From: Markus Armbruster <armbru@redhat.com>
To: Eric Blake <eblake@redhat.com>
Cc: "Marc-André Lureau" <marcandre.lureau@redhat.com>,
qemu-devel@nongnu.org, pbonzini@redhat.com
Subject: Re: [Qemu-devel] [PATCH v6 4/5] qobject: modify qobject_ref() to return obj
Date: Fri, 27 Apr 2018 13:42:37 +0200 [thread overview]
Message-ID: <87po2kq3iq.fsf@dusky.pond.sub.org> (raw)
In-Reply-To: <9254b6df-8840-183c-8854-0dfd892f11ad@redhat.com> (Eric Blake's message of "Thu, 19 Apr 2018 10:32:41 -0500")
Eric Blake <eblake@redhat.com> writes:
> On 04/19/2018 10:01 AM, Marc-André Lureau wrote:
>> For convenience and clarity, make it possible to call qobject_ref() at
>> the time when the reference is associated with a variable, or
>> argument, by making qobject_ref() return the same pointer as given.
>>
>> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
>> Reviewed-by: Eric Blake <eblake@redhat.com>
>
> You've made some substantial changes to the macro, I would have dropped
> R-b to ensure those changes get reviewed. In particular,
>
>> ---
>
>> +++ b/include/qapi/qmp/qobject.h
>> @@ -72,11 +72,12 @@ static inline void qobject_init(QObject *obj, QType type)
>> obj->base.type = type;
>> }
>>
>> -static inline void qobject_ref_impl(QObject *obj)
>> +static inline void *qobject_ref_impl(QObject *obj)
>> {
>> if (obj) {
>> obj->base.refcnt++;
>> }
>> + return obj;
>
> This hunk is now useless,
>
>> @@ -103,8 +104,15 @@ static inline void qobject_unref_impl(QObject *obj)
>>
>> /**
>> * qobject_ref(): Increment QObject's reference count
>> + *
>> + * Returns: the same @obj. The type of @obj will be propagated to the
>> + * return type.
>> */
>> -#define qobject_ref(obj) qobject_ref_impl(QOBJECT(obj))
>> +#define qobject_ref(obj) ({ \
>> + typeof(obj) _o = (obj); \
>> + qobject_ref_impl(QOBJECT(_o)); \
>> + _o; \
>
> since nothing ever uses the return value.
>
> But that said, I'm still okay with R-b with or without the useless hunk.
I intend to drop it on commit.
next prev parent reply other threads:[~2018-04-27 11:42 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-19 15:01 [Qemu-devel] [PATCH v6 0/5] Simplify qobject refcount Marc-André Lureau
2018-04-19 15:01 ` [Qemu-devel] [PATCH v6 1/5] qobject: ensure base is at offset 0 Marc-André Lureau
2018-04-19 15:20 ` Eric Blake
2018-04-19 15:23 ` Marc-André Lureau
2018-04-24 12:18 ` Markus Armbruster
2018-04-24 12:34 ` Peter Maydell
2018-04-24 15:24 ` Markus Armbruster
2018-04-26 14:50 ` Markus Armbruster
2018-04-27 8:14 ` Markus Armbruster
2018-04-19 15:01 ` [Qemu-devel] [PATCH v6 2/5] qobject: use a QObjectBase_ struct Marc-André Lureau
2018-04-27 8:24 ` Markus Armbruster
2018-04-27 15:29 ` Eric Blake
2018-04-19 15:01 ` [Qemu-devel] [PATCH v6 3/5] qobject: replace qobject_incref/QINCREF qobject_decref/QDECREF Marc-André Lureau
2018-04-19 15:27 ` Eric Blake
2018-04-27 8:59 ` Markus Armbruster
2018-04-19 15:01 ` [Qemu-devel] [PATCH v6 4/5] qobject: modify qobject_ref() to return obj Marc-André Lureau
2018-04-19 15:32 ` Eric Blake
2018-04-27 11:42 ` Markus Armbruster [this message]
2018-05-02 13:28 ` Eric Blake
2018-05-02 14:14 ` Markus Armbruster
2018-04-27 8:50 ` Markus Armbruster
2018-04-19 15:01 ` [Qemu-devel] [PATCH v6 5/5] qobject: modify qobject_ref() to assert on NULL Marc-André Lureau
2018-04-19 15:39 ` Eric Blake
2018-04-19 16:04 ` Marc-André Lureau
2018-04-19 15:45 ` [Qemu-devel] [PATCH v6 0/5] Simplify qobject refcount Eric Blake
2018-04-19 16:02 ` Marc-André Lureau
2018-05-02 8:31 ` Markus Armbruster
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