[Vxl-users] Multithread problems

[Daniel M. <dan...@da...>]

Hi all,

I tried to use vxl in a multithreaded program and it didn't work.

I took a look to the vxl code and I found that there's a bunch of=20
functions that declare their local variables as static. I don't really=20
know if this use of static is because they have to keep its values=20
between calls or is the deprecated use as local variable but I believe=20
they are the cause of the failure on my multithreading use.

Probably what happens is that those variables are modified by the=20
different threads at the same time. The definition of the variables=20
without the static would solve this problem because each call to the=20
function would use a different instantiation of the variable.

I hope this could help to make this great library multithread safe=20
although I don't know if this is one of the objectives of vxl

--=20
Daniel J. Marin

Datapixel SL
Rda Sta Eul=E0lia 37 Pol Ind 1 Nau 13
08780 Pallej=E0
Barcelona, Catalunya, SPAIN

Tel. +34 93 663 30 43
Fax. +34 93 663 18 38

e-mail: dan...@da...
URL: http://www.datapixel.com

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