From: tlaronde@polynum.com
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] ken-cc, 64 bits machine, and 32 bits integers
Date: Wed, 31 Mar 2010 00:29:43 +0200 [thread overview]
Message-ID: <20100330222943.GA1047@polynum.com> (raw)
In-Reply-To: <4c1be092bc2b1a1fe5008f584c75e3cf@terzarima.net>
On Tue, Mar 30, 2010 at 09:11:07PM +0100, Charles Forsyth wrote:
> on 64-bit machines, int and long are 32 bits,
> long long (vlong) is 64 bits, just as on 32-bit machines,
> but pointers are 64 bits. <u.h> defines uintptr
> as the integer type that will hold a pointer.
> u8int, u16int, u32int and u64int are used in device drivers
> and elsewhere to declare values (eg, in memory-mapped
> structures or protocol buffers) that must be a precise length.
Thanks. As suggested by many, I will read u.h.
Since I wanted to keep the code pure C89, going with "long" will do
without trying to be smarter. Second option, goes POSIX/APE and use
uint32_t/u32int incarnations. I think I will go the former.
--
Thierry Laronde (Alceste) <tlaronde +AT+ polynum +dot+ com>
http://www.kergis.com/
Key fingerprint = 0FF7 E906 FBAF FE95 FD89 250D 52B1 AE95 6006 F40C
next prev parent reply other threads:[~2010-03-30 22:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-30 19:37 tlaronde
2010-03-30 19:52 ` erik quanstrom
2010-03-30 19:56 ` EBo
2010-03-30 20:03 ` Devon H. O'Dell
2010-03-30 20:11 ` Charles Forsyth
2010-03-30 22:29 ` tlaronde [this message]
2010-03-30 20:54 ` Patrick Kelly
2010-03-30 22:34 ` tlaronde
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