1 | #region License Information |
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2 | /* |
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3 | * This file is part of SimSharp which is licensed under the MIT license. |
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4 | * See the LICENSE file in the project root for more information. |
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5 | */ |
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6 | #endregion |
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7 | |
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8 | using System; |
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9 | using System.Collections.Generic; |
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10 | using System.Linq; |
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11 | |
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12 | namespace SimSharp { |
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13 | /// <summary> |
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14 | /// A filter store is similar to a <see cref="Store"/>. |
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15 | /// However, in Get it is possible to specify the property of the item wished to retrieve. |
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16 | /// |
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17 | /// FilterStore holds a variable number of individual items. |
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18 | /// Put are always performed in FIFO order. |
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19 | /// Get are performed in FIFO order only when they match at least one item in the store. |
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20 | /// </summary> |
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21 | public class FilterStore { |
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22 | protected static readonly Func<object, bool> TrueFunc = _ => true; |
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23 | |
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24 | public int Capacity { get; protected set; } |
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25 | |
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26 | public int Count { get { return Items.Count; } } |
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27 | |
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28 | protected Simulation Environment { get; private set; } |
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29 | |
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30 | protected Queue<StorePut> PutQueue { get; private set; } |
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31 | protected LinkedList<FilterStoreGet> GetQueue { get; private set; } |
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32 | protected List<StoreItem> Items { get; private set; } |
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33 | protected List<Event> WhenNewQueue { get; private set; } |
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34 | protected List<Event> WhenAnyQueue { get; private set; } |
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35 | protected List<Event> WhenFullQueue { get; private set; } |
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36 | protected List<Event> WhenEmptyQueue { get; private set; } |
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37 | protected List<Event> WhenChangeQueue { get; private set; } |
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38 | |
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39 | public ITimeSeriesMonitor Utilization { get; set; } |
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40 | public ITimeSeriesMonitor WIP { get; set; } |
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41 | public ISampleMonitor LeadTime { get; set; } |
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42 | public ITimeSeriesMonitor PutQueueLength { get; set; } |
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43 | public ISampleMonitor PutWaitingTime { get; set; } |
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44 | public ITimeSeriesMonitor GetQueueLength { get; set; } |
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45 | public ISampleMonitor GetWaitingTime { get; set; } |
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46 | |
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47 | public FilterStore(Simulation environment, int capacity = int.MaxValue) { |
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48 | if (capacity <= 0) throw new ArgumentException("Capacity must be > 0", "capacity"); |
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49 | Environment = environment; |
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50 | Capacity = capacity; |
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51 | PutQueue = new Queue<StorePut>(); |
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52 | GetQueue = new LinkedList<FilterStoreGet>(); |
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53 | Items = new List<StoreItem>(); |
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54 | WhenNewQueue = new List<Event>(); |
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55 | WhenAnyQueue = new List<Event>(); |
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56 | WhenFullQueue = new List<Event>(); |
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57 | WhenEmptyQueue = new List<Event>(); |
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58 | WhenChangeQueue = new List<Event>(); |
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59 | } |
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60 | public FilterStore(Simulation environment, IEnumerable<object> items, int capacity = int.MaxValue) { |
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61 | if (capacity <= 0) throw new ArgumentException("Capacity must be > 0", "capacity"); |
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62 | Environment = environment; |
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63 | Capacity = capacity; |
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64 | PutQueue = new Queue<StorePut>(); |
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65 | GetQueue = new LinkedList<FilterStoreGet>(); |
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66 | Items = new List<StoreItem>(items.Select(x => new StoreItem() { AdmissionDate = Environment.Now, Item = x })); |
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67 | WhenNewQueue = new List<Event>(); |
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68 | WhenAnyQueue = new List<Event>(); |
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69 | WhenFullQueue = new List<Event>(); |
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70 | WhenEmptyQueue = new List<Event>(); |
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71 | WhenChangeQueue = new List<Event>(); |
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72 | if (capacity < Items.Count) throw new ArgumentException("There are more initial items than there is capacity.", "items"); |
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73 | } |
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74 | |
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75 | public virtual bool IsAvailable(Func<object, bool> filter) { |
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76 | return Items.Select(x => x.Item).Any(filter); |
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77 | } |
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78 | |
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79 | public virtual StorePut Put(object item) { |
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80 | var put = new StorePut(Environment, TriggerGet, item); |
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81 | PutQueue.Enqueue(put); |
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82 | TriggerPut(); |
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83 | return put; |
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84 | } |
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85 | |
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86 | public virtual FilterStoreGet Get(Func<object, bool> filter = null) { |
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87 | var get = new FilterStoreGet(Environment, TriggerPut, filter ?? TrueFunc); |
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88 | GetQueue.AddLast(get); |
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89 | TriggerGet(); |
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90 | return get; |
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91 | } |
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92 | |
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93 | public virtual Event WhenNew() { |
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94 | var whenNew = new Event(Environment); |
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95 | WhenNewQueue.Add(whenNew); |
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96 | return whenNew; |
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97 | } |
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98 | |
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99 | public virtual Event WhenAny() { |
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100 | var whenAny = new Event(Environment); |
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101 | WhenAnyQueue.Add(whenAny); |
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102 | TriggerWhenAny(); |
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103 | return whenAny; |
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104 | } |
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105 | |
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106 | public virtual Event WhenFull() { |
