@@ -1,333 +1,333 | |||
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1 | 1 | using System; |
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2 | 2 | using Microsoft.VisualStudio.TestTools.UnitTesting; |
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3 | 3 | using System.Reflection; |
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4 | 4 | using System.Threading; |
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5 | 5 | using Implab.Parallels; |
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6 | 6 | |
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7 | 7 | namespace Implab.Test { |
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8 | 8 | [TestClass] |
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9 | 9 | public class AsyncTests { |
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10 | 10 | [TestMethod] |
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11 | 11 | public void ResolveTest() { |
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12 | 12 | int res = -1; |
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13 | 13 | var p = new Promise<int>(); |
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14 | 14 | p.Then(x => res = x); |
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15 | 15 | p.Resolve(100); |
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16 | 16 | |
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17 | 17 | Assert.AreEqual(100, res); |
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18 | 18 | } |
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19 | 19 | |
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20 | 20 | [TestMethod] |
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21 | 21 | public void RejectTest() { |
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22 | 22 | int res = -1; |
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23 | 23 | Exception err = null; |
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24 | 24 | |
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25 | 25 | var p = new Promise<int>(); |
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26 | 26 | p.Then(x => res = x, e => err = e); |
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27 | 27 | p.Reject(new ApplicationException("error")); |
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28 | 28 | |
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29 | 29 | Assert.AreEqual(res, -1); |
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30 | 30 | Assert.AreEqual(err.Message, "error"); |
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31 | 31 | |
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32 | 32 | } |
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33 | 33 | |
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34 | 34 | [TestMethod] |
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35 | 35 | public void JoinSuccessTest() { |
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36 | 36 | var p = new Promise<int>(); |
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37 | 37 | p.Resolve(100); |
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38 | 38 | Assert.AreEqual(p.Join(), 100); |
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39 | 39 | } |
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40 | 40 | |
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41 | 41 | [TestMethod] |
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42 | 42 | public void JoinFailTest() { |
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43 | 43 | var p = new Promise<int>(); |
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44 | 44 | p.Reject(new ApplicationException("failed")); |
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45 | 45 | |
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46 | 46 | try { |
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47 | 47 | p.Join(); |
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48 | 48 | throw new ApplicationException("WRONG!"); |
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49 | 49 | } catch (TargetInvocationException err) { |
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50 | 50 | Assert.AreEqual(err.InnerException.Message, "failed"); |
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51 | 51 | } catch { |
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52 | 52 | Assert.Fail("Got wrong excaption"); |
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53 | 53 | } |
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54 | 54 | } |
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55 | 55 | |
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56 | 56 | [TestMethod] |
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57 | 57 | public void MapTest() { |
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58 | 58 | var p = new Promise<int>(); |
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59 | 59 | |
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60 | 60 | var p2 = p.Map(x => x.ToString()); |
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61 | 61 | p.Resolve(100); |
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62 | 62 | |
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63 | 63 | Assert.AreEqual(p2.Join(), "100"); |
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64 | 64 | } |
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65 | 65 | |
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66 | 66 | [TestMethod] |
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67 | 67 | public void FixErrorTest() { |
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68 | 68 | var p = new Promise<int>(); |
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69 | 69 | |
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70 | 70 | var p2 = p.Error(e => 101); |
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71 | 71 | |
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72 | 72 | p.Reject(new Exception()); |
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73 | 73 | |
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74 | 74 | Assert.AreEqual(p2.Join(), 101); |
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75 | 75 | } |
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76 | 76 | |
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77 | 77 | [TestMethod] |
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78 | 78 | public void ChainTest() { |
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79 | 79 | var p1 = new Promise<int>(); |
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80 | 80 | |
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81 | 81 | var p3 = p1.Chain(x => { |
