From: "Matthew K. Williams" <matt@...>
Date: 2010-01-16T01:44:35+09:00
Subject: Re: How to know the OS architecture (32 or 64 bits)?

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On Sat, 16 Jan 2010, Walton Hoops wrote:

> On 1/15/2010 9:36 AM, Walton Hoops wrote:
>> On 1/14/2010 4:12 PM, I=C3=B1aki Baz Castillo wrote:
>>> Hi, is there a reliable way under Ruby to know the OS architecture (32 =
or=20
>>> 64
>>> bits)?
>>>=20
>>> I've just found RUBY_PLATFORM constant which returns "x86_64-linux" und=
er=20
>>> 64
>>> bits, however it doesn't send very reliable for me.
>>>=20
>>> I need a way working under Linux and BSD. Thanks for any suggestion.
>>>=20
>>=20
>> I can't vouch for how accurate it is, but an OS gem was recently announc=
ed=20
>> on this list.
>> gem install os
>>=20
>> irb(main):001:0> require 'os'
>> =3D> true
>> irb(main):002:0> OS.bits
>> =3D> 64
>> irb(main):004:0> OS.posix?
>> =3D> true
>> irb(main):005:0>
>>=20
>>=20
> Hmm.. it does not appear to deal with 32-bit ruby running on a 64 bit sys=
tem=20
> though.
> On my Windows 7 x64 (with 32-bit ruby):
> irb(main):005:0> OS.bits
> =3D> 32
> irb(main):006:0> 1.size
> =3D> 4
> irb(main):007:0>
>

Correct me if I'm wrong, but don't 32bit apps running in a 64bit=20
architecture run in a special space which mimics 32 bits?  If that's the=20
case, then I'd think the behaviour was as expected.

Matt
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