--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/net/Socket/AccurateTimeout.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2002 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+ * @bug 4512028
+ * @summary Check the tolerance on read timeouts.
+ */
+import java.net.*;
+import java.io.*;
+
+public class AccurateTimeout {
+
+    static final int TOLERANCE = 100;
+
+    static boolean skipTest() {
+        String os = System.getProperty("os.name");
+        if (os.equals("Windows 95") ||
+            os.equals("Windows 98") ||
+            os.equals("Windows Me")) {
+
+            System.out.println("Due to an OS bug timeout tolerance cannot be tested on this OS");
+            return true;
+        }
+        return false;
+    }
+
+    public static void main(String args[]) throws Exception {
+
+        if (skipTest()) {
+            return;
+        }
+
+        int failures = 0;
+        int timeout;
+
+        System.out.println("");
+        System.out.println("Testing Socket.getInputStream().read() ...");
+        System.out.println("");
+
+        ServerSocket ss = new ServerSocket(0);
+        Socket s1 = new Socket(InetAddress.getLocalHost(), ss.getLocalPort());
+        Socket s2 = ss.accept();
+
+        InputStream in = s1.getInputStream();
+
+        timeout = 100;
+        while (timeout < 2500) {
+            s1.setSoTimeout(timeout);
+
+            long startTime = System.currentTimeMillis();
+            try {
+                in.read();
+            } catch (SocketTimeoutException e) {
+            }
+            long actual = System.currentTimeMillis() - startTime;
+
+            System.out.print("excepted: " + timeout + " actual: " + actual);
+
+            if (Math.abs(actual-timeout) > TOLERANCE) {
+                System.out.print(" *** FAIL: outside tolerance");
+                failures++;
+            } else {
+                System.out.print(" PASS.");
+            }
+
+            System.out.println("");
+            timeout += 200;
+        }
+
+        s1.close();
+        s2.close();
+        ss.close();
+
+
+        // ----------
+
+
+        System.out.println("");
+        System.out.println("Testing DatagramSocket.receive ...");
+        System.out.println("");
+
+        byte b[] = new byte[8];
+        DatagramPacket p = new DatagramPacket(b, b.length);
+
+        DatagramSocket ds = new DatagramSocket();
+
+        timeout = 100;
+        while (timeout < 2500) {
+            ds.setSoTimeout(timeout);
+
+            long startTime = System.currentTimeMillis();
+            try {
+                ds.receive(p);
+            } catch (SocketTimeoutException e) {
+            }
+            long actual = System.currentTimeMillis() - startTime;
+
+            System.out.print("excepted: " + timeout + " actual: " + actual);
+
+            if (Math.abs(actual-timeout) > TOLERANCE) {
+                System.out.print(" *** FAIL: outside tolerance");
+                failures++;
+            } else {
+                System.out.print(" PASS.");
+            }
+
+            System.out.println("");
+            timeout += 200;
+        }
+
+        ds.close();
+
+        System.out.println("");
+
+        // ---------
+
+        if (failures > 0) {
+            throw new Exception("Test failed: " + failures +
+                " test(s) outside tolerance");
+        }
+
+    }
+
+}