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82 | 82 | var p2 = new Promise<string>(); |
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83 | 83 | p2.Resolve(x.ToString()); |
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84 | 84 | return p2; |
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85 | 85 | }); |
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86 | 86 | |
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87 | 87 | p1.Resolve(100); |
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88 | 88 | |
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89 | 89 | Assert.AreEqual(p3.Join(), "100"); |
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90 | 90 | } |
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91 | 91 | |
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92 | 92 | [TestMethod] |
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93 | 93 | public void PoolTest() { |
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94 | 94 | var pid = Thread.CurrentThread.ManagedThreadId; |
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95 | 95 | var p = AsyncPool.Invoke(() => Thread.CurrentThread.ManagedThreadId); |
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96 | 96 | |
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97 | 97 | Assert.AreNotEqual(pid, p.Join()); |
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98 | 98 | } |
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99 | 99 | |
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100 | 100 | [TestMethod] |
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101 | 101 | public void WorkerPoolSizeTest() { |
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102 | 102 | var pool = new WorkerPool(5, 10, 0); |
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103 | 103 | |
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104 | 104 | Assert.AreEqual(5, pool.PoolSize); |
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105 | 105 | |
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106 | pool.Invoke(() => { Thread.Sleep(1000000); return 10; }); | |
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107 | pool.Invoke(() => { Thread.Sleep(1000000); return 10; }); | |
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108 | pool.Invoke(() => { Thread.Sleep(1000000); return 10; }); | |
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106 | pool.Invoke(() => { Thread.Sleep(100000000); return 10; }); | |
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107 | pool.Invoke(() => { Thread.Sleep(100000000); return 10; }); | |
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108 | pool.Invoke(() => { Thread.Sleep(100000000); return 10; }); | |
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109 | 109 | |
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110 | 110 | Assert.AreEqual(5, pool.PoolSize); |
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111 | 111 | |
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112 | 112 | for (int i = 0; i < 100; i++) |
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113 | pool.Invoke(() => { Thread.Sleep(1000000); return 10; }); | |
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114 |
Thread.Sleep( |
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113 | pool.Invoke(() => { Thread.Sleep(100000000); return 10; }); | |
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114 | Thread.Sleep(200); | |
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115 | 115 | Assert.AreEqual(10, pool.PoolSize); |
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116 | 116 | |
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117 | 117 | pool.Dispose(); |
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118 | 118 | } |
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119 | 119 | |
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120 | 120 | [TestMethod] |
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121 | 121 | public void WorkerPoolCorrectTest() { |
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122 | 122 | var pool = new WorkerPool(0,1000,100); |
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123 | 123 | |
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124 | 124 | int iterations = 1000; |
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125 | 125 | int pending = iterations; |
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126 | 126 | var stop = new ManualResetEvent(false); |
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127 | 127 | |
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128 | 128 | var count = 0; |
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129 | 129 | for (int i = 0; i < iterations; i++) { |
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130 | 130 | pool |
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131 | 131 | .Invoke(() => 1) |
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132 | 132 | .Then(x => Interlocked.Add(ref count, x)) |
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133 | 133 | .Then(x => Math.Log10(x)) |
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134 | 134 | .Anyway(() => { |
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135 | 135 | Interlocked.Decrement(ref pending); |
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136 | 136 | if (pending == 0) |
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137 | 137 | stop.Set(); |
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138 | 138 | }); |
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139 | 139 | } |
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140 | 140 | |
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141 | 141 | stop.WaitOne(); |
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142 | 142 | |
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143 | 143 | Assert.AreEqual(iterations, count); |
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144 | 144 | Console.WriteLine("Max threads: {0}", pool.MaxRunningThreads); |
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145 | 145 | pool.Dispose(); |
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146 | 146 | |
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147 | 147 | } |
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148 | 148 | |
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149 | 149 | [TestMethod] |
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150 | 150 | public void WorkerPoolDisposeTest() { |
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151 | 151 | var pool = new WorkerPool(5, 20); |
