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From: | Avi Kivity |
Subject: | [Qemu-devel] Re: [PATCH 02/29] Introduce QInt |
Date: | Thu, 13 Aug 2009 16:55:50 +0300 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2 |
On 08/13/2009 04:50 PM, Luiz Capitulino wrote:
+ +/** + * qobject_to_qint(): Convert a QObject into a QInt + */ +static inline QInt *qobject_to_qint(const QObject *obj) +{ + return container_of(obj, QInt, base); +} +
It's worthwhile to check the type here and return NULL if not an integer. That allows users to
QInt *qi = qobject_to_qint(...); if (qi) { do something } else { error handling } (this is equivalent to C++'s static_cast vs. dynamic_cast) -- error compiling committee.c: too many arguments to function
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