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r187:dd4a3590f9c6 ref20160224
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FuncChainTaskBase.cs
54 lines | 1.8 KiB | text/x-csharp | CSharpLexer
/ Implab / FuncChainTaskBase.cs
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RC: cancellation support for promises + tests
r145 using System;
namespace Implab {
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Reworked cancelation handling, if the cancel handler isn't specified the OperationCanceledException will be handled by the error handler...
r187 public class FuncChainTaskBase<TResult> : AbstractTask<TResult> {
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r145 readonly Func<Exception, IPromise<TResult>> m_error;
readonly Func<Exception, IPromise<TResult>> m_cancel;
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fixed promises cancellation
r149 protected FuncChainTaskBase( Func<Exception, IPromise<TResult>> error, Func<Exception, IPromise<TResult>> cancel, bool autoCancellable) {
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r145 m_error = error;
m_cancel = cancel;
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fixed promises cancellation
r149 if (autoCancellable)
CancellationRequested(CancelOperation);
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r145 }
public void Reject(Exception error) {
if (LockCancelation())
HandleErrorInternal(error);
}
public override void CancelOperation(Exception reason) {
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r187 if (LockCancelation())
HandleCancelInternal(reason);
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r145 }
protected void HandleErrorInternal(Exception error) {
if (m_error != null) {
try {
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Reworked cancelation handling, if the cancel handler isn't specified the OperationCanceledException will be handled by the error handler...
r187 var p = m_error(error);
p.On(SetResult, SetErrorInternal, SetCancelledInternal);
CancellationRequested(p.Cancel);
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r145 } catch(Exception err) {
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r187 SetErrorInternal(err);
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r145 }
} else {
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r187 SetErrorInternal(error);
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r145 }
}
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Reworked cancelation handling, if the cancel handler isn't specified the OperationCanceledException will be handled by the error handler...
r187 protected void HandleCancelInternal(Exception reason) {
if (m_cancel != null) {
try {
var p = m_cancel(reason);
p.On(SetResult, HandleErrorInternal, SetCancelledInternal);
CancellationRequested(p.Cancel);
} catch (Exception err) {
HandleErrorInternal(err);
}
} else {
HandleErrorInternal(reason ?? new OperationCanceledException());
}
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r145 }
}
}