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152 | 152 | Assert.AreEqual(5, pool.PoolSize); |
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153 | 153 | pool.Dispose(); |
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154 | 154 | Thread.Sleep(500); |
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155 | 155 | Assert.AreEqual(0, pool.PoolSize); |
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156 | 156 | pool.Dispose(); |
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157 | 157 | } |
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158 | 158 | |
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159 | 159 | [TestMethod] |
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160 | 160 | public void MTQueueTest() { |
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161 | 161 | var queue = new MTQueue<int>(); |
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162 | 162 | int res; |
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163 | 163 | |
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164 | 164 | queue.Enqueue(10); |
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165 | 165 | Assert.IsTrue(queue.TryDequeue(out res)); |
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166 | 166 | Assert.AreEqual(10, res); |
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167 | 167 | Assert.IsFalse(queue.TryDequeue(out res)); |
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168 | 168 | |
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169 | 169 | for (int i = 0; i < 1000; i++) |
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170 | 170 | queue.Enqueue(i); |
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171 | 171 | |
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172 | 172 | for (int i = 0; i < 1000; i++) { |
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173 | 173 | queue.TryDequeue(out res); |
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174 | 174 | Assert.AreEqual(i, res); |
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175 | 175 | } |
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176 | 176 | |
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177 | 177 | int writers = 0; |
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178 | 178 | int readers = 0; |
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179 | 179 | var stop = new ManualResetEvent(false); |
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180 | 180 | int total = 0; |
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181 | 181 | |
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182 | 182 | int itemsPerWriter = 1000; |
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183 | 183 | int writersCount = 3; |
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184 | 184 | |
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185 | 185 | for (int i = 0; i < writersCount; i++) { |
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186 | 186 | Interlocked.Increment(ref writers); |
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187 | 187 | var wn = i; |
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188 | 188 | AsyncPool |
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189 | 189 | .InvokeNewThread(() => { |
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190 | 190 | for (int ii = 0; ii < itemsPerWriter; ii++) { |
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191 | 191 | queue.Enqueue(1); |
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192 | 192 | } |
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193 | 193 | return 1; |
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194 | 194 | }) |
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195 | 195 | .Anyway(() => Interlocked.Decrement(ref writers)); |
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196 | 196 | } |
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197 | 197 | |
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198 | 198 | for (int i = 0; i < 10; i++) { |
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199 | 199 | Interlocked.Increment(ref readers); |
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200 | 200 | var wn = i; |
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201 | 201 | AsyncPool |
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202 | 202 | .InvokeNewThread(() => { |
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203 | 203 | int t; |
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204 | 204 | do { |
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205 | 205 | while (queue.TryDequeue(out t)) |
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206 | 206 | Interlocked.Add(ref total, t); |
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207 | 207 | } while (writers > 0); |
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208 | 208 | return 1; |
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209 | 209 | }) |
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210 | 210 | .Anyway(() => { |
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211 | 211 | Interlocked.Decrement(ref readers); |
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212 | 212 | if (readers == 0) |
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213 | 213 | stop.Set(); |
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214 | 214 | }); |
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215 | 215 | } |
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216 | 216 | |
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217 | 217 | stop.WaitOne(); |
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218 | 218 | |
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219 | 219 | Assert.AreEqual(itemsPerWriter * writersCount, total); |
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220 | 220 | } |
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221 | 221 | |
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222 | 222 | [TestMethod] |
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223 | 223 | public void ParallelMapTest() { |
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224 | 224 | |
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225 | 225 | int count = 100000; |
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226 | 226 | |
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227 | 227 | double[] args = new double[count]; |
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228 | 228 | var rand = new Random(); |
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229 | 229 | |
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230 | 230 | for (int i = 0; i < count; i++) |
