NT Status vs. Dos Error code in async operations

[Martin Wilck]

Hi,

If my understanding of the MS docs is correct, the status
of overlapped requests is stored as an NT status in
lpOverlapped->Internal (As Mike implemented it). The error code returned
by GetOverlappedResult() or passed to the completion routine, though,
is a DOS error code. Thus in priciple we'd need to convert the status
with RtlNtStatusToDosError(), right ?

Moreover, if our async read()/write() operations fail, we simply set
the status to STATUS_UNSUCCESSFUL which translates to ERROR_GEN_FAILURE -
not very meaningful to our users.

What we'd need would consequently be a errno->NT status converter to
set the overlapped status correctly from the error reported by read or
write.

I can't seem to find one in the wine code (??). There only seem to be
local errno -> DOS error converters, and no DOS error->Nt status
converter.

What should we do?

Martin

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