[Ipopt] Run ipopt instance per thread for parallel computing

[Stefan Vigerske]

Hi,

I had experienced no problem with running Ipopt in a multithread 
environment so far. But I would not recognize easily if it just computes 
a wrong point and does not crash.

Stefan

On 07/25/2012 11:41 PM, George Zhou wrote:
> Hi, All,
>
> https://projects.coin-or.org/Ipopt/ticket/167#comment:1,
>
>  From Andreas's comments, I think the following two changes could make application run ipopt in parallel, as long each thread only access its own instance of ipopt
>
> 1)      Declare ipopt as TLS variable. (per thread based)
>
> 2)      In Ipopt/src/Common/IpTaggedObject.hpp, change the following two variables as TLS variable or atomic ones:
>
> static Tag unique_tag_;
>
> Tag tag_
> Anyone has successful story to run multiple instances of ipopt in one application?
>
> Thanks
> George
>
>
>
>
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