+              {
+                // Make a 2 ms pause if the counter has reached the maximal
+                // value. This should seldom happen.
+                try
+                  {
+                    Thread.sleep(2);
+                  }
+                catch (InterruptedException e)
+                  {
+                  }
+                uidCounter = Short.MIN_VALUE;
+                time = last = System.currentTimeMillis();
+              }
+            count = ++uidCounter;
+          }
+      }
+  }
+
+  /**
+   * Create the new UID with the well known id (number). All UIDs, creates
+   * with the this constructor having the same parameter are equal to each
+   * other (regardless to the host and time where they were created.
+   *
+   * @param wellKnownId the well known UID.
+   */
+  public UID(short wellKnownId)
+  {
+    unique = wellKnownId;
+  }
+
+  /**
+   * Get the hashCode of this UID.
+   */
+  public int hashCode()
+  {
+    return (int) (unique ^ time ^ count);
+  }
+
+  /**
+   * Compare this UID with another UID for equality (not equal to other types of
+   * objects).
+   */
+  public boolean equals(Object other)
+  {
+    if (other instanceof UID)
+      {
+        UID ui = (UID) other;
+        return unique == ui.unique && time == ui.time && count == ui.count;
+      }
+    else
+      return false;
+  }
+
+  public static UID read(DataInput in) throws IOException
+  {
+    UID uid = new UID();
+    uid.unique = in.readInt();
+    uid.time = in.readLong();
+    uid.count = in.readShort();
+    return (uid);
+  }
+
+  public void write(DataOutput out) throws IOException
+  {
+    out.writeInt(unique);
+    out.writeLong(time);
+    out.writeShort(count);
+  }
+
+  /**
+   * Do our best to get the Id of this virtual machine.
+   */
+  static int getMachineId()
+  {
+    int hostIpHash;
+
+    try
+      {
+        // Try to get the host IP.
+        String host = InetAddress.getLocalHost().toString();
+        // This hash is content - based, not the address based.
+        hostIpHash = host.hashCode();
+      }
+    catch (Exception e)
+      {
+        // Failed due some reason.
+        hostIpHash = 0;
+      }
+
+    // Should be the unque address if hashcodes are addresses.
+    // Additionally, add the time when the RMI system was probably started
+    // (this class was first instantiated).
+    return new Object().hashCode() ^ (int) System.currentTimeMillis()
+           ^ hostIpHash;
+  }
+
+    /**
+   * Get the string representation of this UID.
+   *
+   * @return a string, uniquely identifying this id.
+   */
+  public String toString()
+  {
+    int max = Character.MAX_RADIX;
+    // Translate into object count, counting from 0.
+    long lc = (count - Short.MIN_VALUE) & 0xFFFF;
+    return Long.toString(unique, max) + ":" + Long.toString(time, max) + "."
+           + Long.toString(lc, max);
+  }
+}