WIP: GPollableOutputstream: Extend the API to avoid allocating GErrors for WOULD_BLOCK
GPollalbeOutputStream->writev_nonblocking always allocates a
_WOULD_BLOCK results. This is not much efficient and can be quite expensive in networking scenarios. This MR extends the
GPollalbeOutputStream interface with an optional method that behaves identical to
write_nonblockin but returns a
GError is only allocated if the result is
_FAILURE variant of
Additionally all the existing implementors of
gio are extended to make use of the new API, to do that
gsocket was needed to become public.
Since the default implementation of
g_pollable_output_stream_write_nonblocking was switched to use
_pollable if available, that means it also stole the test coverage from
GPollalbeOutputStream->writev_nonblocking which was only tested indirectly. I am not sure how to introduce new tests for this since I don't think it was tested direclty. Extra help there would be much appreciated ^^.
g_pollable_output_stream_write_nonblocking_pollable is a terrible name, but I couldn't come up with anything better. Feel free to bikeshed it :)
Also, note d8dc9d34, this MR is intended for 2.62+ but needed to get the CI to pass.