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231 | 231 | args[i] = rand.NextDouble(); |
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232 | 232 | |
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233 | 233 | var t = Environment.TickCount; |
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234 | 234 | var res = args.ParallelMap(x => Math.Sin(x*x), 4).Join(); |
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235 | 235 | |
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236 | 236 | Console.WriteLine("Map complete in {0} ms", Environment.TickCount - t); |
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237 | 237 | |
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238 | 238 | t = Environment.TickCount; |
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239 | 239 | for (int i = 0; i < count; i++) |
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240 | 240 | Assert.AreEqual(Math.Sin(args[i] * args[i]), res[i]); |
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241 | 241 | Console.WriteLine("Verified in {0} ms", Environment.TickCount - t); |
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242 | 242 | } |
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243 | 243 | |
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244 | 244 | [TestMethod] |
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245 | 245 | public void ChainedMapTest() { |
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246 | 246 | |
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247 |
using (var pool = new WorkerPool(0 |
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247 | using (var pool = new WorkerPool(4,4,0)) { | |
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248 | 248 | int count = 10000; |
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249 | 249 | |
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250 | 250 | double[] args = new double[count]; |
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251 | 251 | var rand = new Random(); |
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252 | 252 | |
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253 | 253 | for (int i = 0; i < count; i++) |
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254 | 254 | args[i] = rand.NextDouble(); |
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255 | 255 | |
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256 | 256 | var t = Environment.TickCount; |
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257 | 257 | var res = args |
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258 | 258 | .ChainedMap( |
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259 | 259 | x => pool.Invoke( |
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260 | 260 | () => Math.Sin(x * x) |
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261 | 261 | ), |
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262 | 262 | 4 |
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263 | 263 | ) |
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264 | 264 | .Join(); |
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265 | 265 | |
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266 | 266 | Console.WriteLine("Map complete in {0} ms", Environment.TickCount - t); |
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267 | 267 | |
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268 | 268 | t = Environment.TickCount; |
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269 | 269 | for (int i = 0; i < count; i++) |
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270 | 270 | Assert.AreEqual(Math.Sin(args[i] * args[i]), res[i]); |
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271 | 271 | Console.WriteLine("Verified in {0} ms", Environment.TickCount - t); |
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272 | 272 | Console.WriteLine("Max workers: {0}", pool.MaxRunningThreads); |
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273 | 273 | } |
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274 | 274 | } |
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275 | 275 | |
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276 | 276 | [TestMethod] |
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277 | 277 | public void ParallelForEachTest() { |
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278 | 278 | |
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279 | 279 | int count = 100000; |
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280 | 280 | |
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281 | 281 | int[] args = new int[count]; |
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282 | 282 | var rand = new Random(); |
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283 | 283 | |
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284 | 284 | for (int i = 0; i < count; i++) |
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285 | 285 | args[i] = (int)(rand.NextDouble() * 100); |
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286 | 286 | |
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287 | 287 | int result = 0; |
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288 | 288 | |
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289 | 289 | var t = Environment.TickCount; |
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290 | 290 | args.ParallelForEach(x => Interlocked.Add(ref result, x), 4).Join(); |
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291 | 291 | |
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292 | 292 | Console.WriteLine("Iteration complete in {0} ms, result: {1}", Environment.TickCount - t, result); |
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293 | 293 | |
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294 | 294 | int result2 = 0; |
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295 | 295 | |
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296 | 296 | t = Environment.TickCount; |
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297 | 297 | for (int i = 0; i < count; i++) |
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298 | 298 | result2 += args[i]; |
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299 | 299 | Assert.AreEqual(result2, result); |
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300 | 300 | Console.WriteLine("Verified in {0} ms", Environment.TickCount - t); |
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301 | 301 | } |
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302 | 302 | |
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303 | 303 | [TestMethod] |
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304 | 304 | public void ComplexCase1Test() { |
