Re: [Qemu-devel] WIP coroutine support in GLib

[Peter Maydell]

On 26 November 2013 15:12, Paolo Bonzini <address@hidden> wrote:
> Il 26/11/2013 16:06, Marc-André Lureau ha scritto:
>> At least 3 glib projects share a similar coroutine implementation
>> (gtk-vnc, spice-gtk and qemu). So I decided to propose adding
>> coroutine support in GLib. I made some changes regarding the API to be
>> slightly more generic. I invite you to review and participate to the
>> RFC bug https://bugzilla.gnome.org/show_bug.cgi?id=719362.
>>
>> If the proposal isn't refused, I'll keep working on it as it's
>> incomplete at this point and will provide a qemu patch as a proof of
>> concept.
>
> Note that makecontext does not work on at least ARM (and I think some
> BSDs too),

We did get makecontext() fixed in ARM glibc, so unless you're still
using an ancient glibc you're probably OK. The general point
remains though -- coroutines in C are nastily non-portable,
which is why qemu has four different implementations of the
basic primitives.

Personally I think the correct answer is to accept that C is
not a language with coroutines (or to push for them to be
added to the next version of the C standard).

-- PMM