1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*****************************************************************************
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
*****************************************************************************/
#ifndef fil0pagecompress_h
#define fil0pagecompress_h
#include "fsp0fsp.h"
#include "fsp0pagecompress.h"
/******************************************************************//**
@file include/fil0pagecompress.h
Helper functions for extracting/storing page compression and
atomic writes information to table space.
Created 11/12/2013 Jan Lindström jan.lindstrom@skysql.com
***********************************************************************/
/*******************************************************************//**
Find out wheather the page is index page or not
@return true if page type index page, false if not */
UNIV_INLINE
ibool
fil_page_is_index_page(
/*===================*/
byte *buf); /*!< in: page */
/****************************************************************//**
Get the name of the compression algorithm used for page
compression.
@return compression algorithm name or "UNKNOWN" if not known*/
UNIV_INLINE
const char*
fil_get_compression_alg_name(
/*=========================*/
ulint comp_alg); /*!<in: compression algorithm number */
/****************************************************************//**
For page compressed pages compress the page before actual write
operation.
@return compressed page to be written*/
UNIV_INTERN
byte*
fil_compress_page(
/*==============*/
fil_space_t* space, /*!< in,out: tablespace (NULL during IMPORT) */
byte* buf, /*!< in: buffer from which to write; in aio
this must be appropriately aligned */
byte* out_buf, /*!< out: compressed buffer */
ulint len, /*!< in: length of input buffer.*/
ulint level, /* in: compression level */
ulint block_size, /*!< in: block size */
bool encrypted, /*!< in: is page also encrypted */
ulint* out_len); /*!< out: actual length of compressed
page */
/****************************************************************//**
For page compressed pages decompress the page after actual read
operation. */
UNIV_INTERN
void
fil_decompress_page(
/*================*/
byte* page_buf, /*!< in: preallocated buffer or NULL */
byte* buf, /*!< out: buffer from which to read; in aio
this must be appropriately aligned */
ulong len, /*!< in: length of output buffer.*/
ulint* write_size, /*!< in/out: Actual payload size of
the compressed data. */
bool return_error=false);
/*!< in: true if only an error should
be produced when decompression fails.
By default this parameter is false. */
/****************************************************************//**
Get space id from fil node
@return space id*/
UNIV_INTERN
ulint
fil_node_get_space_id(
/*==================*/
fil_node_t* node); /*!< in: Node where to get space id*/
/****************************************************************//**
Get block size from fil node
@return block size*/
UNIV_INLINE
ulint
fil_node_get_block_size(
fil_node_t* node); /*!< in: Node where to get block
size */
/*******************************************************************//**
Find out wheather the page is page compressed
@return true if page is page compressed*/
UNIV_INLINE
ibool
fil_page_is_compressed(
/*===================*/
byte* buf); /*!< in: page */
/*******************************************************************//**
Find out wheather the page is page compressed
@return true if page is page compressed*/
UNIV_INLINE
ibool
fil_page_is_compressed_encrypted(
/*=============================*/
byte* buf); /*!< in: page */
/*******************************************************************//**
Find out wheather the page is page compressed with lzo method
@return true if page is page compressed with lzo method*/
UNIV_INLINE
ibool
fil_page_is_lzo_compressed(
/*=======================*/
byte* buf); /*!< in: page */
#endif
|