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305 | 305 | var flags = new bool[3]; |
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306 | 306 | |
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307 | 307 | // op1 (aync 200ms) => op2 (async 200ms) => op3 (sync map) |
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308 | 308 | |
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309 | 309 | var p = PromiseHelper |
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310 | 310 | .Sleep(200, "Alan") |
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311 | 311 | .Cancelled(() => flags[0] = true) |
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312 | 312 | .Chain(x => |
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313 | 313 | PromiseHelper |
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314 | 314 | .Sleep(200, "Hi, " + x) |
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315 | 315 | .Map(y => y) |
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316 | 316 | .Cancelled(() => flags[1] = true) |
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317 | 317 | ) |
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318 | 318 | .Cancelled(() => flags[2] = true); |
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319 | 319 | Thread.Sleep(300); |
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320 | 320 | p.Cancel(); |
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321 | 321 | try { |
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322 | 322 | Assert.AreEqual(p.Join(), "Hi, Alan"); |
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323 | 323 | Assert.Fail("Shouldn't get here"); |
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324 | 324 | } catch (OperationCanceledException) { |
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325 | 325 | } |
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326 | 326 | |
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327 | 327 | Assert.IsFalse(flags[0]); |
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328 | 328 | Assert.IsTrue(flags[1]); |
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329 | 329 | Assert.IsTrue(flags[2]); |
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330 | 330 | } |
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331 | 331 | } |
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332 | 332 | } |
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333 | 333 |
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1 | NO CONTENT: modified file, binary diff hidden |
@@ -1,302 +1,330 | |||
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1 | 1 | using System; |
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2 | 2 | using System.Collections.Generic; |
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3 | 3 | using System.Linq; |
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4 | 4 | using System.Text; |
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5 | 5 | using System.Threading; |
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6 | 6 | using System.Diagnostics; |
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7 | 7 | |
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8 | 8 | namespace Implab.Parallels { |
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9 | 9 | public abstract class DispatchPool<TUnit> : IDisposable { |
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10 | 10 | readonly int m_minThreads; |
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11 | 11 | readonly int m_maxThreads; |
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12 | 12 | |
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13 | 13 | int m_createdThreads = 0; // the current size of the pool |
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14 | 14 | int m_activeThreads = 0; // the count of threads which are active |
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15 | 15 | int m_sleepingThreads = 0; // the count of currently inactive threads |
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16 | 16 | int m_maxRunningThreads = 0; // the meximum reached size of the pool |
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17 | 17 | int m_exitRequired = 0; // the pool is going to shutdown, all unused workers are released |
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18 | 18 | int m_releaseTimeout = 100; // the timeout while the working thread will wait for the new tasks before exit |
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19 | 19 | int m_wakeEvents = 0; // the count of wake events |
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20 | 20 | |
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21 | 21 | AutoResetEvent m_hasTasks = new AutoResetEvent(false); |
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22 | 22 | |
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23 | 23 | protected DispatchPool(int min, int max) { |
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24 | 24 | if (min < 0) |
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25 | 25 | throw new ArgumentOutOfRangeException("min"); |
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26 | 26 | if (max <= 0) |
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27 | 27 | throw new ArgumentOutOfRangeException("max"); |
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28 | 28 | |
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29 | 29 | if (min > max) |
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30 | 30 | min = max; |
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31 | 31 | m_minThreads = min; |
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32 | 32 | m_maxThreads = max; |
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33 | 33 | } |
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34 | 34 | |
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35 | 35 | protected DispatchPool(int threads) |
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36 | 36 | : this(threads, threads) { |
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37 | 37 | } |
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38 | 38 | |
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39 | 39 | protected DispatchPool() { |
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40 | 40 | int maxThreads, maxCP; |
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41 | 41 | ThreadPool.GetMaxThreads(out maxThreads, out maxCP); |
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42 | 42 | |
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43 | 43 | m_minThreads = 0; |
