CPXXcallbackgetgloballb and CPXcallbackgetgloballb
The routine CPXXcallbackgetgloballb/CPXcallbackgetgloballb
retrieves the best known globally valid lower bound values during MIP
optimization from within a user-written callback.
int CPXXcallbackgetgloballb( CPXCALLBACKCONTEXTptrcontext, double *lb, CPXDIMbegin, CPXDIMend )
int CPXcallbackgetgloballb( CPXCALLBACKCONTEXTptrcontext, double *lb, intbegin, intend )
Description
The routine CPXXcallbackgetgloballb/CPXcallbackgetgloballb
retrieves the best known globally valid lower bound values during
MIP optimization from within a user-written callback.
The routine can not be invoked in the context CPX_CALLBACKCONTEXT_THREAD_UP nor CPX_CALLBACKCONTEXT_THREAD_DOWN.
Arguments
- context
-
The callback context as passed into the callback function.
- lb
-
An array to receive the values of the lower bound values. This array must be of length at least (
end-begin+1
). If successful,lb[0]
throughlb[end-begin]
contain the lower bound values for the current subproblem. - begin
- An integer specifying the beginning of the range of lower bounds to be returned.
- end
- An integer specifying the end of the range of lower bounds to be returned.
Return
The routine returns 0 (zero) if successful and nonzero if an error occurs.Example
status = CPXcallbackgetgloballb (context, lb, 0, cols-1);