struct_colpool.h

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/*                  This file is part of the program                         */
/*          GCG --- Generic Column Generation                                */
/*                  a Dantzig-Wolfe decomposition based extension            */
/*                  of the branch-cut-and-price framework                    */
/*         SCIP --- Solving Constraint Integer Programs                      */
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/*                         Zuse Institute Berlin (ZIB)                       */
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/**@file   struct_colpool.h
 * @ingroup DATASTRUCTURES
 * @brief  data structures for storing cols in a col pool
 * @author Jonas Witt
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef __SCIP_STRUCT_COLPOOL_H__
#define __SCIP_STRUCT_COLPOOL_H__
 
 
#include "scip/def.h"
#include "scip/type_clock.h"
#include "scip/type_misc.h"
#include "scip/type_lp.h"
#include "type_colpool.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** storage for pooled cols */
struct GCG_Colpool
{
   SCIP*                 scip;               /**< SCIP data structure */
   SCIP_Longint          nodenr;             /**< node at which columns in colpool respect branching decisions */
   SCIP_Bool             infarkas;           /**< in Farkas pricing? */
   SCIP_Longint          ncalls;             /**< number of times, the colpool was separated */
   SCIP_Longint          ncolsfound;         /**< total number of cols that were separated from the pool */
   SCIP_CLOCK*           poolclock;          /**< pricing time */
   SCIP_HASHTABLE*       hashtable;          /**< hash table to identify already stored cols */
   GCG_COL**             cols;               /**< stored cols of the pool */
   SCIP_Longint          processedlp;        /**< last LP that has been processed for separating the LP */
   SCIP_Longint          processedlpsol;     /**< last LP that has been processed for separating other solutions */
   int                   colssize;           /**< size of cols array */
   int                   ncols;              /**< number of cols stored in the pool */
   int                   agelimit;           /**< maximum age a col can reach before it is deleted from the pool */
   int                   firstunprocessed;   /**< first col that has not been processed in the last LP */
   int                   firstunprocessedsol;/**< first col that has not been processed in the last LP when separating other solutions */
   int                   maxncols;           /**< maximal number of cols stored in the pool at the same time */
   SCIP_Bool             globalcolpool;      /**< is this the global col pool of SCIP? */
};
 
#ifdef __cplusplus
}
#endif
 
#endif