[Libguestfs] [PATCH 0/6] Implement OClosure.

[Richard W.M. Jones]

Patches 1-4 are basically uncontroversial, straightforward refactoring
and IMHO we should just push them.  Possibly 1-3 should be squashed
together, but I posted them separately so they are easier to review.

Patches 5 and 6 together implement OClosure.  Patch 5 adds the feature
and is simple to understand.

Patch 6 changes the Closure completion callbacks into OClosure, but
because it doesn't change the position within the list of arguments
the C API doesn't change at all.  The Python API also doesn't change
for the same reason.  (The OCaml API _does_ change but not
significantly).

I've run out of time on this patch today because I've got meetings for
the rest of the day (and it's only 11am!)  However if I did have more
time there would be a 7th patch in the series which renames all
aio_*_callback functions to simply aio_*.  eg. nbd_aio_pread_callback
is renamed to nbd_aio_pread (and old nbd_aio_pread is removed).  That
is obviously a somewhat large albeit it mechanical API change.

Rich.