Re: [Xen-devel] [PATCH v4 23/27] libxl: ocaml: add VM lifecycle operations

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2013-11-06 at 17:50 +0000, Rob Hoes wrote:
> +     if (async != Val_none) {
> +             ao_how->callback = async_callback;
> +             ao_how->u.for_callback = (void *) Some_val(async);
> +             CAMLreturnT(libxl_asyncop_how *, ao_how);
> +     }
> +     else
> +             CAMLreturnT(libxl_asyncop_how *, NULL);

This doesn't appear to be in my caml headers on Debian Wheezy
(3.12.1-4). A random hit on google
http://docs.camlcity.org/docs/godisrc/oasis-ocaml-fd-1.1.1.tar.gz/ocaml-fd-1.1.1/lib/fd_stubs.c
 suggests this was new in 3.09.4 so why don't I have it?

We would really like to keep this stuff working with some of the more
common distro's stable versions of ocaml, so if this is really missing
then perhaps a compat version would be needed?

WTF is it doing anyway? Something to do with this C struct pointer
containing a Value?

Ian.


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