Re: 64 bit to 32 bit

On Nov 13, 2009, at 12:19 PM, Glen Wernersbach wrote:
> The is a lot of other processing that would therotically be faster and lets 
> face it. Apple is moving to a 64 bit kernel.

And theoretically using a 64-to-32 shim process to make use of that 32-bit 
dylib will negate any performance improvement you'll see with your filter 
compiled as 64-bit. Moreover, most machines sit basically idle driving a 
printer - interface bandwidth and print engine speed are usually the bottleneck.

Regardless of whether the kernel is running 64-bit, Apple still supports and 
ships 32-bit applications, so my "official" recommendation is to build the 
filter 32-bit... If you want to do something with a 32-bit dylib from a 64-bit 
application, you'll need to use a 32-bit shim program with the necessary 
interfaces to transfer data and function calls between the 64-bit and 32-bit 
sides.

> 
> 
> 
> On 11/12/09 3:07 PM, "Michael Sweet" <[EMAIL PROTECTED]> wrote:
> 
>> Is there a reason why you want to build the CUPS filter 64-bit?
>> 
>> Given that you are already pulling in a 32-bit dylib, the simple answer is 
>> just to build the filter 32-bit only.
>> 
>> On Nov 12, 2009, at 11:54 AM, Glen Wernersbach wrote:
>> 
>>> Hi All,
>>> 
>>> I have a cups 64 bit raster filter that needs to call some existing 32 bit 
>>> dylib image utilities that I don’t have source code to. I know I need to 
>>> build some type of help host to be able to do this but I can’t find 
>>> anywhere on Apple dev center example code to do this.  Can any point me in 
>>> the right direction?
>>> 
>>> Glen
>>> -- .
>>> Glen Wernersbach
>>> President & CTO
>>> 
>>> Jetsoft Development Co.
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>> 
>> ___________________________________________________
>> Michael Sweet, Senior Printing System Engineer
>> 
>> 
>> 
>> 
> 
> -- 
> Glen Wernersbach
> President & CTO
> <image.png>
> Jetsoft Development Co.
> 629 Old St Rt. 74 – Suite 210
> Cincinnati, Oh 45244
> Custom Programming Web Site: www.jetsoftdev.com
> Retail Products Web Site: www.scanhelp.com
> Phone:   513-528-6660
> Fax: 513-528-3470
> ----
> "Support Dyslexia Research"

___________________________________________________
Michael Sweet, Senior Printing System Engineer



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