Re: [Lcms-user] pthread support in lcms 1.16

[Louis S. [SteelBytes] <lo...@st...>]

an example off the top of my head why funcs like cmsTakeProductName should 
be made thread safe ...

an image processing app that is given a batch of images to convert from one 
profile to another, and it is logging their original profile details as part 
of the process.

Louis Solomon
www.SteelBytes.com

----- Original Message ----- 
From: "Marti Maria" <mar...@li...>
To: "'Cyrille Berger'" <cb...@cb...>; 
<lcm...@li...>
Sent: Friday, December 29, 2006 10:57 PM
Subject: Re: [Lcms-user] pthread support in lcms 1.16


>
> Hi Cyrille,
>
>> I wanted to know if pthread support in lcms 1.16 meant that the
>> functions in lcms were thread safe ?
>
> Yes, that is.
>
>> And especially if that meant that
>> it is now safe to share cmsHTRANSFORM between threads ?
>
> Yep.
>
> The details are: cache in 1.16 is now limited to
> each invocation of cmsDoTransform and stored in
> the stack. This eliminates 99,9% of chance of
> conflicts. For the remaining 0,1% you may turn
> on the pthread support by editing lcms.h, but in
> my testing it worked fine without that.
>
> Also, this applies only to transform logic.
> Functions that retrieve textual information
> (cmsTakeProductName and alike) are not thread
> safe, but I wonder why anybody would like
> to do so.
>
> Keep up your good work on Krita.
> Regards
>
> Marti Maria
> The littleCMS project
> www.littlecms.com
>
>
>
> -----Original Message-----
> From: lcm...@li...
> [mailto:lcm...@li...] On Behalf Of Cyrille 
> Berger
> Sent: Friday, December 29, 2006 12:33 PM
> To: lcm...@li...
> Subject: [Lcms-user] pthread support in lcms 1.16
>
> I wanted to know if pthread support in lcms 1.16 meant that the
> functions in lcms were thread safe ? And especially if that meant that
> it is now safe to share cmsHTRANSFORM between threads ?
>
> -- 
> Cyrille Berger
>
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