From: "H. Peter Anvin" <hpa@zytor.com>
To: Jeff King <peff@peff.net>
Cc: git@vger.kernel.org
Subject: Re: [PATCH] Trivial warning fix for imap-send.c
Date: Sun, 12 Mar 2006 22:41:35 -0800 [thread overview]
Message-ID: <4415141F.2080604@zytor.com> (raw)
In-Reply-To: <20060313033805.GB14601@coredump.intra.peff.net>
Jeff King wrote:
>
> I think Linus has cut to the heart of the discussion (that it's worth
> git maintainers' sanity not to worry about such problems). However, for
> pedantry's sake, this is how malloc works:
>
> A void pointer is guaranteed to be able to hold any type of pointer
> (either char * or struct foo * or whatever). The declaration of malloc
> indicates a return of void *. On a platform where it matters, the
> compiler generates code so that
> struct foo *bar = malloc(100);
> converts the void * pointer into the correct size (in the same way that
> assigning between differently sized integers works).
>
Furthermore, the return value of malloc() (calloc, realloc, ...) is
guaranteed to be a value suitable for casting to any pointer type for
which at least one object can fit in the allocated memory block.
-hpa
next prev parent reply other threads:[~2006-03-13 6:41 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-11 19:29 [PATCH] Trivial warning fix for imap-send.c Art Haas
2006-03-12 10:44 ` Mark Wooding
2006-03-12 11:27 ` Junio C Hamano
2006-03-12 13:59 ` [PATCH] Use explicit pointers for execl...() sentinels Mark Wooding
2006-03-12 15:13 ` Timo Hirvonen
2006-03-12 17:32 ` Mark Wooding
2006-03-12 18:08 ` Timo Hirvonen
2006-03-13 3:31 ` Jeff King
2006-03-13 4:12 ` Horst von Brand
2006-03-14 0:42 ` [OT] " Jeff King
2006-03-12 16:57 ` [PATCH] Trivial warning fix for imap-send.c Linus Torvalds
2006-03-12 18:01 ` Mark Wooding
2006-03-12 19:20 ` A Large Angry SCM
2006-03-13 2:59 ` H. Peter Anvin
2006-03-13 4:36 ` A Large Angry SCM
2006-03-13 5:22 ` Linus Torvalds
2006-03-13 6:37 ` H. Peter Anvin
2006-03-13 6:46 ` Linus Torvalds
2006-03-13 16:37 ` Olivier Galibert
2006-03-13 3:38 ` Jeff King
2006-03-13 4:14 ` Horst von Brand
2006-03-13 16:26 ` Linus Torvalds
2006-03-13 6:41 ` H. Peter Anvin [this message]
2006-03-12 21:51 ` Horst von Brand
2006-03-12 23:02 ` Linus Torvalds
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