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143
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1 using System;
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2
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3 namespace Implab {
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4 public interface ICancelationToken {
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5 /// <summary>
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6 /// Indicates wherther the cancellation was requested.
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7 /// </summary>
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8 bool IsCancelRequested { get ; }
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9
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10 /// <summary>
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11 /// The reason why the operation should be cancelled.
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12 /// </summary>
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13 Exception CancelReason { get ; }
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14
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15 /// <summary>
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16 /// Accepts if requested.
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17 /// </summary>
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18 /// <returns><c>true</c>, if if requested was accepted, <c>false</c> otherwise.</returns>
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19 bool AcceptIfRequested();
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20
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21 /// <summary>
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22 /// Sets the token to cancelled state.
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23 /// </summary>
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24 /// <param name="reason">The reason why the operation was cancelled.</param>
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25 void SetCancelled(Exception reason);
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26
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27 /// <summary>
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28 /// Adds the listener for the cancellation request, is the cancellation was requested the <paramref name="handler"/>
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29 /// is executed immediatelly.
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30 /// </summary>
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31 /// <param name="handler">The handler which will be executed if the cancel occurs.</param>
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32 void CancellationRequested(Action<Exception> handler);
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33
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34 }
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35 }
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36
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