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Re: [Qemu-devel] Common header file for error codes
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] Common header file for error codes |
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Date: |
Wed, 21 May 2014 08:19:00 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 |
On 05/21/2014 07:24 AM, Anshul Makkar wrote:
> Hi,
>
> Doesn't there exist a common header file for all the return codes. In the
> code I can see return values as 0, -1 etc.
Most functions that flag failure via the return value do so by returning
merely 0 or -1. There's a few that return 0 or -errno. More often,
instead of encoding error categories into a return value, we instead
prefer to use the QAPI error type 'struct Error' (see
include/qapi/error.h), which has categories for the few places where it
is needed, along with utility functions for setting error messages.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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