linux-kernel - Re: epoll_ctl and const correctness

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Message-ID: <84a01a8b0903271243p60cee9fbn725cfe1118e9642d@mail.gmail.com>
Date:	Fri, 27 Mar 2009 20:43:17 +0100
From:	nicolas sitbon <nicolas.sitbon@...il.com>
To:	Davide Libenzi <davidel@...ilserver.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: epoll_ctl and const correctness

According to this link : http://lse.sourceforge.net/epoll/index.html,
you're are the author of epoll, so please can you answer my questions.
TBA.

2009/3/25 Davide Libenzi <davidel@...ilserver.org>:
> On Wed, 25 Mar 2009, nicolas sitbon wrote:
>
>> Currently, the prototype of epoll_ctl is :
>>
>> int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event);
>>
>> I searched in the man of epoll_ctl and google, and it seems that the
>> structure pointed to by event isn't modify, valgrind confirms this
>> behaviour, so am I wrong? or the good prototype is
>>
>> int epoll_ctl(int epfd, int op, int fd, struct epoll_event const *event);
>
> According to the current ctl operations, yes. But doing that would prevent
> other non-const operations to be added later on.
>
>
> - Davide
>
>
>
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