Re: [Qemu-block] [Qemu-devel] Block layer complexity: what to do to keep it under control?

[Eric Blake]

On 12/01/2017 11:03 AM, Paolo Bonzini wrote:
> Just my 2 cents on the language topic, as in general I agree completely
> with Stefan.

> Luckily, several benefits don't require a full rewrite or language switch:
>
> - readability from RAII-style code.  If this is important enough, we
> could actually use GCC __attribute__((cleanup)) or, heaven forbid,
> slowly introduce C++ in QEMU's code base.

This one is cool, and supported by both gcc and clang (and we really 
don't have any example of anyone clamoring for a different compiler). 
For example, here's what I recently added to nbdkit to make it MUCH 
easier to properly remember to unlock a mutex on all exit paths from a 
scope:

https://github.com/libguestfs/nbdkit/commit/0f24d66648
https://github.com/libguestfs/nbdkit/commit/b5ab4835e1

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org