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107 | var whenFull = new Event(Environment); |
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108 | WhenFullQueue.Add(whenFull); |
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109 | TriggerWhenFull(); |
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110 | return whenFull; |
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111 | } |
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112 | |
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113 | public virtual Event WhenEmpty() { |
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114 | var whenEmpty = new Event(Environment); |
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115 | WhenEmptyQueue.Add(whenEmpty); |
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116 | TriggerWhenEmpty(); |
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117 | return whenEmpty; |
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118 | } |
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119 | |
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120 | public virtual Event WhenChange() { |
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121 | var whenChange = new Event(Environment); |
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122 | WhenChangeQueue.Add(whenChange); |
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123 | return whenChange; |
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124 | } |
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125 | |
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126 | protected virtual void DoPut(StorePut put) { |
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127 | if (Items.Count < Capacity) { |
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128 | PutWaitingTime?.Add(Environment.ToDouble(Environment.Now - put.Time)); |
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129 | Items.Add(new StoreItem() { AdmissionDate = Environment.Now, Item = put.Value }); |
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130 | put.Succeed(); |
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131 | } |
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132 | } |
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133 | |
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134 | protected virtual void DoGet(FilterStoreGet get) { |
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135 | for (int i = 0; i < Items.Count; i++) { |
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136 | var item = Items[i]; |
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137 | if (!get.Filter(item.Item)) continue; |
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138 | GetWaitingTime?.Add(Environment.ToDouble(Environment.Now - get.Time)); |
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139 | LeadTime?.Add(Environment.ToDouble(Environment.Now - item.AdmissionDate)); |
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140 | Items.RemoveAt(i); |
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141 | get.Succeed(item.Item); |
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142 | return; |
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143 | } |
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144 | } |
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145 | |
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146 | protected virtual void TriggerPut(Event @event = null) { |
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147 | while (PutQueue.Count > 0) { |
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148 | var put = PutQueue.Peek(); |
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149 | DoPut(put); |
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150 | if (put.IsTriggered) { |
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151 | PutQueue.Dequeue(); |
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152 | TriggerWhenNew(); |
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153 | TriggerWhenAny(); |
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154 | TriggerWhenFull(); |
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155 | TriggerWhenChange(); |
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156 | } else break; |
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157 | } |
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158 | Utilization?.UpdateTo(Count / (double)Capacity); |
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159 | WIP?.UpdateTo(Count + PutQueue.Count + GetQueue.Count); |
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160 | PutQueueLength?.UpdateTo(PutQueue.Count); |
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161 | } |
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162 | |
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163 | protected virtual void TriggerGet(Event @event = null) { |
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164 | var current = GetQueue.First; |
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165 | while (current != null) { |
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166 | var get = current.Value; |
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167 | DoGet(get); |
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168 | if (get.IsTriggered) { |
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169 | var next = current.Next; |
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170 | GetQueue.Remove(current); |
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171 | current = next; |
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172 | TriggerWhenEmpty(); |
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173 | TriggerWhenChange(); |
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174 | } else current = current.Next; |
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175 | if (Items.Count == 0) break; |
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176 | } |
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177 | Utilization?.UpdateTo(Count / (double)Capacity); |
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178 | WIP?.UpdateTo(Count + PutQueue.Count + GetQueue.Count); |
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179 | GetQueueLength?.UpdateTo(GetQueue.Count); |
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180 | } |
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181 | |
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182 | protected virtual void TriggerWhenNew() { |
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183 | if (WhenNewQueue.Count == 0) return; |
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184 | foreach (var evt in WhenNewQueue) |
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185 | evt.Succeed(); |
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186 | WhenNewQueue.Clear(); |
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187 | } |
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188 | |
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189 | protected virtual void TriggerWhenAny() { |
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190 | if (Items.Count > 0) { |
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191 | if (WhenAnyQueue.Count == 0) return; |
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192 | foreach (var evt in WhenAnyQueue) |
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193 | evt.Succeed(); |
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194 | WhenAnyQueue.Clear(); |
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195 | } |
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196 | } |
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197 | |
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198 | protected virtual void TriggerWhenFull() { |
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199 | if (Count == Capacity) { |
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200 | if (WhenFullQueue.Count == 0) return; |
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201 | foreach (var evt in WhenFullQueue) |
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202 | evt.Succeed(); |
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203 | WhenFullQueue.Clear(); |
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204 | } |
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205 | } |
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206 | |
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207 | protected virtual void TriggerWhenEmpty() { |
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208 | if (Count == 0) { |
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209 | if (WhenEmptyQueue.Count == 0) return; |
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210 | foreach (var evt in WhenEmptyQueue) |
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211 | evt.Succeed(); |
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212 | WhenEmptyQueue.Clear(); |
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213 | } |
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214 | } |
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215 | |
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216 | protected virtual void TriggerWhenChange() { |
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217 | if (WhenChangeQueue.Count == 0) return; |
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218 | foreach (var evt in WhenChangeQueue) |
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219 | evt.Succeed(); |
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220 | WhenChangeQueue.Clear(); |
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221 | } |
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222 | } |
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223 | } |
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