mcs/class/corlib/Test/System.Threading/SemaphoreSlimTests.cs

   1 #if NET_4_0
   2 // SemaphoreSlimTests.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.Linq;
  28 using System.Threading;
  29
  30 using MonoTests.System.Threading.Tasks;
  31
  32 using NUnit.Framework;
  33
  34 namespace MonoTests.System.Threading
  35 {
  36         [TestFixture]
  37         public class SemaphoreSlimTests
  38         {
  39                 SemaphoreSlim sem;
  40                 SemaphoreSlim semMax;
  41
  42                 [SetUp]
  43                 public void Setup()
  44                 {
  45                         sem = new SemaphoreSlim(5);
  46                         semMax = new SemaphoreSlim(5, 5);
  47                 }
  48
  49                 [Test]
  50                 public void CurrentCountMaxTestCase()
  51                 {
  52                         semMax.Wait();
  53                         semMax.Release(3);
  54                         Assert.AreEqual(5, semMax.CurrentCount);
  55                 }
  56
  57                 [Test]
  58                 public void CurrentCountTestCase()
  59                 {
  60                         sem.Wait();
  61                         sem.Wait();
  62                         sem.Release();
  63                         Assert.AreEqual(4, sem.CurrentCount);
  64                 }
  65
  66                 [Test]
  67                 public void WaitStressTest()
  68                 {
  69                         int count = -1;
  70                         bool[] array = new bool[7];
  71                         int worker = 0;
  72                         bool coherent = true;
  73
  74                         ParallelTestHelper.ParallelStressTest (sem, delegate (SemaphoreSlim s) {
  75                                 int index = Interlocked.Increment (ref count);
  76                                 s.Wait ();
  77                                 if (Interlocked.Increment (ref worker) > 5)
  78                                         coherent = false;
  79                                 Thread.Sleep (40);
  80                                 Interlocked.Decrement (ref worker);
  81                                 s.Release ();
  82                                 array[index] = true;
  83                         }, 7);
  84
  85                         bool result = array.Aggregate ((acc, e) => acc && e);
  86
  87                         Assert.IsTrue (result, "#1");
  88                         Assert.AreEqual (5, sem.CurrentCount, "#2");
  89                         Assert.IsTrue (coherent, "#3");
  90                 }
  91         }
  92 }
  93 #endif