Re: [Help-glpk] Embedding GLPK to user application

[Andrew Makhorin]

> I try to embed #8220;GLPK-solver #8221; to user application. The main
> problem is the application #8217;s #8220;hanging up #8221; during
> solution process. User what to see solving progress and view best
> feasible solution during solving process in his GUI application. With
> #8220;lp_solve #8221; this problem solved by using callback functions.
> Callbacks raises on each simplex iteration and on each improving solution
> found. Programmer may put his code to callback functions to iteration
> with user (handling mouse, keyboard and windows events) and fetching
> viewing feasible solutions. If callback function return false then
> solving process is halted. So, programmer may supply user by
> possibilities stop solving process in any moment of time.

> How this can be implemented with  #8220;GLPK-solver #8221;?

In the same way. The glpk mip solver (api routine glp_intopt) allows
using the event-controlled callback routine. For more details please
see the glpk reference manual, chapter "Branch-and-Cut API Routines".

> Are you plan to enhance the DLL-interface of   #8220;GLPK #8221;?

Glpk is written in the standard C and therefore has no "DLL-interface".
It has API, which does not depend on features of a particular operating
system.