annotate Implab/Deferred`1.cs @ 270:ade80d94dfb5 v3

Working on Unity container xml configuration
author cin
date Wed, 25 Apr 2018 04:44:40 +0300
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1 using System;
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2 using System.Diagnostics;
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3 using System.Threading.Tasks;
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4
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5 namespace Implab {
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6 public class Deferred<T> : IResolvable<T> {
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7 readonly Promise<T> m_promise;
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8
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9 internal Deferred() {
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10 m_promise = new Promise<T>();
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11 }
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13 protected Deferred(Promise<T> promise) {
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14 Debug.Assert(promise != null);
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15 m_promise = promise;
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16 }
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18 public IPromise<T> Promise {
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19 get { return m_promise; }
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20 }
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21
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22 public void Cancel() {
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23 Reject(new OperationCanceledException());
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24 }
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26 public virtual void Reject(Exception error) {
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27 if (error is PromiseTransientException)
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28 error = ((PromiseTransientException)error).InnerException;
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30 m_promise.RejectPromise(error);
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31 }
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33 public virtual void Resolve(T value) {
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34 m_promise.ResolvePromise(value);
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35 }
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37 public virtual void Resolve(IPromise<T> thenable) {
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38 if (thenable == null)
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39 Reject(new Exception("The promise or task are expected"));
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40 if (thenable == m_promise)
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41 Reject(new Exception("The promise cannot be resolved with oneself"));
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42
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43 try {
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44 thenable.Then(this);
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45 } catch (Exception err) {
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46 Reject(err);
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47 }
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48 }
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50 public virtual void Resolve(Task<T> thenable) {
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51 if (thenable == null)
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52 Reject(new Exception("The promise or task are expected"));
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54 try {
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55 thenable.Then(this);
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56 } catch (Exception err) {
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57 Reject(err);
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58 }
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59 }
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60 }
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61 }