1 files changed, 65 insertions, 0 deletions
diff --git a/storage/innobase/include/btr0defragment.h b/storage/innobase/include/btr0defragment.h
new file mode 100644
index 00000000..0523829b
--- /dev/null
+++ b/storage/innobase/include/btr0defragment.h
@@ -0,0 +1,65 @@
+/*****************************************************************************
+
+Copyright (C) 2013, 2014 Facebook, Inc. All Rights Reserved.
+Copyright (C) 2014, 2021, MariaDB Corporation.
+
+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, Fifth Floor, Boston, MA 02110-1335 USA
+
+*****************************************************************************/
+
+#ifndef btr0defragment_h
+#define btr0defragment_h
+
+#include "btr0pcur.h"
+
+/* Max number of pages to consider at once during defragmentation. */
+#define BTR_DEFRAGMENT_MAX_N_PAGES	32
+
+/** stats in btr_defragment */
+extern Atomic_counter<ulint> btr_defragment_compression_failures;
+extern Atomic_counter<ulint> btr_defragment_failures;
+extern Atomic_counter<ulint> btr_defragment_count;
+
+/******************************************************************//**
+Initialize defragmentation. */
+void
+btr_defragment_init(void);
+/******************************************************************//**
+Shutdown defragmentation. */
+void
+btr_defragment_shutdown();
+/******************************************************************//**
+Check whether the given index is in btr_defragment_wq. */
+bool
+btr_defragment_find_index(
+	dict_index_t*	index);	/*!< Index to find. */
+/** Defragment an index.
+@param pcur      persistent cursor
+@param thd       current session, for checking thd_killed()
+@return whether the operation was interrupted */
+bool btr_defragment_add_index(btr_pcur_t *pcur, THD *thd);
+/******************************************************************//**
+When table is dropped, this function is called to mark a table as removed in
+btr_efragment_wq. The difference between this function and the remove_index
+function is this will not NULL the event. */
+void
+btr_defragment_remove_table(
+	dict_table_t*	table);	/*!< Index to be removed. */
+/*********************************************************************//**
+Check whether we should save defragmentation statistics to persistent storage.*/
+void btr_defragment_save_defrag_stats_if_needed(dict_index_t *index);
+
+/* Stop defragmentation.*/
+void btr_defragment_end();
+extern bool btr_defragment_active;
+#endif