public async Task <IDescriptionPackage> LoadAsync(IContext ctx = default)
{
var ctxCt = ctx.Ct();
ctxCt.ThrowExceptionIfCancellationRequested();
var disposeCts = ReadDA(location: ref _disposeCts);
var disposeCt = disposeCts.Token;
var loader = ReadDA(location: ref _loader, considerDisposeRequest: true);
var linkedCts = default(CancellationTokenSource);
try {
var linkedCt = CancellationTokenUtilities.SingleOrLinked(ct1: ctxCt, ct2: disposeCt, linkedCts: out linkedCts);
using (var locCtx = ContextUtilities.Create(outerCtx: ctx, ct: linkedCt))
return(await loader.ExecuteAsync(ctx : locCtx).ConfigureAwait(false));
}
finally {
linkedCts?.Dispose();
}
}
public async Task <REvaluationResult> EvaluateAsync(string expression, REvaluationKind kind, CancellationToken cancellationToken)
{
if (_runTask == null)
{
throw new InvalidOperationException("Host was not started");
}
using (CancellationTokenUtilities.Link(ref cancellationToken, _cts.Token)) {
try {
await TaskUtilities.SwitchToBackgroundThread();
var request = await EvaluationRequest.SendAsync(this, expression, kind, cancellationToken);
return(await request.Task);
} catch (OperationCanceledException ex) when(_cts.IsCancellationRequested)
{
throw new RHostDisconnectedException(Resources.Error_RHostIsStopped, ex);
}
}
}
public async Task <long> SetBlobSizeAsync(ulong blobId, long size, CancellationToken cancellationToken = default(CancellationToken))
{
if (_runTask == null)
{
throw new InvalidOperationException("Host was not started");
}
using (CancellationTokenUtilities.Link(ref cancellationToken, _cts.Token)) {
try {
await TaskUtilities.SwitchToBackgroundThread();
var request = await BlobSizeRequest.GetSizeAsync(this, blobId, cancellationToken);
return(await request.Task);
} catch (OperationCanceledException ex) when(_cts.IsCancellationRequested)
{
throw new RHostDisconnectedException(Resources.Error_RHostIsStopped, ex);
}
}
}
