mcs/class/System.Core/Test/System.Linq/ParallelTestHelper.cs

   1 #if NET_4_0
   2 // TestHelper.cs
   3 //
   4 // Copyright (c) 2008 Jérémie "Garuma" Laval
   5 //
   6 // Permission is hereby granted, free of charge, to any person obtaining a copy
   7 // of this software and associated documentation files (the "Software"), to deal
   8 // in the Software without restriction, including without limitation the rights
   9 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 // copies of the Software, and to permit persons to whom the Software is
  11 // furnished to do so, subject to the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 // THE SOFTWARE.
  23 //
  24 //
  25
  26 using System;
  27 using System.Threading;
  28 using System.Collections.Concurrent;
  29
  30 namespace MonoTests.System.Linq
  31 {
  32         public static class ParallelTestHelper
  33         {
  34                 const int NumRun = 100;
  35
  36                 public static void Repeat (Action action)
  37                 {
  38                         Repeat (action, NumRun);
  39                 }
  40
  41                 public static void Repeat (Action action, int numRun)
  42                 {
  43                         for (int i = 0; i < numRun; i++) {
  44                           //Console.WriteLine ("Run " + i.ToString ());
  45                                 action ();
  46                         }
  47                 }
  48
  49                 public static void ParallelStressTest<TSource>(TSource obj, Action<TSource> action)
  50                 {
  51                         ParallelStressTest(obj, action, Environment.ProcessorCount + 2);
  52                 }
  53
  54                 public static void ParallelStressTest<TSource>(TSource obj, Action<TSource> action, int numThread)
  55                 {
  56                         Thread[] threads = new Thread[numThread];
  57                         for (int i = 0; i < numThread; i++) {
  58                                 threads[i] = new Thread(new ThreadStart(delegate { action(obj); }));
  59                                 threads[i].Start();
  60                         }
  61
  62                         // Wait for the completion
  63                         for (int i = 0; i < numThread; i++)
  64                                 threads[i].Join();
  65                 }
  66
  67                 public static void ParallelAdder(IProducerConsumerCollection<int> collection, int numThread)
  68                 {
  69                         int startIndex = -10;
  70                         ParallelTestHelper.ParallelStressTest(collection, delegate (IProducerConsumerCollection<int> c) {
  71                                 int start = Interlocked.Add(ref startIndex, 10);
  72                                 for (int i = start; i < start + 10; i++) {
  73                                         c.TryAdd(i);
  74                                 }
  75                         }, numThread);
  76                 }
  77
  78                 public static void ParallelRemover(IProducerConsumerCollection<int> collection, int numThread, int times)
  79                 {
  80                         int t = -1;
  81                         ParallelTestHelper.ParallelStressTest(collection, delegate (IProducerConsumerCollection<int> c) {
  82                                 int num = Interlocked.Increment(ref t);
  83                                 int value;
  84                                 if (num < times)
  85                                         c.TryTake (out value);
  86                         }, numThread);
  87                 }
  88         }
  89 }
  90 #endif