CPXXgetlpcallbackfunc and CPXgetlpcallbackfunc

Accesses the user-written legacy callback routine to be called after each iteration during the optimization of a continuous problem (LP, QP, or QCP), and also periodically during the CPLEX presolve algorithm.

int CPXXgetlpcallbackfunc( CPXCENVptr env, int(CPXPUBLIC **callback_p)(CPXCENVptr, void *, int, void *), void ** cbhandle_p )

int CPXgetlpcallbackfunc( CPXCENVptr env, int(CPXPUBLIC **callback_p)(CPXCENVptr, void *, int, void *), void ** cbhandle_p )

Description

The routine CPXXgetlpcallbackfunc/CPXgetlpcallbackfunc accesses the user-written legacy callback routine to be called after each iteration during the optimization of a continuous problem (LP, QP, or QCP), and also periodically during the CPLEX presolve algorithm.

For documentation of the user-written LP callback functions, see CPXXsetlpcallbackfunc and CPXsetlpcallbackfunc.

Tip:

This routine is part of legacy callbacks. Do not use this routine with a generic callback in your application. For more about generic callbacks, see the topic Generic callbacks in the CPLEX User's Manual.

Arguments

env: A pointer to the CPLEX environment as returned by CPXXopenCPLEX/CPXopenCPLEX.
callback_p: The address of the pointer to the current user-written callback function. If no callback function has been set, the pointer evaluates to NULL.
cbhandle_p: The address of a variable to hold the user's private pointer.

Return

The routine returns 0 (zero) if successful and nonzero if an error occurs.

Example


status = CPXgetlpcallbackfunc (env, mycallback, NULL);