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44 | 44 | m_maxThreads = maxThreads; |
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45 | 45 | } |
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46 | 46 | |
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47 | 47 | protected void InitPool() { |
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48 | 48 | for (int i = 0; i < m_minThreads; i++) |
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49 | 49 | StartWorker(); |
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50 | 50 | } |
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51 | 51 | |
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52 | 52 | public int PoolSize { |
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53 | 53 | get { |
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54 | 54 | return m_createdThreads; |
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55 | 55 | } |
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56 | 56 | } |
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57 | 57 | |
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58 | 58 | public int ActiveThreads { |
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59 | 59 | get { |
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60 | 60 | return m_activeThreads; |
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61 | 61 | } |
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62 | 62 | } |
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63 | 63 | |
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64 | 64 | public int MaxRunningThreads { |
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65 | 65 | get { |
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66 | 66 | return m_maxRunningThreads; |
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67 | 67 | } |
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68 | 68 | } |
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69 | 69 | |
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70 | 70 | protected bool IsDisposed { |
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71 | 71 | get { |
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72 | 72 | return m_exitRequired != 0; |
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73 | 73 | } |
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74 | 74 | } |
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75 | 75 | |
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76 | 76 | protected abstract bool TryDequeue(out TUnit unit); |
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77 | 77 | |
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78 | 78 | #region thread execution traits |
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79 | 79 | int SignalThread() { |
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80 | 80 | var signals = Interlocked.Increment(ref m_wakeEvents); |
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81 | 81 | if(signals == 1) |
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82 | 82 | m_hasTasks.Set(); |
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83 | 83 | return signals; |
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84 | 84 | } |
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85 | 85 | |
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86 | bool FetchSignalOrWait(int timeout) { | |
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87 | var start = Environment.TickCount; | |
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88 | ||
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89 | // ΠΎΠ·Π½Π°ΡΠ°Π΅Ρ, ΡΡΠΎ ΠΏΠΎΡΠΎΠΊ Π²Π»Π°Π΄Π΅Π΅Ρ Π±Π»ΠΎΠΊΠΈΡΠΎΠ²ΠΊΠΎΠΉ ΠΈ ΠΏΡΠΈ ΡΡΠΏΠ΅ΡΠ½ΠΎΠΌ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΠΈ ΡΠΈΠ³Π½Π°Π»Π° Π΄ΠΎΠ»ΠΆΠ΅Π½ | |
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90 | // Π΅Π΅ Π²Π΅ΡΠ½ΡΡΡ, ΡΡΠΎΠ±Ρ Π΄ΡΡΠ³ΠΎΠΉ ΠΎΠΆΠΈΠ΄Π°ΡΡΠΈΠΉ ΠΏΠΎΡΠΎΠΊ ΡΠΌΠΎΠ³ | |
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91 | bool hasLock = false; | |
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92 | do { | |
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93 | int signals; | |
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94 | do { | |
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95 | signals = m_wakeEvents; | |
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96 | if (signals == 0) | |
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97 | break; | |
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98 | } while (Interlocked.CompareExchange(ref m_wakeEvents, signals - 1, signals) != signals); | |
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99 | ||
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100 | if (signals >= 1) { | |
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101 | if (signals > 1 && hasLock) | |
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102 | m_hasTasks.Set(); | |
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103 | return true; | |
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104 | } | |
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105 | ||
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106 | if (timeout != -1) | |
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107 | timeout = Math.Max(0, timeout - (Environment.TickCount - start)); | |
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108 | ||
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109 | // Π΅ΡΠ»ΠΈ ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Π±ΠΎΠ»ΡΡΠ΅ Π½Π΅ ΠΎΡΡΠ°Π»ΠΎΡΡ, ΡΠΎ ΠΏΠ΅ΡΠ²ΡΠΉ ΠΏΠΎΡΠΎΠΊ, ΠΊΠΎΡΠΎΡΡΠΉ Π΄ΠΎΡΠ΅Π» ΡΡΠ΄Π° ΡΠ±ΡΠΎΡΠΈΡ ΡΠΎΠ±ΡΡΠΈΠ΅ | |
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110 | // ΠΈ ΡΠΉΠ΄Π΅Ρ Π½Π° ΠΏΡΡΡΠΎΠΉ ΡΠΈΠΊΠ», ΠΏΠΎΡΠ»Π΅ ΡΠ΅Π³ΠΎ Π·Π°Π±Π»ΠΎΠΊΠΈΡΡΠ΅ΡΡΡ | |
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111 | ||
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112 | hasLock = true; | |
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113 | } while (m_hasTasks.WaitOne(timeout)); | |
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114 | ||
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115 | return false; | |
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116 | } | |
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117 | ||
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86 | 118 | bool Sleep(int timeout) { |
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87 | 119 | Interlocked.Increment(ref m_sleepingThreads); |
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88 |
if ( |
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89 | // this is autoreset event, only one thread can run this block simultaneously | |
