mcs/class/System/Test/System.Collections.Concurrent/ParallelTestHelper.cs

   1 // TestHelper.cs
   2 //
   3 // Copyright (c) 2008 Jérémie "Garuma" Laval
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining a copy
   6 // of this software and associated documentation files (the "Software"), to deal
   7 // in the Software without restriction, including without limitation the rights
   8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9 // copies of the Software, and to permit persons to whom the Software is
  10 // furnished to do so, subject to the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be included in
  13 // all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21 // THE SOFTWARE.
  22 //
  23 //
  24
  25 using System;
  26 using System.Threading;
  27 using System.Collections.Concurrent;
  28
  29 namespace MonoTests.System.Collections.Concurrent
  30 {
  31         static class ParallelTestHelper
  32         {
  33                 const int NumRun = 500;
  34
  35                 public static void Repeat (Action action)
  36                 {
  37                         Repeat (action, NumRun);
  38                 }
  39
  40                 public static void Repeat (Action action, int numRun)
  41                 {
  42                         for (int i = 0; i < numRun; i++) {
  43                                 action ();
  44                         }
  45                 }
  46
  47                 public static void ParallelStressTest<TSource>(TSource obj, Action<TSource> action)
  48                 {
  49                         ParallelStressTest(obj, action, Environment.ProcessorCount + 2);
  50                 }
  51
  52                 public static void ParallelStressTest<TSource>(TSource obj, Action<TSource> action, int numThread)
  53                 {
  54                         Thread[] threads = new Thread[numThread];
  55                         for (int i = 0; i < numThread; i++) {
  56                                 threads[i] = new Thread(new ThreadStart(delegate { action(obj); }));
  57                                 threads[i].Start();
  58                         }
  59
  60                         // Wait for the completion
  61                         for (int i = 0; i < numThread; i++)
  62                                 threads[i].Join();
  63                 }
  64
  65                 public static void ParallelAdder(IProducerConsumerCollection<int> collection, int numThread)
  66                 {
  67                         int startIndex = -10;
  68                         ParallelTestHelper.ParallelStressTest(collection, delegate (IProducerConsumerCollection<int> c) {
  69                                 int start = Interlocked.Add(ref startIndex, 10);
  70                                 for (int i = start; i < start + 10; i++) {
  71                                         c.TryAdd(i);
  72                                 }
  73                         }, numThread);
  74                 }
  75
  76                 public static void ParallelRemover(IProducerConsumerCollection<int> collection, int numThread, int times)
  77                 {
  78                         int t = -1;
  79                         ParallelTestHelper.ParallelStressTest(collection, delegate (IProducerConsumerCollection<int> c) {
  80                                 int num = Interlocked.Increment(ref t);
  81                                 int value;
  82                                 if (num < times)
  83                                         c.TryTake (out value);
  84                         }, numThread);
  85                 }
  86         }
  87 }