Deferred.cs
63 lines
| 1.7 KiB
| text/x-csharp
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CSharpLexer
/ Implab / Deferred.cs
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r244 | using System; | |
| using System.Diagnostics; | |||
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r251 | using System.Threading.Tasks; | |
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r244 | ||
| namespace Implab { | |||
| /// <summary> | |||
| /// This class is responsible for the promise resolution, dispatching and chaining | |||
| /// </summary> | |||
| public class Deferred : IResolvable { | |||
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r248 | readonly Promise m_promise; | |
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r249 | internal Deferred() { | |
| m_promise = new Promise(); | |||
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r248 | } | |
| internal Deferred(Promise promise, IDispatcher dispatcher) { | |||
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r244 | Debug.Assert(promise != null); | |
| m_promise = promise; | |||
| } | |||
| public IPromise Promise { | |||
| get { return m_promise; } | |||
| } | |||
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r249 | public void Cancel() { | |
| Reject(new OperationCanceledException()); | |||
| } | |||
| public virtual void Reject(Exception error) { | |||
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r248 | if (error is PromiseTransientException) | |
| error = ((PromiseTransientException)error).InnerException; | |||
| m_promise.RejectPromise(error); | |||
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r244 | } | |
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r249 | public virtual void Resolve() { | |
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r248 | m_promise.ResolvePromise(); | |
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r244 | } | |
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r249 | public virtual void Resolve(IPromise thenable) { | |
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r244 | if (thenable == null) | |
| Reject(new Exception("The promise or task are expected")); | |||
| if (thenable == m_promise) | |||
| Reject(new Exception("The promise cannot be resolved with oneself")); | |||
| try { | |||
| thenable.Then(this); | |||
| } catch (Exception err) { | |||
| Reject(err); | |||
| } | |||
| } | |||
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r249 | ||
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r251 | public virtual void Resolve(Task thenable) { | |
| if (thenable == null) | |||
| Reject(new Exception("The promise or task are expected")); | |||
| try { | |||
| thenable.Then(this); | |||
| } catch(Exception err) { | |||
| Reject(err); | |||
| } | |||
| } | |||
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r244 | } | |
| } |