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+/*****************************************************************************
+
+Copyright (c) 2016, MariaDB Corporation. All rights Reserved.
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; version 2 of the License.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
+
+*****************************************************************************/
+
+/**************************************************//**
+@file include/dict0defrag_bg.h
+Code used for background table and index
+defragmentation
+
+Created 25/08/2016 Jan Lindström
+*******************************************************/
+
+#ifndef dict0defrag_bg_h
+#define dict0defrag_bg_h
+
+#include "univ.i"
+
+#include "dict0types.h"
+#include "os0event.h"
+#include "os0thread.h"
+
+/*****************************************************************//**
+Initialize the defrag pool, called once during thread initialization. */
+void
+dict_defrag_pool_init(void);
+/*========================*/
+
+/*****************************************************************//**
+Free the resources occupied by the defrag pool, called once during
+thread de-initialization. */
+void
+dict_defrag_pool_deinit(void);
+/*==========================*/
+
+/*****************************************************************//**
+Add an index in a table to the defrag pool, which is processed by the
+background stats gathering thread. Only the table id and index id are
+added to the list, so the table can be closed after being enqueued and
+it will be opened when needed. If the table or index does not exist later
+(has been DROPped), then it will be removed from the pool and skipped. */
+void
+dict_stats_defrag_pool_add(
+/*=======================*/
+	const dict_index_t*	index);	/*!< in: table to add */
+
+/*****************************************************************//**
+Delete a given index from the auto defrag pool. */
+void
+dict_stats_defrag_pool_del(
+/*=======================*/
+	const dict_table_t*	table,	/*!<in: if given, remove
+					all entries for the table */
+	const dict_index_t*	index);	/*!< in: index to remove */
+
+/*****************************************************************//**
+Get the first index that has been added for updating persistent defrag
+stats and eventually save its stats. */
+void
+dict_defrag_process_entries_from_defrag_pool();
+/*===========================================*/
+
+/*********************************************************************//**
+Save defragmentation result.
+@return DB_SUCCESS or error code */
+dberr_t
+dict_stats_save_defrag_summary(
+/*============================*/
+	dict_index_t*	index)	/*!< in: index */
+	MY_ATTRIBUTE((warn_unused_result));
+
+/*********************************************************************//**
+Save defragmentation stats for a given index.
+@return DB_SUCCESS or error code */
+dberr_t
+dict_stats_save_defrag_stats(
+/*============================*/
+	dict_index_t*	index)	/*!< in: index */
+	MY_ATTRIBUTE((warn_unused_result));
+#endif /* dict0defrag_bg_h */