bandit_epsgreedy.h

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*                                                                           */
/*                  This file is part of the program and library             */
/*         SCIP --- Solving Constraint Integer Programs                      */
/*                                                                           */
/*    Copyright (C) 2002-2018 Konrad-Zuse-Zentrum                            */
/*                            fuer Informationstechnik Berlin                */
/*                                                                           */
/*  SCIP is distributed under the terms of the ZIB Academic License.         */
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/*  along with SCIP; see the file COPYING. If not email to scip@zib.de.      */
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/**@file   bandit_epsgreedy.h
 * @ingroup INTERNALAPI
 * @brief  internal methods for epsilon greedy bandit selection
 * @author Gregor Hendel
 */

/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/

#ifndef __SCIP_BANDIT_EPSGREEDY_H__
#define __SCIP_BANDIT_EPSGREEDY_H__


#include "scip/scip.h"
#include "scip/bandit.h"

#ifdef __cplusplus
extern "C" {
#endif

/** creates the epsilon greedy bandit algorithm includes it in SCIP */
extern
SCIP_RETCODE SCIPincludeBanditvtableEpsgreedy(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** callback to free bandit specific data structures */
extern
SCIP_DECL_BANDITFREE(SCIPbanditFreeEpsgreedy);

/** selection callback for bandit algorithm */
extern
SCIP_DECL_BANDITSELECT(SCIPbanditSelectEpsgreedy);

/** update callback for bandit algorithm */
extern
SCIP_DECL_BANDITUPDATE(SCIPbanditUpdateEpsgreedy);

/** reset callback for bandit algorithm */
extern
SCIP_DECL_BANDITRESET(SCIPbanditResetEpsgreedy);


/** internal method to create and reset epsilon greedy bandit algorithm */
extern
SCIP_RETCODE SCIPbanditCreateEpsgreedy(
   BMS_BLKMEM*           blkmem,             /**< block memory */
   BMS_BUFMEM*           bufmem,             /**< buffer memory */
   SCIP_BANDITVTABLE*    vtable,             /**< virtual function table with epsilon greedy callbacks */
   SCIP_BANDIT**         epsgreedy,          /**< pointer to store the epsilon greedy bandit algorithm */
   SCIP_Real*            priorities,         /**< nonnegative priorities for each action, or NULL if not needed */
   SCIP_Real             eps,                /**< parameter to increase probability for exploration between all actions */
   int                   nactions,           /**< the number of possible actions */
   unsigned int          initseed            /**< initial random seed */
   );

#ifdef __cplusplus
}
#endif

#endif