Re: [PPL-devel] Support for Cartesian Factoring of Polyhedra? thread safe?

Hello Antonio,

sorry for the delay on answering your message: my fault.

On 10/13/14 11:28, aeflores wrote:

My name is Antonio Flores-Montoya and I am a PhD student at the Technical University of Darmstadt. I have been using PPL for a while and I have a couple questions concerning its PPL functionality:

• In the paper of 2008 describing the parma polyhedra library you mention that you planed to implement the techniques described in "Cartesian factoring of polyhedra in linear relation analysis" I have been looking for it in the documentation but I haven't found anything about it. What is the state of this feature? Implemented, planned?

The feature was originally planned but was never implemented for lack of demand and resources. It should not be very difficult to implement though: we just need someone willing to work on in.

• I tried to use the library from a multi-threaded prolog application. When I do that, I get different kinds of crashes that do not happen with a single-threaded version of the same program. Is PPL thread safe? In case it is, are there any considerations that I should take into account for using PPL from a multi-threaded application?

Unfortunately the PPL is not thread safe, even though it is very close at being so. A student of the University of Parma is working at making it thread safe. Kind regards,

Roberto