corrade-vassal – Blame information for rev 14
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13 | eva | 1 | /////////////////////////////////////////////////////////////////////////// |
2 | // Copyright (C) Wizardry and Steamworks 2013 - License: GNU GPLv3 // |
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3 | // Please see: http://www.gnu.org/licenses/gpl.html for legal details, // |
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4 | // rights of fair usage, the disclaimer and warranty conditions. // |
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5 | /////////////////////////////////////////////////////////////////////////// |
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6 | |||
7 | using System; |
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8 | using System.Collections.Generic; |
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9 | using System.Diagnostics; |
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10 | using System.Linq; |
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11 | using System.Threading; |
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12 | using System.Threading.Tasks; |
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13 | using System.Xml.Serialization; |
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14 | |||
15 | namespace wasSharp |
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16 | { |
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17 | public class Time |
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18 | { |
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19 | public delegate void TimerCallback(object state); |
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20 | |||
14 | zed | 21 | /// <summary> |
22 | /// Convert an Unix timestamp to a DateTime structure. |
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23 | /// </summary> |
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24 | /// <param name="unixTimestamp">the Unix timestamp to convert</param> |
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25 | /// <returns>the DateTime structure</returns> |
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26 | /// <remarks>the function assumes UTC time</remarks> |
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27 | public static DateTime UnixTimestampToDateTime(uint unixTimestamp) |
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28 | { |
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29 | return new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).AddSeconds(unixTimestamp).ToUniversalTime(); |
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30 | } |
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31 | |||
32 | /// <summary> |
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33 | /// Convert a DateTime structure to a Unix timestamp. |
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34 | /// </summary> |
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35 | /// <param name="dateTime">the DateTime structure to convert</param> |
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36 | /// <returns>the Unix timestamp</returns> |
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37 | /// <remarks>the function assumes UTC time</remarks> |
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38 | public static uint DateTimeToUnixTimestamp(DateTime dateTime) |
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39 | { |
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40 | return (uint) (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc)).TotalSeconds; |
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41 | } |
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42 | |||
13 | eva | 43 | public sealed class Timer : IDisposable |
44 | { |
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45 | private static readonly Task CompletedTask = Task.FromResult(false); |
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46 | private readonly TimerCallback Callback; |
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47 | private readonly object State; |
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48 | private Task Delay; |
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49 | private bool Disposed; |
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50 | private int Period; |
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51 | private CancellationTokenSource TokenSource; |
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52 | |||
53 | public Timer(TimerCallback callback, object state, int dueTime, int period) |
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54 | { |
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55 | Callback = callback; |
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56 | State = state; |
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57 | Period = period; |
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58 | Reset(dueTime); |
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59 | } |
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60 | |||
61 | public Timer(TimerCallback callback, object state, TimeSpan dueTime, TimeSpan period) |
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62 | : this(callback, state, (int) dueTime.TotalMilliseconds, (int) period.TotalMilliseconds) |
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63 | { |
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64 | } |
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65 | |||
66 | public void Dispose() |
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67 | { |
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68 | Dispose(true); |
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69 | GC.SuppressFinalize(this); |
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70 | } |
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71 | |||
72 | ~Timer() |
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73 | { |
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74 | Dispose(false); |
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75 | } |
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76 | |||
77 | private void Dispose(bool cleanUpManagedObjects) |
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78 | { |
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79 | if (cleanUpManagedObjects) |
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80 | Cancel(); |
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81 | Disposed = true; |
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82 | } |
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83 | |||
84 | public void Change(int dueTime, int period) |
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85 | { |
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86 | Period = period; |
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87 | Reset(dueTime); |
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88 | } |
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89 | |||
90 | public void Change(TimeSpan dueTime, TimeSpan period) |
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91 | { |
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92 | Change((int) dueTime.TotalMilliseconds, (int) period.TotalMilliseconds); |
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93 | } |
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94 | |||
95 | private void Reset(int due) |
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96 | { |
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97 | Cancel(); |
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98 | if (due >= 0) |
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99 | { |
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100 | TokenSource = new CancellationTokenSource(); |
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101 | Action tick = null; |
