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[Qemu-devel] Re: [PATCH 2/7] monitor: Handle new and old style handlers
From: |
Luiz Capitulino |
Subject: |
[Qemu-devel] Re: [PATCH 2/7] monitor: Handle new and old style handlers |
Date: |
Thu, 17 Sep 2009 10:18:31 -0300 |
On Thu, 17 Sep 2009 08:39:25 +0200
Paolo Bonzini <address@hidden> wrote:
> On 09/16/2009 11:32 PM, Luiz Capitulino wrote:
> > + return (cmd->user_print == NULL ? 0 : 1);
>
> cmd->user_print != NULL.
Right.
> I would actually inline it at the use point. Also, calling a function
> with an extra argument is fine, so while keeping the void* handler you
> can do:
>
> + QObject *data = NULL;
> + int (*handler_new)(Monitor *mon,
> + const QDict *params, QObject **ret_data);
>
> + handler_new = cmd->handler;
> + handler_new(mon, qdict, &data);
>
> + if (cmd->user_print)
> + cmd->user_print(mon, data);
> + if (data)
> + qobject_decref(data);
>
> If you do not like calling the function with the "wrong" number of
> arguments, you can mass-convert the functions to the new prototype new
> and leave anyway user_print == NULL.
The problem is that the monitor_handler_ported() branch can
have additional code in the future (eg. protocol emission code),
so different branches makes things easier to understand.
> What are the plans for the return code of handler_new?
The protocol emission code will use it to emit 'error' or
'success' messages.
[Qemu-devel] [PATCH 3/7] monitor: do_info(): handle new and old info handlers, Luiz Capitulino, 2009/09/16
[Qemu-devel] [PATCH 4/7] monitor: Convert do_quit() do QObject, Luiz Capitulino, 2009/09/16
[Qemu-devel] [PATCH 5/7] monitor: Convert do_stop() to QObject, Luiz Capitulino, 2009/09/16
[Qemu-devel] [PATCH 6/7] monitor: Convert do_system_reset() to QObject, Luiz Capitulino, 2009/09/16
[Qemu-devel] [PATCH 7/7] monitor: Convert do_system_powerdown() to QObject, Luiz Capitulino, 2009/09/16