##// END OF EJS Templates
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Added IObservable to TraceRegistry
Added IObservable to TraceRegistry
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Deferred`1.cs
60 lines | 1.7 KiB | text/x-csharp | CSharpLexer
/ Implab / Deferred`1.cs
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using System;
using System.Diagnostics;
using System.Threading.Tasks;
namespace Implab {
public class Deferred<T> : IResolvable<T> {
readonly Promise<T> m_promise;
internal Deferred() {
m_promise = new Promise<T>();
}
protected Deferred(Promise<T> promise) {
Debug.Assert(promise != null);
m_promise = promise;
}
public IPromise<T> Promise {
get { return m_promise; }
}
public void Cancel() {
Reject(new OperationCanceledException());
}
public virtual void Reject(Exception error) {
if (error is PromiseTransientException)
error = ((PromiseTransientException)error).InnerException;
m_promise.RejectPromise(error);
}
public virtual void Resolve(T value) {
m_promise.ResolvePromise(value);
}
public virtual void Resolve(IPromise<T> thenable) {
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);
}
}
public virtual void Resolve(Task<T> thenable) {
if (thenable == null)
Reject(new Exception("The promise or task are expected"));
try {
thenable.Then(this);
} catch (Exception err) {
Reject(err);
}
}
}
}