mcs/class/System.Core/Test/System.Linq/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.Linq
  30 {
  31         public static class ParallelTestHelper
  32         {
  33 #if MOBILE
  34                 const int NumRun = 3;
  35 #else
  36                 const int NumRun = 11;
  37 #endif
  38
  39                 public static void Repeat (Action action)
  40                 {
  41                         Repeat (action, NumRun);
  42                 }
  43
  44                 public static void Repeat (Action action, int numRun)
  45                 {
  46                         for (int i = 0; i < numRun; i++) {
  47                           //Console.WriteLine ("Run " + i.ToString ());
  48                                 action ();
  49                         }
  50                 }
  51
  52                 public static void ParallelStressTest<TSource>(TSource obj, Action<TSource> action)
  53                 {
  54                         ParallelStressTest(obj, action, Environment.ProcessorCount + 2);
  55                 }
  56
  57                 public static void ParallelStressTest<TSource>(TSource obj, Action<TSource> action, int numThread)
  58                 {
  59                         Thread[] threads = new Thread[numThread];
  60                         for (int i = 0; i < numThread; i++) {
  61                                 threads[i] = new Thread(new ThreadStart(delegate { action(obj); }));
  62                                 threads[i].Start();
  63                         }
  64
  65                         // Wait for the completion
  66                         for (int i = 0; i < numThread; i++)
  67                                 threads[i].Join();
  68                 }
  69
  70                 public static void ParallelAdder(IProducerConsumerCollection<int> collection, int numThread)
  71                 {
  72                         int startIndex = -10;
  73                         ParallelTestHelper.ParallelStressTest(collection, delegate (IProducerConsumerCollection<int> c) {
  74                                 int start = Interlocked.Add(ref startIndex, 10);
  75                                 for (int i = start; i < start + 10; i++) {
  76                                         c.TryAdd(i);
  77                                 }
  78                         }, numThread);
  79                 }
  80
  81                 public static void ParallelRemover(IProducerConsumerCollection<int> collection, int numThread, int times)
  82                 {
  83                         int t = -1;
  84                         ParallelTestHelper.ParallelStressTest(collection, delegate (IProducerConsumerCollection<int> c) {
  85                                 int num = Interlocked.Increment(ref t);
  86                                 int value;
  87                                 if (num < times)
  88                                         c.TryTake (out value);
  89                         }, numThread);
  90                 }
  91         }
  92 }