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90 | var sleeping = Interlocked.Decrement(ref m_sleepingThreads); | |
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91 | if (Interlocked.Decrement(ref m_wakeEvents) > 0) | |
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92 | m_hasTasks.Set(); // wake next worker | |
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93 | ||
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120 | if (FetchSignalOrWait(timeout)) { | |
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121 | Interlocked.Decrement(ref m_sleepingThreads); | |
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94 | 122 | return true; |
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95 | 123 | } else { |
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96 | 124 | Interlocked.Decrement(ref m_sleepingThreads); |
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97 | 125 | return false; |
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98 | 126 | } |
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99 | 127 | } |
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100 | 128 | #endregion |
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101 | 129 | |
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102 | 130 | /// <summary> |
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103 | 131 | /// ΠΠ°ΠΏΡΡΠΊΠ°Π΅Ρ Π»ΠΈΠ±ΠΎ Π½ΠΎΠ²ΡΠΉ ΠΏΠΎΡΠΎΠΊ, Π΅ΡΠ»ΠΈ ΡΠ°Π½ΡΡΠ΅ Π½Π΅ Π±ΡΠ»ΠΎ Π½ΠΈ ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΠ°, Π»ΠΈΠ±ΠΎ ΡΡΡΠ°Π½Π°Π²Π»ΠΈΠ²Π°Π΅Ρ ΡΠΎΠ±ΡΡΠΈΠ΅ ΠΏΡΠΎΠ±ΡΠΆΠ΄Π΅Π½ΠΈΠ΅ ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΠΏΡΡΠ΅Π³ΠΎ ΠΏΠΎΡΠΎΠΊΠ° |
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104 | 132 | /// </summary> |
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105 | 133 | protected void GrowPool() { |
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106 | 134 | if (m_exitRequired != 0) |
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107 | 135 | return; |
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108 | 136 | if (m_sleepingThreads > m_wakeEvents) { |
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137 | //Console.WriteLine("Waking threads (sleeps {0}, pending {1})", m_sleepingThreads, m_wakeEvents); | |
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138 | ||
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109 | 139 | // all sleeping threads may gone |
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110 | 140 | SignalThread(); // wake a sleeping thread; |
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111 | 141 | |
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112 | 142 | // we can't check whether signal has been processed |
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113 | 143 | // anyway it may take some time for the thread to start |
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114 | 144 | // we will ensure that at least one thread is running |
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115 | 145 | |
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116 | 146 | if (AllocateThreadSlot(1)) { |
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117 | 147 | // if there were no threads in the pool |
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118 | 148 | var worker = new Thread(this.Worker); |
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119 | 149 | worker.IsBackground = true; |
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120 | 150 | worker.Start(); |
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121 | 151 | } |
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122 | 152 | } else { |
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123 | 153 | // if there is no sleeping threads in the pool |
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124 | 154 | StartWorker(); |
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125 | 155 | } |
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126 | 156 | } |
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127 | 157 | |
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128 | 158 | private bool Suspend() { |
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129 | 159 | //no tasks left, exit if the thread is no longer needed |
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130 | 160 | bool last; |
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131 | 161 | bool requestExit; |
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132 | 162 | |
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133 | ||
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134 | ||
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135 | 163 | // if threads have a timeout before releasing |
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136 | 164 | if (m_releaseTimeout > 0) |
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137 | 165 | requestExit = !Sleep(m_releaseTimeout); |
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138 | 166 | else |
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139 | 167 | requestExit = true; |
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140 | 168 | |
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141 | 169 | if (!requestExit) |
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142 | 170 | return true; |
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143 | 171 | |
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144 | 172 | // release unsused thread |
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145 | 173 | if (requestExit && ReleaseThreadSlot(out last)) { |
|
146 | 174 | // in case at the moment the last thread was being released |
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147 | 175 | // a new task was added to the queue, we need to try |
|
148 | 176 | // to revoke the thread to avoid the situation when the task is left unprocessed |
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149 | 177 | if (last && Sleep(0)) { // Sleep(0) will fetch pending task or will return false |
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150 | 178 | if (AllocateThreadSlot(1)) |
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151 | 179 | return true; // spin again... |
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152 | 180 | else |
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153 | 181 | SignalThread(); // since Sleep(0) has fetched the signal we neet to reschedule it |
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154 | 182 | |
|
155 | 183 | } |
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156 | 184 | |
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157 | 185 | return false; |
|
