--- jsr166/src/test/tck/JSR166TestCase.java	2017/05/13 21:43:50	1.224
+++ jsr166/src/test/tck/JSR166TestCase.java	2017/05/14 03:12:05	1.227
@@ -1068,7 +1068,7 @@ public class JSR166TestCase extends Test
     void assertThreadBlocks(Thread thread, Thread.State expected) {
         // always sleep at least 1 ms, avoiding transitional states
         // with high probability
-        for (long retries = LONG_DELAY_MS; retries-->0; ) {
+        for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
             try { delay(1); }
             catch (InterruptedException fail) {
                 fail("Unexpected InterruptedException");
@@ -1104,28 +1104,6 @@ public class JSR166TestCase extends Test
     }
 
     /**
-     * Checks that the threads do not terminate within the default
-     * millisecond delay of {@code timeoutMillis()}.
-     */
-    void assertThreadsStayAlive(Thread... threads) {
-        assertThreadsStayAlive(timeoutMillis(), threads);
-    }
-
-    /**
-     * Checks that the threads do not terminate within the given millisecond delay.
-     */
-    void assertThreadsStayAlive(long millis, Thread... threads) {
-        try {
-            // No need to optimize the failing case via Thread.join.
-            delay(millis);
-            for (Thread thread : threads)
-                assertTrue(thread.isAlive());
-        } catch (InterruptedException fail) {
-            threadFail("Unexpected InterruptedException");
-        }
-    }
-
-    /**
      * Checks that future.get times out, with the default timeout of
      * {@code timeoutMillis()}.
      */
@@ -1635,6 +1613,14 @@ public class JSR166TestCase extends Test
         } catch (Throwable fail) {
             threadUnexpectedException(fail);
         }
+    }
+
+    public void await(CyclicBarrier barrier) {
+        try {
+            barrier.await(LONG_DELAY_MS, MILLISECONDS);
+        } catch (Throwable fail) {
+            threadUnexpectedException(fail);
+        }
     }
 
 //     /**