Purpose
Declares a preprocess node
callback function, called before the
node has been optimized, so the solution at the node will not be available.
Synopsis
int XPRS_CC XPRSsetcbprenode(XPRSprob prob, void (XPRS_CC *fupn)(XPRSprob my_prob, void *my_object, int
*nodinfeas), void *object);
Arguments
|
prob
|
The current problem.
|
|
fupn
|
The callback function, which takes three arguments, my_prob, my_object and nodinfeas, and has no return value. This function is called before a node is reoptimized and the node may be made infeasible by setting
*nodinfeas to 1.
|
|
my_prob
|
The problem passed to the callback function, fupn.
|
|
my_object
|
The user-defined object passed as object when setting up the callback with XPRSsetcbprenode.
|
|
nodinfeas
|
Whether or not the node is infeasible. If the node is found to be infeasible during preprocessing, this is set to 1 indicating that the node should not be re-optimized.
|
|
object
|
A user-defined object to be passed to the callback function, fupn.
|
Example
The following example notifies the user before each node is processed:
XPRSsetcbprenode(prob, preNode, NULL);
XPRSminim(prob,"g");
The callback function might resemble:
void XPRS_CC preNode(XPRSprob prob, void* data, int *Nodinfeas)
{
*Nodinfeas = 0; /* set to 1 if node is infeasible */
}
Related topics
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