Re: [libvirt] [PATCH] libvirt, logging: cleanup VIR_DEBUG0() VIR_INFO0() VIR_WARN0() VIR_ERROR0()
On 05/09/2011 03:24 AM, Lai Jiangshan wrote:
These VIR_XXXX0 APIs make us confused, use the non-0-suffix APIs
instead.
How these coversions works? The magic is using ##.
#define high_levle_api(fmt, ...) low_levle_api(fmt, ##__VA_ARGS__)
When __VA_ARGS__ is empty, "##" will swallow the "," in
"fmt," to avoid compile error.
##__VA_ARGS__ is a GNU extension; it does not work on all C99 compilers.
I'm worried that this is not portable.
--
Eric Blake eblake(a)redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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