private static void ForceAbort(AsyncStreamCopier <T> copier, bool timedOut)
{
ExecutionState <T> state = copier.state;
if (state != null)
{
if (state.Req != null)
{
try
{
state.ReqTimedOut = timedOut;
#if WINDOWS_DESKTOP && !WINDOWS_PHONE
state.Req.Abort();
#endif
}
catch (Exception)
{
// no op
}
}
copier.exceptionRef = timedOut ?
Exceptions.GenerateTimeoutException(state.Cmd != null ? state.Cmd.CurrentResult : null, null) :
Exceptions.GenerateCancellationException(state.Cmd != null ? state.Cmd.CurrentResult : null, null);
}
}
/// <summary>
/// Callback for timeout timer. Aborts the AsyncStreamCopier operation if a timeout occurs.
/// </summary>
/// <param name="copier">AsyncStreamCopier operation.</param>
/// <param name="timedOut">True if the timer has timed out, false otherwise.</param>
private static void MaximumCopyTimeCallback(object copier, bool timedOut)
{
if (timedOut)
{
AsyncStreamCopier <T> asyncCopier = (AsyncStreamCopier <T>)copier;
AsyncStreamCopier <T> .ForceAbort(asyncCopier, true);
}
}
internal static void WriteToAsync <T>(this Stream stream, Stream toStream, long?copyLength, long?maxLength, bool calculateMd5, ExecutionState <T> executionState, StreamDescriptor streamCopyState, Action <ExecutionState <T> > completed)
{
AsyncStreamCopier <T> copier = new AsyncStreamCopier <T>(stream, toStream, executionState, GetBufferSize(stream), calculateMd5, streamCopyState);
copier.StartCopyStream(completed, copyLength, maxLength);
}
/// <summary>
/// Aborts an ongoing copy operation.
/// </summary>
public void Abort()
{
this.cancelRequested = true;
AsyncStreamCopier <T> .ForceAbort(this, false);
}