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102 | tick = () => |
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103 | { |
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104 | Task.Run(() => Callback(State)); |
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105 | if (Disposed || Period < 0) return; |
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106 | Delay = Period > 0 ? Task.Delay(Period, TokenSource.Token) : CompletedTask; |
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107 | Delay.ContinueWith(t => tick(), TokenSource.Token); |
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108 | }; |
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109 | Delay = due > 0 ? Task.Delay(due, TokenSource.Token) : CompletedTask; |
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110 | Delay.ContinueWith(t => tick(), TokenSource.Token); |
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111 | } |
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112 | } |
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113 | |||
114 | private void Cancel() |
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115 | { |
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116 | if (TokenSource != null) |
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117 | { |
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118 | TokenSource.Cancel(); |
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119 | TokenSource.Dispose(); |
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120 | TokenSource = null; |
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121 | } |
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122 | } |
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123 | } |
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124 | |||
125 | /////////////////////////////////////////////////////////////////////////// |
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126 | // Copyright (C) Wizardry and Steamworks 2015 - License: GNU GPLv3 // |
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127 | /////////////////////////////////////////////////////////////////////////// |
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128 | /// <summary> |
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129 | /// Given a number of allowed events per seconds, this class allows you |
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130 | /// to determine via the IsSafe property whether it is safe to trigger |
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131 | /// another lined-up event. This is mostly used to check that throttles |
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132 | /// are being respected. |
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133 | /// </summary> |
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134 | public class TimedThrottle : IDisposable |
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135 | { |
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136 | private readonly uint EventsAllowed; |
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137 | private readonly object LockObject = new object(); |
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138 | private Timer timer; |
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139 | private uint TriggeredEvents; |
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140 | |||
141 | public TimedThrottle(uint events, uint seconds) |
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142 | { |
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143 | EventsAllowed = events; |
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144 | if (timer == null) |
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145 | { |
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146 | timer = new Timer(o => |
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147 | { |
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148 | lock (LockObject) |
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149 | { |
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150 | TriggeredEvents = 0; |
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151 | } |
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152 | }, null, (int) seconds, (int) seconds); |
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153 | } |
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154 | } |
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155 | |||
156 | public bool IsSafe |
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157 | { |
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158 | get |
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159 | { |
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160 | lock (LockObject) |
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161 | { |
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162 | return ++TriggeredEvents <= EventsAllowed; |
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163 | } |
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164 | } |
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165 | } |
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166 | |||
167 | public void Dispose() |
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168 | { |
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169 | Dispose(true); |
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170 | GC.SuppressFinalize(this); |
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171 | } |
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172 | |||
173 | protected virtual void Dispose(bool dispose) |
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174 | { |
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175 | if (timer != null) |
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176 | { |
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177 | timer.Dispose(); |
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178 | timer = null; |
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179 | } |
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180 | } |
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181 | } |
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182 | |||
183 | /////////////////////////////////////////////////////////////////////////// |
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184 | // Copyright (C) Wizardry and Steamworks 2013 - License: GNU GPLv3 // |
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185 | /////////////////////////////////////////////////////////////////////////// |
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186 | /// <summary> |
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187 | /// An alarm class similar to the UNIX alarm with the added benefit |
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188 | /// of a decaying timer that tracks the time between rescheduling. |
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189 | /// </summary> |
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190 | /// <remarks> |
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191 | /// (C) Wizardry and Steamworks 2013 - License: GNU GPLv3 |
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192 | /// </remarks> |
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193 | public class DecayingAlarm : IDisposable |
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194 | { |
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195 | [Flags] |
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196 | public enum DECAY_TYPE |
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197 | { |
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198 | [XmlEnum(Name = "none")] NONE = 0, |
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199 | [XmlEnum(Name = "arithmetic")] ARITHMETIC = 1, |
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200 | [XmlEnum(Name = "geometric")] GEOMETRIC = 2, |
