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XPRSaddcbbarlog

XPRSaddcbbarlog

Purpose
Declares a barrier log callback function, called at each iteration during the interior point algorithm. This callback function will be called in addition to any barrier log callbacks already added by XPRSaddcbbarlog.
Synopsis
int XPRS_CC XPRSaddcbbarlog (XPRSprob prob, int (XPRS_CC *f_barlog)(XPRSprob my_prob, void *my_object), void *object, int priority);
Arguments
prob 
The current problem.
f_barlog 
The callback function itself. This takes two arguments, my_prob and my_object, and has an integer return value. If the value returned by f_barlog is nonzero, the solution process will be interrupted. This function is called at every barrier iteration.
my_prob 
The problem passed to the callback function, f_barlog.
my_object 
The user-defined object passed as object when setting up the callback with XPRSaddcbbarlog.
object 
A user-defined object to be passed to the callback function, f_barlog.
priority 
An integer that determines the order in which multiple barrier log 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
This simple example prints a line to the screen for each iteration of the algorithm. 
XPRSaddcbbarlog(prob,barLog,NULL,0);
XPRSlpoptimize(prob,"b");
The callback function might resemble: 
int XPRS_CC barLog(XPRSprob prob, void *object)
{
  printf("Next barrier iteration\n");
}
Further information
If the callback function returns a nonzero value, the Optimizer run will be interrupted.
Related topics
XPRSremovecbbarlog, XPRSaddcbgloballog, XPRSaddcblplog, XPRSaddcbmessage.

Parent Topic Console and Library Functions

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