CPXXcallbackgetincumbent and CPXcallbackgetincumbent

Gets the incumbent solution and its objective value for callback invocations in the context CPX_CALLBACKCONTEXT_CANDIDATE.dita.

int CPXXcallbackgetincumbent( CPXCALLBACKCONTEXTptr context, double *x, CPXDIM begin, CPXDIM end, double *obj_p, )

int CPXcallbackgetincumbent( CPXCALLBACKCONTEXTptr context, double *x, CPXDIM begin, CPXDIM end, double *obj_p, )

Description

This routine queries the current incumbent solution.

Tip: Depending on the context in which the callback was invoked, the queried incumbent is globally valid (CPX_CALLBACKCONTEXT_GLOBAL_PROGRESS) or valid only in the calling thread (all other contexts).

Arguments

context: The callback context as passed into the user-written callback function.
x: Buffer to store the values queried. The buffer must have size at least 1+end-end. The buffer can be NULL if begin and end specify an empty range.
begin: First column (inclusive) to query from the incumbent solution.
end: Last column (inclusive) to query from the incumbent solution.
obj_p: Buffer to store the objective value of the incumbent solution. This buffer can be NULL. If there is no incumbent solution, then a very large value will be returned in this buffer.

Return

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