[Libguestfs] [PATCH libnbd] generator: Add SizeT type, maps to C size_t.

Eric Blake eblake at redhat.com
Thu Oct 1 01:40:52 UTC 2020


On 9/29/20 6:46 AM, Richard W.M. Jones wrote:
> ---
>  generator/API.ml    |  1 +
>  generator/API.mli   |  1 +
>  generator/C.ml      | 14 ++++++++++----
>  generator/GoLang.ml |  5 +++++
>  generator/OCaml.ml  |  5 +++++
>  generator/Python.ml | 11 +++++++++--
>  6 files changed, 31 insertions(+), 6 deletions(-)

Looks good, and I'll push a counterpart patch adding RSizeT for
returning ssize_t values.

Question: Should nbd_opt_list() return RSizeT instead of RInt, as it is
returning a count of times the callback was called? The same question
would apply to my upcoming nbd_opt_list_meta_context().  Changing a
return type from 'int' to 'ssize_t' can result in an ABI change (32- vs.
64-bit return on some platforms), which may be too risky, even though
1.4 is still fairly new that we are unlikely to break anyone in practice.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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