XPRSaddcbinfnode
XPRSaddcbinfnode |
Purpose
Declares a user infeasible
node callback function, called after the current node has been found to be infeasible during the Branch and Bound
search. This callback function will be called in addition to any callbacks already added by XPRSaddcbinfnode.
Synopsis
int XPRS_CC XPRSaddcbinfnode(XPRSprob prob, void (XPRS_CC *f_infnode)(XPRSprob my_prob, void *my_object), void *object, int priority);
Arguments
|
prob
|
The current problem
|
|
f_infnode
|
The callback function which takes two arguments,
my_prob and
my_object, and has no return value. This function is called after the current node has been found to be infeasible.
|
|
my_prob
|
The problem passed to the callback function,
f_infnode.
|
|
my_object
|
The user-defined object passed as
object when setting up the callback with
XPRSaddcbinfnode.
|
|
object
|
A user-defined object to be passed to the callback function,
f_infnode.
|
|
priority
|
An integer that determines the order in which multiple user infeasible node callbacks will be invoked. The callback added with a higher priority will be called before a callback with a lower priority. Set to 0 if not required.
|
Example
The following notifies the user whenever an infeasible node is found during the global search:
XPRSaddcbinfnode(prob,nodeInfeasible,NULL,0); XPRSmipoptimize(prob,"");
The callback function may resemble:
void XPRS_CC nodeInfeasible(XPRSprob prob, void *object)
{
int node;
XPRSgetintattrib(prob, XPRS_CURRENTNODE, &node);
printf("Node %d infeasible\n", node);
}
See the example
depthfirst.c in the
examples/optimizer/c folder.
Related topics