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
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Prob
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The current SLP problem.
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UserFunc
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The function to be called when an integer solution is obtained.
UserFunc returns an integer value. At present, the return value is ignored.
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myProb
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The problem passed to the callback function.
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myObject
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The user-defined object passed as
Object to
XSLPsetcbintsol.
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Object
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Address of a user-defined object, which can be used for any purpose by the function.
Object is passed to
UserFunc as
myObject.
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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