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/*****************************************************************************
Copyright (C) 2013, 2017, 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*****************************************************************************/
/******************************************************************//**
@file include/fsp0pagecompress.h
Helper functions for extracting/storing page compression and
atomic writes information to file space.
Created 11/12/2013 Jan Lindström jan.lindstrom@skysql.com
***********************************************************************/
#ifndef fsp0pagecompress_h
#define fsp0pagecompress_h
/* Supported page compression methods */
#define PAGE_UNCOMPRESSED 0
#define PAGE_ZLIB_ALGORITHM 1
#define PAGE_LZ4_ALGORITHM 2
#define PAGE_LZO_ALGORITHM 3
#define PAGE_LZMA_ALGORITHM 4
#define PAGE_BZIP2_ALGORITHM 5
#define PAGE_SNAPPY_ALGORITHM 6
#define PAGE_ALGORITHM_LAST PAGE_SNAPPY_ALGORITHM
/**********************************************************************//**
Reads the page compression level from the first page of a tablespace.
@return page compression level, or 0 if uncompressed */
UNIV_INTERN
ulint
fsp_header_get_compression_level(
/*=============================*/
const page_t* page); /*!< in: first page of a tablespace */
/********************************************************************//**
Extract the page compression level from tablespace flags.
A tablespace has only one physical page compression level
whether that page is compressed or not.
@return page compression level of the file-per-table tablespace,
or zero if the table is not compressed. */
UNIV_INLINE
ulint
fsp_flags_get_page_compression_level(
/*=================================*/
ulint flags); /*!< in: tablespace flags */
/********************************************************************//**
Determine the tablespace is using atomic writes from dict_table_t::flags.
@return true if atomic writes is used, false if not */
UNIV_INLINE
atomic_writes_t
fsp_flags_get_atomic_writes(
/*========================*/
ulint flags); /*!< in: tablespace flags */
#ifndef UNIV_NONINL
#include "fsp0pagecompress.ic"
#endif
#endif
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