--- jsr166/src/test/tck/JSR166TestCase.java	2015/09/26 19:08:26	1.147
+++ jsr166/src/test/tck/JSR166TestCase.java	2015/10/03 16:57:25	1.149
@@ -743,9 +743,19 @@ public class JSR166TestCase extends Test
     }
 
     /**
+     * Allows use of try-with-resources with per-test thread pools.
+     */
+    static class PoolCloser<T extends ExecutorService>
+            implements AutoCloseable {
+        public final T pool;
+        public PoolCloser(T pool) { this.pool = pool; }
+        public void close() { joinPool(pool); }
+    }
+
+    /**
      * Waits out termination of a thread pool or fails doing so.
      */
-    void joinPool(ExecutorService pool) {
+    static void joinPool(ExecutorService pool) {
         try {
             pool.shutdown();
             if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
@@ -1254,6 +1264,13 @@ public class JSR166TestCase extends Test
             }};
     }
 
+    public Runnable countDowner(final CountDownLatch latch) {
+        return new CheckedRunnable() {
+            public void realRun() throws InterruptedException {
+                latch.countDown();
+            }};
+    }
+
     public Runnable awaiter(final CountDownLatch latch) {
         return new CheckedRunnable() {
             public void realRun() throws InterruptedException {