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 #if MOBILE
  35                 const int NumRun = 3;
  36 #else
  37                 const int NumRun = 11;
  38 #endif
  39
  40                 public static void Repeat (Action action)
  41                 {
  42                         Repeat (action, NumRun);
  43                 }
  44
  45                 public static void Repeat (Action action, int numRun)
  46                 {
  47                         for (int i = 0; i < numRun; i++) {
  48                           //Console.WriteLine ("Run " + i.ToString ());
  49                                 action ();
  50                         }
  51                 }
  52
  53                 public static void ParallelStressTest<TSource>(TSource obj, Action<TSource> action)
  54                 {
  55                         ParallelStressTest(obj, action, Environment.ProcessorCount + 2);
  56                 }
  57
  58                 public static void ParallelStressTest<TSource>(TSource obj, Action<TSource> action, int numThread)
  59                 {
  60                         Thread[] threads = new Thread[numThread];
  61                         for (int i = 0; i < numThread; i++) {
  62                                 threads[i] = new Thread(new ThreadStart(delegate { action(obj); }));
  63                                 threads[i].Start();
  64                         }
  65
  66                         // Wait for the completion
  67                         for (int i = 0; i < numThread; i++)
  68                                 threads[i].Join();
  69                 }
  70
  71                 public static void ParallelAdder(IProducerConsumerCollection<int> collection, int numThread)
  72                 {
  73                         int startIndex = -10;
  74                         ParallelTestHelper.ParallelStressTest(collection, delegate (IProducerConsumerCollection<int> c) {
  75                                 int start = Interlocked.Add(ref startIndex, 10);
  76                                 for (int i = start; i < start + 10; i++) {
  77                                         c.TryAdd(i);
  78                                 }
  79                         }, numThread);
  80                 }
  81
  82                 public static void ParallelRemover(IProducerConsumerCollection<int> collection, int numThread, int times)
  83                 {
  84                         int t = -1;
  85                         ParallelTestHelper.ParallelStressTest(collection, delegate (IProducerConsumerCollection<int> c) {
  86                                 int num = Interlocked.Increment(ref t);
  87                                 int value;
  88                                 if (num < times)
  89                                         c.TryTake (out value);
  90                         }, numThread);
  91                 }
  92         }
  93 }
  94 #endif