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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*****************************************************************************
Copyright (c) 1995, 2015, Oracle and/or its affiliates. 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/buf0types.h
The database buffer pool global types for the directory
Created 11/17/1995 Heikki Tuuri
*******************************************************/
#ifndef buf0types_h
#define buf0types_h
#include "os0event.h"
#include "ut0ut.h"
/** Buffer page (uncompressed or compressed) */
class buf_page_t;
/** Buffer block for which an uncompressed page exists */
struct buf_block_t;
/** Buffer pool chunk comprising buf_block_t */
struct buf_chunk_t;
/** Buffer pool comprising buf_chunk_t */
struct buf_pool_t;
/** Buffer pool statistics struct */
struct buf_pool_stat_t;
/** Buffer pool buddy statistics struct */
struct buf_buddy_stat_t;
/** Doublewrite memory struct */
struct buf_dblwr_t;
/** Flush observer for bulk create index */
class FlushObserver;
/** A buffer frame. @see page_t */
typedef byte buf_frame_t;
/** Flags for flush types */
enum buf_flush_t {
BUF_FLUSH_LRU = 0, /*!< flush via the LRU list */
BUF_FLUSH_LIST, /*!< flush via the flush list
of dirty blocks */
BUF_FLUSH_SINGLE_PAGE, /*!< flush via the LRU list
but only a single page */
BUF_FLUSH_N_TYPES /*!< index of last element + 1 */
};
/** Algorithm to remove the pages for a tablespace from the buffer pool.
See buf_LRU_flush_or_remove_pages(). */
enum buf_remove_t {
BUF_REMOVE_ALL_NO_WRITE, /*!< Remove all pages from the buffer
pool, don't write or sync to disk */
BUF_REMOVE_FLUSH_NO_WRITE, /*!< Remove only, from the flush list,
don't write or sync to disk */
BUF_REMOVE_FLUSH_WRITE /*!< Flush dirty pages to disk only
don't remove from the buffer pool */
};
/** Flags for io_fix types */
enum buf_io_fix {
BUF_IO_NONE = 0, /**< no pending I/O */
BUF_IO_READ, /**< read pending */
BUF_IO_WRITE, /**< write pending */
BUF_IO_PIN /**< disallow relocation of
block and its removal of from
the flush_list */
};
/** Alternatives for srv_checksum_algorithm, which can be changed by
setting innodb_checksum_algorithm */
enum srv_checksum_algorithm_t {
SRV_CHECKSUM_ALGORITHM_CRC32, /*!< Write crc32, allow crc32,
innodb or none when reading */
SRV_CHECKSUM_ALGORITHM_STRICT_CRC32, /*!< Write crc32, allow crc32
when reading */
SRV_CHECKSUM_ALGORITHM_INNODB, /*!< Write innodb, allow crc32,
innodb or none when reading */
SRV_CHECKSUM_ALGORITHM_STRICT_INNODB, /*!< Write innodb, allow
innodb when reading */
SRV_CHECKSUM_ALGORITHM_NONE, /*!< Write none, allow crc32,
innodb or none when reading */
SRV_CHECKSUM_ALGORITHM_STRICT_NONE /*!< Write none, allow none
when reading */
};
inline
bool
is_checksum_strict(srv_checksum_algorithm_t algo)
{
return(algo == SRV_CHECKSUM_ALGORITHM_STRICT_CRC32
|| algo == SRV_CHECKSUM_ALGORITHM_STRICT_INNODB
|| algo == SRV_CHECKSUM_ALGORITHM_STRICT_NONE);
}
inline
bool
is_checksum_strict(ulint algo)
{
return(algo == SRV_CHECKSUM_ALGORITHM_STRICT_CRC32
|| algo == SRV_CHECKSUM_ALGORITHM_STRICT_INNODB
|| algo == SRV_CHECKSUM_ALGORITHM_STRICT_NONE);
}
/** Parameters of binary buddy system for compressed pages (buf0buddy.h) */
/* @{ */
/** Zip shift value for the smallest page size */
#define BUF_BUDDY_LOW_SHIFT UNIV_ZIP_SIZE_SHIFT_MIN
/** Smallest buddy page size */
#define BUF_BUDDY_LOW (1U << BUF_BUDDY_LOW_SHIFT)
/** Actual number of buddy sizes based on current page size */
#define BUF_BUDDY_SIZES (UNIV_PAGE_SIZE_SHIFT - BUF_BUDDY_LOW_SHIFT)
/** Maximum number of buddy sizes based on the max page size */
#define BUF_BUDDY_SIZES_MAX (UNIV_PAGE_SIZE_SHIFT_MAX \
- BUF_BUDDY_LOW_SHIFT)
/** twice the maximum block size of the buddy system;
the underlying memory is aligned by this amount:
this must be equal to UNIV_PAGE_SIZE */
#define BUF_BUDDY_HIGH (BUF_BUDDY_LOW << BUF_BUDDY_SIZES)
/* @} */
#ifndef UNIV_INNOCHECKSUM
#include "ut0mutex.h"
#include "sync0rw.h"
typedef ib_bpmutex_t BPageMutex;
typedef ib_mutex_t BufPoolMutex;
typedef ib_mutex_t FlushListMutex;
typedef BPageMutex BufPoolZipMutex;
typedef rw_lock_t BPageLock;
#endif /* !UNIV_INNOCHECKSUM */
#endif /* buf0types.h */
|
