--- jsr166/src/test/loops/SimpleMutexLoops.java	2005/06/10 15:45:19	1.2
+++ jsr166/src/test/loops/SimpleMutexLoops.java	2016/12/31 19:12:36	1.9
@@ -1,16 +1,12 @@
 /*
- * @test
- * @synopsis multiple threads using a single lock
- */
-/*
  * Written by Doug Lea with assistance from members of JCP JSR-166
- * Expert Group and released to the public domain. Use, modify, and
- * redistribute this code in any way without acknowledgement.
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
  */
 
-import java.util.concurrent.*;
-import java.util.concurrent.locks.*;
-import java.util.*;
+import java.util.concurrent.CyclicBarrier;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 public final class SimpleMutexLoops {
     static final ExecutorService pool = Executors.newCachedThreadPool();
@@ -20,23 +16,22 @@ public final class SimpleMutexLoops {
 
     public static void main(String[] args) throws Exception {
         int maxThreads = 100;
-        if (args.length > 0) 
+        if (args.length > 0)
             maxThreads = Integer.parseInt(args[0]);
 
         new MutexLoop(1).test();
         new MutexLoop(1).test();
         print = true;
 
-        int k = 1;
-        for (int i = 1; i <= maxThreads;) {
+        for (int k = 1, i = 1; i <= maxThreads;) {
             System.out.print("Threads: " + i);
             new MutexLoop(i).test();
             Thread.sleep(100);
             if (i == k) {
                 k = i << 1;
                 i = i + (i >>> 1);
-            } 
-            else 
+            }
+            else
                 i = k;
         }
         pool.shutdown();
@@ -56,15 +51,15 @@ public final class SimpleMutexLoops {
         }
 
         final void test() throws Exception {
-            for (int i = 0; i < nthreads; ++i) 
+            for (int i = 0; i < nthreads; ++i)
                 pool.execute(this);
             barrier.await();
             barrier.await();
             if (print) {
                 long time = timer.getTime();
-                long tpi = time / ((long)iters * nthreads);
+                long tpi = time / ((long) iters * nthreads);
                 System.out.print("\t" + LoopHelpers.rightJustify(tpi) + " ns per lock");
-                double secs = (double)(time) / 1000000000.0;
+                double secs = (double) time / 1000000000.0;
                 System.out.println("\t " + secs + "s run time");
             }
 
@@ -76,7 +71,7 @@ public final class SimpleMutexLoops {
         public final void run() {
             final Mutex lock = this.lock;
             try {
-                barrier.await(); 
+                barrier.await();
                 int sum = v + 1;
                 int x = 0;
                 int n = iters;
@@ -95,12 +90,12 @@ public final class SimpleMutexLoops {
                         ++readBarrier;
                     for (int l = x & 7; l > 0; --l)
                         sum += LoopHelpers.compute6(sum);
-                } 
+                }
                 barrier.await();
                 result += sum;
             }
-            catch (Exception ie) { 
-                return; 
+            catch (Exception ie) {
+                return;
             }
         }
     }