158 | 186 | } |
|
159 | 187 | |
|
160 | 188 | // wait till infinity |
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161 | 189 | Sleep(-1); |
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162 | 190 | |
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163 | 191 | return true; |
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164 | 192 | } |
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165 | 193 | |
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166 | 194 | #region thread slots traits |
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167 | 195 | |
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168 | 196 | bool AllocateThreadSlot() { |
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169 | 197 | int current; |
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170 | 198 | // use spins to allocate slot for the new thread |
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171 | 199 | do { |
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172 | 200 | current = m_createdThreads; |
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173 | 201 | if (current >= m_maxThreads || m_exitRequired != 0) |
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174 | 202 | // no more slots left or the pool has been disposed |
|
175 | 203 | return false; |
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176 | 204 | } while (current != Interlocked.CompareExchange(ref m_createdThreads, current + 1, current)); |
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177 | 205 | |
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178 | 206 | UpdateMaxThreads(current + 1); |
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179 | 207 | |
|
180 | 208 | return true; |
|
181 | 209 | } |
|
182 | 210 | |
|
183 | 211 | bool AllocateThreadSlot(int desired) { |
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184 | 212 | if (desired - 1 != Interlocked.CompareExchange(ref m_createdThreads, desired, desired - 1)) |
|
185 | 213 | return false; |
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186 | 214 | |
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187 | 215 | UpdateMaxThreads(desired); |
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188 | 216 | |
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189 | 217 | return true; |
|
190 | 218 | } |
|
191 | 219 | |
|
192 | 220 | bool ReleaseThreadSlot(out bool last) { |
|
193 | 221 | last = false; |
|
194 | 222 | int current; |
|
195 | 223 | // use spins to release slot for the new thread |
|
196 | 224 | do { |
|
197 | 225 | current = m_createdThreads; |
|
198 | 226 | if (current <= m_minThreads && m_exitRequired == 0) |
|
199 | 227 | // the thread is reserved |
|
200 | 228 | return false; |
|
201 | 229 | } while (current != Interlocked.CompareExchange(ref m_createdThreads, current - 1, current)); |
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202 | 230 | |
|
203 | 231 | last = (current == 1); |
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204 | 232 | |
|
205 | 233 | return true; |
|
206 | 234 | } |
|
207 | 235 | |
|
208 | 236 | /// <summary> |
|
209 | 237 | /// releases thread slot unconditionally, used during cleanup |
|
210 | 238 | /// </summary> |
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211 | 239 | /// <returns>true - no more threads left</returns> |
|
212 | 240 | bool ReleaseThreadSlotAnyway() { |
|
213 | 241 | var left = Interlocked.Decrement(ref m_createdThreads); |
|
214 | 242 | return left == 0; |
|
215 | 243 | } |
|
216 | 244 | |
|
217 | 245 | void UpdateMaxThreads(int count) { |
|
218 | 246 | int max; |
|
219 | 247 | do { |
|
220 | 248 | max = m_maxRunningThreads; |
|
221 | 249 | if (max >= count) |
|
222 | 250 | break; |
|
223 | 251 | } while(max != Interlocked.CompareExchange(ref m_maxRunningThreads, count, max)); |
|
224 | 252 | } |
|
225 | 253 | |
|
226 | 254 | #endregion |
|
227 | 255 | |
|
228 | 256 | bool StartWorker() { |
|
229 | 257 | if (AllocateThreadSlot()) { |
|
230 | 258 | // slot successfully allocated |
|
231 | 259 | var worker = new Thread(this.Worker); |
|
232 | 260 | worker.IsBackground = true; |
|
233 | 261 | worker.Start(); |
|
234 | 262 | |
|
235 | 263 | return true; |
|
236 | 264 | } else { |
|
237 | 265 | return false; |
|
238 | 266 | } |
|
239 | 267 | } |
|
240 | 268 | |
|
241 | 269 | protected abstract void InvokeUnit(TUnit unit); |
|
242 | 270 | |
|
243 | 271 | void Worker() { |
|
244 | 272 | TUnit unit; |
|
273 | //Console.WriteLine("{0}: Active", Thread.CurrentThread.ManagedThreadId); | |
|
245 | 274 | Interlocked.Increment(ref m_activeThreads); |
|
246 | Sleep(0); // remove wake request if the new thread is started | |
|
247 | 275 | do { |
|
248 | 276 | // exit if requested |
|
249 | 277 | if (m_exitRequired != 0) { |
|
250 | 278 | // release the thread slot |
|
251 | 279 | Interlocked.Decrement(ref m_activeThreads); |
|
252 | 280 | if (ReleaseThreadSlotAnyway()) // it was the last worker |
|
253 | 281 | m_hasTasks.Dispose(); |
|
254 | 282 | else |
|
255 | 283 | SignalThread(); // wake next worker |
|
256 | 284 | unit = default(TUnit); |
|
257 | 285 | break; |
|
258 | 286 | } |
|
259 | 287 | |
|
260 | 288 | // fetch task |
|
261 | 289 | if (TryDequeue(out unit)) { |
|
262 | 290 | InvokeUnit(unit); |
|
263 | 291 | continue; |
|
264 | 292 | } |
|
265 | 293 | |
|
266 | 294 | Interlocked.Decrement(ref m_activeThreads); |
|
267 | 295 | |
|
268 | 296 | // entering suspend state |
|
269 | 297 | // keep this thread and wait |
|
270 | 298 | if (!Suspend()) |
|
271 | 299 | break; |
|
272 | ||
|
300 | //Console.WriteLine("{0}: Awake", Thread.CurrentThread.ManagedThreadId); | |
|
273 | 301 | Interlocked.Increment(ref m_activeThreads); |
|
274 | 302 | } while (true); |
|
275 | ||
|
303 | //Console.WriteLine("{0}: Exited", Thread.CurrentThread.ManagedThreadId); | |
|
276 | 304 | } |
|
277 | 305 | |
|
278 | 306 | protected virtual void Dispose(bool disposing) { |
|
279 | 307 | if (disposing) { |
|
280 | 308 | if (m_exitRequired == 0) { |
|
281 | 309 | if (Interlocked.CompareExchange(ref m_exitRequired, 1, 0) != 0) |
|
282 | 310 | return; |
|
283 | 311 | |
|
284 | 312 | // wake sleeping threads |
|
285 | 313 | if (m_createdThreads > 0) |
|
286 | 314 | SignalThread(); |
|
287 | 315 | else |
|
288 | 316 | m_hasTasks.Dispose(); |
|
289 | 317 | GC.SuppressFinalize(this); |
|
290 | 318 | } |
|
291 | 319 | } |
|
292 | 320 | } |
|
293 | 321 | |
|
294 | 322 | public void Dispose() { |
|
295 | 323 | Dispose(true); |
|
296 | 324 | } |
|
297 | 325 | |
|
298 | 326 | ~DispatchPool() { |
|
299 | 327 | Dispose(false); |
|
300 | 328 | } |
|
301 | 329 | } |
|
302 | 330 | } |
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