checking if machine is 64-bit
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Newsgroups: comp.lang.ruby
From:
Suraj Kurapati <s... @gna.org> Date: Sun, 29 Jul 2007 02:42:46 +0900
Local: Sat, Jul 28 2007 1:42 pm
Subject: checking if machine is 64-bit
Hello, I am checking if the machine is 64-bit by doing this:
require 'rbconfig'
Is there a better way?
Thanks. http://www.ruby-forum.com/ .
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From:
"Michael Fellinger" <m.fellin... @gmail.com> Date: Sun, 29 Jul 2007 04:03:28 +0900
Local: Sat, Jul 28 2007 3:03 pm
Subject: Re: checking if machine is 64-bit
On 7/29/07, Suraj Kurapati <s... @gna.org> wrote:
> Hello,
> I am checking if the machine is 64-bit by doing this:
> require 'rbconfig'
> Is there a better way?
Not that i know of. ^ manveru
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From:
Daniel Berger <djber... @gmail.com> Date: Sun, 29 Jul 2007 04:50:01 +0900
Local: Sat, Jul 28 2007 3:50 pm
Subject: Re: checking if machine is 64-bit
On Jul 28, 11:42 am, Suraj Kurapati <s... @gna.org> wrote:
> Hello,
> I am checking if the machine is 64-bit by doing this:
> require 'rbconfig'
> Is there a better way?
Might need some tweaking once the 128 bit operating systems show up...
Regards,
Dan
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Newsgroups: comp.lang.ruby
From:
Suraj Kurapati <s... @gna.org> Date: Sun, 29 Jul 2007 07:31:35 +0900
Local: Sat, Jul 28 2007 6:31 pm
Subject: Re: checking if machine is 64-bit
Daniel Berger wrote:
Excellent idea. However, note that it takes 34 bits to represent 2**33, is_machine_64_bit = (2 ** 32).is_a? Fixnum http://www.ruby-forum.com/ .
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Newsgroups: comp.lang.ruby
From:
Suraj Kurapati <s... @gna.org> Date: Sun, 29 Jul 2007 07:40:11 +0900
Local: Sat, Jul 28 2007 6:40 pm
Subject: Re: checking if machine is 64-bit
Suraj Kurapati wrote:
Hmm, after reading the ri manpage for Fixnum, I found a better way: (-1.size) is 4 on a 32-bit machine and 8 on a 64-bit machine. http://www.ruby-forum.com/ .
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From:
Xeno Campanoli <xcampan... @gmail.com> Date: Sun, 29 Jul 2007 07:51:19 +0900
Local: Sat, Jul 28 2007 6:51 pm
Subject: Re: checking if machine is 64-bit
Suraj Kurapati wrote:
> Suraj Kurapati wrote:
>> is_machine_64_bit = (2 ** 32).is_a? Fixnum
> Hmm, after reading the ri manpage for Fixnum, I found a better way:
> (-1.size) is 4 on a 32-bit machine and 8 on a 64-bit machine.
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From:
Lionel Bouton <lionel-subscript... @bouton.name> Date: Sun, 29 Jul 2007 07:56:17 +0900
Local: Sat, Jul 28 2007 6:56 pm
Subject: Re: checking if machine is 64-bit
Suraj Kurapati wrote:
> Suraj Kurapati wrote:
>> is_machine_64_bit = (2 ** 32).is_a? Fixnum
> Hmm, after reading the ri manpage for Fixnum, I found a better way:
> (-1.size) is 4 on a 32-bit machine and 8 on a 64-bit machine.
Lionel.
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From:
"Logan Capaldo" <logancapa... @gmail.com> Date: Sun, 29 Jul 2007 08:30:05 +0900
Local: Sat, Jul 28 2007 7:30 pm
Subject: Re: checking if machine is 64-bit
On 7/28/07, Lionel Bouton <lionel-subscript... @bouton.name> wrote:
> Suraj Kurapati wrote:
> >> is_machine_64_bit = (2 ** 32).is_a? Fixnum
> > Hmm, after reading the ri manpage for Fixnum, I found a better way:
> > (-1.size) is 4 on a 32-bit machine and 8 on a 64-bit machine.
> I don't know if it matters to you, but IIRC there are architectures with
Lionel.
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From:
Nobuyoshi Nakada <n... @ruby-lang.org> Date: Sun, 29 Jul 2007 08:38:11 +0900
Local: Sat, Jul 28 2007 7:38 pm
Subject: Re: checking if machine is 64-bit
Hi, At Sun, 29 Jul 2007 02:42:46 +0900,
> I am checking if the machine is 64-bit by doing this:
> require 'rbconfig'
> Is there a better way?
If you are trying to compile an extension library:
is_machine_64_bit = check_sizeof("int") == 64
is_machine_64_bit = try_static_assert("sizeof int == 64")
or, better in C source(s):
#if SIZEOF_VOIDP == 8
Otherwise, if you want to know the current running platform is
is_machine_64_bit = [0].pack("i!").size == 8
Note that all of the above check for the size of int.
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Newsgroups: comp.lang.ruby
From:
Lloyd Linklater <ll... @2live4.com> Date: Mon, 30 Jul 2007 21:53:06 +0900
Local: Mon, Jul 30 2007 8:53 am
Subject: Re: checking if machine is 64-bit
Suraj Kurapati wrote:
Very slick! Nice find! -- http://www.ruby-forum.com/ .
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From:
"M. Edward (Ed) Borasky" <zn... @cesmail.net> Date: Mon, 30 Jul 2007 22:20:14 +0900
Local: Mon, Jul 30 2007 9:20 am
Subject: Re: checking if machine is 64-bit
Lloyd Linklater wrote:
> Suraj Kurapati wrote:
>> (-1.size) is 4 on a 32-bit machine and 8 on a 64-bit machine.
> Very slick! Nice find!
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