lkml.org 
[lkml]   [2007]   [Oct]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 01/32] Add an ERR_CAST() macro to complement ERR_PTR and co. [try #2]
On Thu, 04 Oct 2007 16:56:07 +0100 David Howells wrote:

> Add an ERR_CAST() macro to complement ERR_PTR and co. for the purposes of
> casting an error entyped as one pointer type to an error of another pointer
> type whilst making it explicit as to what is going on.
>
> This provides a replacement for the ERR_PTR(PTR_ERR(p)) construct.
>
> Signed-off-by: David Howells <dhowells@redhat.com>
> ---
>
> include/linux/err.h | 12 ++++++++++++
> 1 files changed, 12 insertions(+), 0 deletions(-)
>
> diff --git a/include/linux/err.h b/include/linux/err.h
> index 1ab1d44..e810ca4 100644
> --- a/include/linux/err.h
> +++ b/include/linux/err.h
> @@ -34,6 +34,18 @@ static inline long IS_ERR(const void *ptr)
> return IS_ERR_VALUE((unsigned long)ptr);
> }
>
> +/**
> + * ERR_CAST - Explicitly cast an error-valued pointer to another pointer type
> + * ptr: The pointer to cast.

@ptr:

> + *
> + * Explicitly cast an error-valued pointer to another pointer type in such a
> + * way as to make it clear that's what's going on.
> + */
> +static inline void *ERR_CAST(const void *ptr)
> +{
> + return (void *) ptr;
> +}
> +
> #endif
>
> #endif /* _LINUX_ERR_H */


---
~Randy
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-10-05 18:25    [W:0.225 / U:0.156 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site