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XSLPsetcbintsol

XSLPsetcbintsol

Purpose
Set a user callback to be called during MISLP when an integer solution is obtained
Synopsis
int XPRS_CC XSLPsetcbintsol(XSLPprob Prob, int (XPRS_CC *UserFunc) (XSLPprob myProb, void *myObject), void *Object);
Arguments
Prob 
The current SLP problem.
UserFunc 
The function to be called when an integer solution is obtained. UserFunc returns an integer value. At present, the return value is ignored.
myProb 
The problem passed to the callback function.
myObject 
The user-defined object passed as Object to XSLPsetcbintsol.
Object 
Address of a user-defined object, which can be used for any purpose by the function. Object is passed to UserFunc as myObject.
Example
The following example sets up a callback to be executed whenever an integer solution is found during MISLP: 
double *cSol;
XSLPsetcbintsol(Prob, CBIntSol, &cSol);
The following sample callback function saves the solution values for the integer solution just found: 
int XPRS_CC CBIntSol(XSLPprob MyProb, void *Obj) {
  XPRSprob xprob;
  double *cSol;
  cSol = * (double **) Obj;
  XSLPgetptrattrib(MyProb, XSLP_XPRSPROBLEM, &xprob);
  XPRSgetsol(xprob, cSol, NULL, NULL, NULL);
  return 0;
}
The Object argument is used here to hold the address of the array cSol which we assume was assigned using one of the malloc functions.
Further information

This callback must be used during MISLP instead of the XPRSsetcbintsol callback which is used for MIP problems.


Related topics
XSLPsetcboptnode, XSLPsetcbprenode

Parent Topic Library functions

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