--- jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java	2011/06/03 05:07:14	1.42
+++ jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java	2014/12/31 19:05:42	1.47
@@ -6,12 +6,19 @@
  * Pat Fisher, Mike Judd.
  */
 
-import junit.framework.*;
-import java.util.*;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import static java.util.concurrent.TimeUnit.NANOSECONDS;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
 import java.util.concurrent.locks.AbstractQueuedSynchronizer;
 import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject;
 
+import junit.framework.AssertionFailedError;
+import junit.framework.Test;
+import junit.framework.TestSuite;
+
 public class AbstractQueuedSynchronizerTest extends JSR166TestCase {
     public static void main(String[] args) {
         junit.textui.TestRunner.run(suite());
@@ -121,7 +128,7 @@ public class AbstractQueuedSynchronizerT
     }
 
     /** A constant to clarify calls to checking methods below. */
-    final static Thread[] NO_THREADS = new Thread[0];
+    static final Thread[] NO_THREADS = new Thread[0];
 
     /**
      * Spin-waits until sync.isQueued(t) becomes true.
@@ -198,7 +205,7 @@ public class AbstractQueuedSynchronizerT
                      new HashSet<Thread>(Arrays.asList(threads)));
     }
 
-    enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
+    enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
 
     /**
      * Awaits condition using the specified AwaitMethod.
@@ -1190,20 +1197,51 @@ public class AbstractQueuedSynchronizerT
      */
     public void testTryAcquireSharedNanos_Timeout() {
         final BooleanLatch l = new BooleanLatch();
+        final BooleanLatch observedQueued = new BooleanLatch();
+        final long timeoutMillis = timeoutMillis();
         Thread t = newStartedThread(new CheckedRunnable() {
             public void realRun() throws InterruptedException {
                 assertFalse(l.isSignalled());
-                long startTime = System.nanoTime();
-                long nanos = MILLISECONDS.toNanos(timeoutMillis());
-                assertFalse(l.tryAcquireSharedNanos(0, nanos));
-                assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
+                for (long millis = timeoutMillis();
+                     !observedQueued.isSignalled();
+                     millis *= 2) {
+                    long nanos = MILLISECONDS.toNanos(millis);
+                    long startTime = System.nanoTime();
+                    assertFalse(l.tryAcquireSharedNanos(0, nanos));
+                    assertTrue(millisElapsedSince(startTime) >= millis);
+                }
                 assertFalse(l.isSignalled());
             }});
 
         waitForQueuedThread(l, t);
+        observedQueued.releaseShared(0);
         assertFalse(l.isSignalled());
         awaitTermination(t);
         assertFalse(l.isSignalled());
     }
 
+    /**
+     * awaitNanos/timed await with 0 wait times out immediately
+     */
+    public void testAwait_Zero() throws InterruptedException {
+        final Mutex sync = new Mutex();
+        final ConditionObject c = sync.newCondition();
+        sync.acquire();
+        assertTrue(c.awaitNanos(0L) <= 0);
+        assertFalse(c.await(0L, NANOSECONDS));
+        sync.release();
+    }
+
+    /**
+     * awaitNanos/timed await with maximum negative wait times does not underflow
+     */
+    public void testAwait_NegativeInfinity() throws InterruptedException {
+        final Mutex sync = new Mutex();
+        final ConditionObject c = sync.newCondition();
+        sync.acquire();
+        assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0);
+        assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS));
+        sync.release();
+    }
+
 }