winrt: Get rid of one deferral when handling socket data

Instead of defering one more time by emitting the signal, we can add
the data to the list of available data/pending datagrams. For TCP
readNotification can be invoked directly so that emission of the
readyRead signal is tightly coupled to the availability of new data.
For UDP sockets calling readNotification directly stops handling of
more data and thus cannot be done.

With the old approach it was possible, that the last bit of TCP data
was lost, because the socket was closed while the data was still being
processed/transferred from the worker to the engine.

Task-number: QTBUG-61078
Change-Id: I9330b87876be853d310dc9e8e817ab344939d5dd
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>

0 files changed, 0 insertions, 0 deletions