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201 | [XmlEnum(Name = "harmonic")] HARMONIC = 4, |
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202 | [XmlEnum(Name = "weighted")] WEIGHTED = 5 |
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203 | } |
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204 | |||
205 | private readonly DECAY_TYPE decay = DECAY_TYPE.NONE; |
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206 | private readonly Stopwatch elapsed = new Stopwatch(); |
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207 | private readonly object LockObject = new object(); |
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208 | private readonly HashSet<double> times = new HashSet<double>(); |
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209 | private Timer alarm; |
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210 | |||
211 | /// <summary> |
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212 | /// The default constructor using no decay. |
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213 | /// </summary> |
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214 | public DecayingAlarm() |
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215 | { |
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216 | Signal = new ManualResetEvent(false); |
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217 | } |
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218 | |||
219 | /// <summary> |
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220 | /// The constructor for the DecayingAlarm class taking as parameter a decay type. |
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221 | /// </summary> |
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222 | /// <param name="decay">the type of decay: arithmetic, geometric, harmonic, heronian or quadratic</param> |
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223 | public DecayingAlarm(DECAY_TYPE decay) |
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224 | { |
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225 | Signal = new ManualResetEvent(false); |
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226 | this.decay = decay; |
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227 | } |
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228 | |||
229 | public ManualResetEvent Signal { get; set; } |
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230 | |||
231 | public void Dispose() |
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232 | { |
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233 | Dispose(true); |
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234 | GC.SuppressFinalize(this); |
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235 | } |
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236 | |||
237 | public void Alarm(double deadline) |
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238 | { |
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239 | lock (LockObject) |
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240 | { |
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241 | switch (alarm == null) |
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242 | { |
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243 | case true: |
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244 | elapsed.Start(); |
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245 | alarm = new Timer(o => |
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246 | { |
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247 | lock (LockObject) |
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248 | { |
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249 | Signal.Set(); |
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250 | elapsed.Stop(); |
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251 | times.Clear(); |
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252 | alarm.Dispose(); |
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253 | alarm = null; |
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254 | } |
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255 | }, null, (int) deadline, 0); |
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256 | return; |
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257 | case false: |
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258 | elapsed.Stop(); |
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259 | times.Add(elapsed.ElapsedMilliseconds); |
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260 | switch (decay) |
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261 | { |
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262 | case DECAY_TYPE.ARITHMETIC: |
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263 | alarm?.Change( |
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264 | (int) ((deadline + times.Aggregate((a, b) => b + a))/(1f + times.Count)), 0); |
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265 | break; |
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266 | case DECAY_TYPE.GEOMETRIC: |
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267 | alarm?.Change((int) (Math.Pow(deadline*times.Aggregate((a, b) => b*a), |
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268 | 1f/(1f + times.Count))), 0); |
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269 | break; |
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270 | case DECAY_TYPE.HARMONIC: |
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271 | alarm?.Change((int) ((1f + times.Count)/ |
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272 | (1f/deadline + times.Aggregate((a, b) => 1f/b + 1f/a))), 0); |
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273 | break; |
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274 | case DECAY_TYPE.WEIGHTED: |
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275 | HashSet<double> d = new HashSet<double>(times) {deadline}; |
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276 | double total = d.Aggregate((a, b) => b + a); |
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277 | alarm?.Change( |
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278 | (int) (d.Aggregate((a, b) => Math.Pow(a, 2)/total + Math.Pow(b, 2)/total)), 0); |
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279 | break; |
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280 | default: |
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281 | alarm?.Change((int) deadline, 0); |
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282 | break; |
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283 | } |
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284 | elapsed.Reset(); |
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285 | elapsed.Start(); |
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286 | break; |
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287 | } |
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288 | } |
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289 | } |
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290 | |||
291 | protected virtual void Dispose(bool dispose) |
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292 | { |
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293 | if (alarm != null) |
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294 | { |
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295 | alarm.Dispose(); |
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296 | alarm = null; |
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297 | } |
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298 | } |
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299 | } |
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300 | } |
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301 | } |