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Re: [cgal-discuss] Multithreading, Contribution


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  • From: Bernhard Kornberger <>
  • To:
  • Subject: Re: [cgal-discuss] Multithreading, Contribution
  • Date: Sat, 24 Jan 2015 13:26:27 +0100

Am 2015-01-22 um 17:22 schrieb Marius Kintel:
On Jan 21, 2015, at 06:06 AM, Bernhard Kornberger
<>
wrote:

To this end they needed to patch CGAL to achieve thread safety for
the Exact_predicates_exact_constructions_kernel. Now I'd like to
contribute this patch and possibly start a discussion about it:

Sounds very cool. The lack of thread safeness is a major concern for us
(OpenSCAD) when using CGAL.
I’m not familiar with the inner workings of the shared objects in CGAL, but
do you think your patch will make it possible to execute multiple Nef
polyhedron CSG operations in parallel (i.e. multiple threads reading from the
same operands but producing different output) ?

Kind Regards,

-Marius

The patch makes the basic number type thread safe, i.e. parallel
operations on basic objects (Point, Segment, Plane, ...) like
orientation tests and intersections will work now. I don't know
the NEF package very well but maybe it benefits.

Best
Bernhard Kornberger





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