[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: kern/48560: kevent.udata and void *
The following reply was made to PR kern/48560; it has been noted by GNATS.
From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, kern-bug-people%netbsd.org@localhost,
Subject: Re: kern/48560: kevent.udata and void *
Date: Wed, 29 Jan 2014 11:41:17 -0500
On Jan 29, 1:45pm, reed%reedmedia.net@localhost
-- Subject: kern/48560: kevent.udata and void *
| For src/sys/sys/event.h
| I am told that kevent.udata should maybe be void * since C++ doesn't
| allow the naive conversion from a pointer type to integer. Apparently
| some other systems have that has void *
| error: invalid conversion from 'char*' to '__intptr_t'
| I am not sure what prompted the change.
| for an example of __NetBSD__ workaround.
I believe this was done deliberately so that the "opaque user
identifier" was not just a pointer but an integer type (to indicate
that this does not necessary hold a pointer but it *can* hold one).
Nevertheless the reinterpret_cast<type *>(e->udata) takes care of
the issue. In C++ need a static_cast anyway since "void *" is not
fungible with other pointers (unless of course you are assigning to
Main Index |
Thread Index |