Re: determine CPU type at runtime
Re: determine CPU type at runtime
- Subject: Re: determine CPU type at runtime
- From: "Daniel Lord" <email@hidden>
- Date: Tue, 26 Feb 2008 12:16:05 -0800
Rick,
No need. Pilot error. I performed the call multiple times but foolishly forgot that the thrid parameter, size_t *oldlenp, was volatile. Oops!
sysctlbyname(const char *name, void *oldp, size_t *oldlenp, void *newp, size_t newlen);
I _hate_ when that happens. Note to self: CRTFM (as in CAREFULLY read the freaking manual).
Daniel
On 2/26/08, Rick Altherr <email@hidden> wrote:
Care to post your code? I'm fairly certain the sysctl command-line tool uses sysctlbyname() internally and it works fine with hw.model.
Rick
On Feb 26, 2008, at 11:35 AM, Daniel Lord wrote:
Paul,
use sysctl() not sysctlbyname() as syscntrlbyname() seems to be broken as in the results I get on Leopard 10.5.2:
sysctl:
-------------------------------------------
CTL_HW, HW_MACHINE: i386
CTL_HW, HW_MODEL: MacBookPro2,2
sysctlbyname:
-------------------------------------------
hw.machine:i386
hw.model:i386
Chris,
Is is worth filing a bug report or is this well-known?
Daniel
On 2/25/08, Chris Espinosa <email@hidden> wrote:
On Feb 25, 2008, at 1:48 PM, Paul Archibald wrote:
> One of the apps I am working on has minor issues when running on an
> Intel Mac, so I would like to be able to detect the cpu type at
> runtime. I just need a method like:
>
> bool ThisAppIsRunningOnAPowerPC()
>
> Is this a job for Gestalt? It looks so complicated.
It's an API question, not a tools question, so it's not a job for
Xcode. (Though you got two tools-based replies that you might find
useful).
The droid you're looking for is sysctlbyname().
x-man-page://sysctlbyname
file:///usr/include/sys/sysctl.h
You're looking for CTL_HW, HW_MODEL.
Chris
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--
Rick Altherr
Architecture and Performance Group
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