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Date: Fri, 02 Dec 2011 13:35:46 +0100
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 14/18] rtc: add a dynamic property
 for	retrieving the date
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Kevin Wolf <kwolf@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>, Jan Kiszka <jan.kiszka@siemens.com>, qemu-devel@nongnu.org, Markus Armbruster <armbru@redhat.com>, Luiz Capitulino <lcapitulino@redhat.com>

  Hi,

> https://github.com/aliguori/qidl/
> 
> In your example:
> 
> struct SomeDev {
>        DeviceState _immutable dev;
>        Chardev _immutable     *chr;
>        uint32_t               reg1;
>        uint32_t               reg2;
>        [ ... ]
> };
> 
>>
>> ... instead of the vmstate structs we create manually today.  Likewise
>> for properties.  And probably we can even generate different visitors
>> for different "views" at the same struct.
> 
> qc generates a json description of the struct.  You can then use a
> generate to take that json and generate code for VMState, QAPI, etc.
> 
> The readme has quite a lot of detail about the syntax.  The parser is
> pretty complete already.
> 
> https://github.com/aliguori/qidl/blob/master/qc.md

Ah, nice.  Any plans to support lists there, so it is possible to save
the state of (multiple) in-flight transactions?

> But I want to get us moving on QOM first before I go any further with
> this.  We can always go back and remove the manually written visit
> functions.

Sure, one step at a time.  It helps when reviewing to have a rough idea
of the big pixture though ...

cheers,
  Gerd