| Overview | Group | Index | Concepts |
This is an advanced routine. Advanced routines typically demand a thorough understanding of the algorithms used by ILOG CPLEX. Thus they incur a higher risk of incorrect behavior in your application, behavior that can be difficult to debug. Therefore, ILOG encourages you to consider carefully whether you can accomplish the same task by means of other Callable Library routines instead.
The routine CPXgetcutcallbackfunc accesses the
user-written callback for adding cuts. The user-written callback is called
by ILOG CPLEX during MIP branch & cut for every node that has an LP
optimal solution with objective value below the cutoff and that is integer
infeasible. CPLEX also calls the callback when comparing an integer
feasible solution, including one provided by a MIP start
before any nodes exist, against lazy constraints.
The callback routine adds globally valid cuts to the LP
subproblem.
Example
CPXgetcutcallbackfunc(env, ¤t_cutfunc, ¤t_data);
See also Advanced MIP Control Interface in the ILOG CPLEX User's Manual.
For documentation of callback arguments, see the routine
CPXsetcutcallbackfunc.
Parameters
env
A pointer to the CPLEX environment,
as returned by CPXopenCPLEX.
cutcallback_p
The address of the pointer to the current user-written cut callback. If no callback has been set, the pointer evaluates to NULL.
cbhandle_p
The address of a variable to hold the user's private pointer.
See Also:
CPXcutcallbackadd, CPXsetcutcallbackfunc