Re: [Help-glpk] Determining if glp_error_hook is set

[Andrew Makhorin]

> in glpk-java I use the glp_error_hook. I set it before calling
> a function and use setjmp.

> This is what my error handler looks like:

> void glp_java_error_hook(void *in) {
>     /* free GLPK memory */
>     glp_free_env();
>     /* safely return */
>     longjmp(*((jmp_buf*)in), 1);

> When in a callback a glp_functions fails this results
> in the wrong long jump being executed because the glpk-java
> wrapper library is not aware of the callback.

> Is there a way to determine if the error hook function is
> already set or not?

Currently not, however, glp_error_hook can be changed to return, say,
the following structure:

typedef struct { void *func, *info; } glp_hook;

(also suitable for glp_term_hook). Would this be sufficient?

> I am missing functions to retrieve the error hook function and
> the info which could be used to build a chain of error
> handlers.