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root/jsr166/jsr166/src/test/loops/SimpleWriteLockLoops.java
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Comparing jsr166/src/test/loops/SimpleWriteLockLoops.java (file contents):
Revision 1.2 by dl, Fri Jun 10 15:45:19 2005 UTC vs.
Revision 1.7 by jsr166, Wed Dec 31 17:00:58 2014 UTC

# Line 1 | Line 1
1   /*
2 – * @test
3 – * @synopsis multiple threads using a single lock
4 – */
5 – /*
2   * Written by Doug Lea with assistance from members of JCP JSR-166
3 < * Expert Group and released to the public domain. Use, modify, and
4 < * redistribute this code in any way without acknowledgement.
3 > * Expert Group and released to the public domain, as explained at
4 > * http://creativecommons.org/publicdomain/zero/1.0/
5   */
6  
7 + import java.util.*;
8   import java.util.concurrent.*;
9   import java.util.concurrent.locks.*;
13 – import java.util.*;
10  
11   public final class SimpleWriteLockLoops {
12      static final ExecutorService pool = Executors.newCachedThreadPool();
# Line 20 | Line 16 | public final class SimpleWriteLockLoops
16  
17      public static void main(String[] args) throws Exception {
18          int maxThreads = 100;
19 <        if (args.length > 0)
19 >        if (args.length > 0)
20              maxThreads = Integer.parseInt(args[0]);
21  
22          print = true;
# Line 52 | Line 48 | public final class SimpleWriteLockLoops
48          }
49  
50          final void test() throws Exception {
51 <            for (int i = 0; i < nthreads; ++i)
51 >            for (int i = 0; i < nthreads; ++i)
52                  pool.execute(this);
53              barrier.await();
54              barrier.await();
55              if (print) {
56                  long time = timer.getTime();
57 <                long tpi = time / ((long)iters * nthreads);
57 >                long tpi = time / ((long) iters * nthreads);
58                  System.out.print("\t" + LoopHelpers.rightJustify(tpi) + " ns per lock");
59 <                double secs = (double)(time) / 1000000000.0;
59 >                double secs = (double) time / 1000000000.0;
60                  System.out.println("\t " + secs + "s run time");
61              }
62  
# Line 72 | Line 68 | public final class SimpleWriteLockLoops
68          public final void run() {
69              final Lock lock = this.lock.writeLock();
70              try {
71 <                barrier.await();
71 >                barrier.await();
72                  int sum = v + 1;
73                  int x = 0;
74                  int n = iters;
# Line 91 | Line 87 | public final class SimpleWriteLockLoops
87                          ++readBarrier;
88                      for (int l = x & 7; l > 0; --l)
89                          sum += LoopHelpers.compute6(sum);
90 <                }
90 >                }
91                  barrier.await();
92                  result += sum;
93              }
94 <            catch (Exception ie) {
95 <                return;
94 >            catch (Exception ie) {
95 >                return;
96              }
97          }
98      }

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