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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/******************************************************
Mini-transaction logging routines
(c) 1995 Innobase Oy
Created 12/7/1995 Heikki Tuuri
*******************************************************/
#include "mach0data.h"
#include "ut0lst.h"
#include "buf0buf.h"
/************************************************************
Opens a buffer to mlog. It must be closed with mlog_close. */
UNIV_INLINE
byte*
mlog_open(
/*======*/
/* out: buffer, NULL if log mode MTR_LOG_NONE */
mtr_t* mtr, /* in: mtr */
ulint size) /* in: buffer size in bytes */
{
dyn_array_t* mlog;
mtr->modifications = TRUE;
if (mtr_get_log_mode(mtr) == MTR_LOG_NONE) {
return(NULL);
}
mlog = &(mtr->log);
return(dyn_array_open(mlog, size));
}
/************************************************************
Closes a buffer opened to mlog. */
UNIV_INLINE
void
mlog_close(
/*=======*/
mtr_t* mtr, /* in: mtr */
byte* ptr) /* in: buffer space from ptr up was not used */
{
dyn_array_t* mlog;
ut_ad(mtr_get_log_mode(mtr) != MTR_LOG_NONE);
mlog = &(mtr->log);
dyn_array_close(mlog, ptr);
}
/************************************************************
Catenates 1 - 4 bytes to the mtr log. The value is not compressed. */
UNIV_INLINE
void
mlog_catenate_ulint(
/*================*/
mtr_t* mtr, /* in: mtr */
ulint val, /* in: value to write */
ulint type) /* in: MLOG_1BYTE, MLOG_2BYTES, MLOG_4BYTES */
{
dyn_array_t* mlog;
byte* ptr;
if (mtr_get_log_mode(mtr) == MTR_LOG_NONE) {
return;
}
mlog = &(mtr->log);
ut_ad(MLOG_1BYTE == 1);
ut_ad(MLOG_2BYTES == 2);
ut_ad(MLOG_4BYTES == 4);
ptr = dyn_array_push(mlog, type);
if (type == MLOG_4BYTES) {
mach_write_to_4(ptr, val);
} else if (type == MLOG_2BYTES) {
mach_write_to_2(ptr, val);
} else {
ut_ad(type == MLOG_1BYTE);
mach_write_to_1(ptr, val);
}
}
/************************************************************
Catenates a compressed ulint to mlog. */
UNIV_INLINE
void
mlog_catenate_ulint_compressed(
/*===========================*/
mtr_t* mtr, /* in: mtr */
ulint val) /* in: value to write */
{
byte* log_ptr;
log_ptr = mlog_open(mtr, 10);
/* If no logging is requested, we may return now */
if (log_ptr == NULL) {
return;
}
log_ptr += mach_write_compressed(log_ptr, val);
mlog_close(mtr, log_ptr);
}
/************************************************************
Catenates a compressed dulint to mlog. */
UNIV_INLINE
void
mlog_catenate_dulint_compressed(
/*============================*/
mtr_t* mtr, /* in: mtr */
dulint val) /* in: value to write */
{
byte* log_ptr;
log_ptr = mlog_open(mtr, 15);
/* If no logging is requested, we may return now */
if (log_ptr == NULL) {
return;
}
log_ptr += mach_dulint_write_compressed(log_ptr, val);
mlog_close(mtr, log_ptr);
}
/************************************************************
Writes the initial part of a log record. */
UNIV_INLINE
byte*
mlog_write_initial_log_record_fast(
/*===============================*/
/* out: new value of log_ptr */
byte* ptr, /* in: pointer to (inside) a buffer frame holding the
file page where modification is made */
byte type, /* in: log item type: MLOG_1BYTE, ... */
byte* log_ptr,/* in: pointer to mtr log which has been opened */
mtr_t* mtr) /* in: mtr */
{
buf_block_t* block;
ulint space;
ulint offset;
ut_ad(mtr_memo_contains(mtr, buf_block_align(ptr),
MTR_MEMO_PAGE_X_FIX));
ut_ad(type <= MLOG_BIGGEST_TYPE);
ut_ad(ptr && log_ptr);
block = buf_block_align(ptr);
space = buf_block_get_space(block);
offset = buf_block_get_page_no(block);
if (space != 0 || offset > 0x8FFFFFFF) {
fprintf(stderr,
"InnoDB: error: buffer page pointer %lx has nonsensical space id %lu\n"
"InnoDB: or page no %lu\n", (ulint)ptr, space, offset);
ut_error;
}
mach_write_to_1(log_ptr, type);
log_ptr++;
log_ptr += mach_write_compressed(log_ptr, space);
log_ptr += mach_write_compressed(log_ptr, offset);
mtr->n_log_recs++;
#ifdef UNIV_LOG_DEBUG
/* printf("Adding to mtr log record type %lu space %lu page no %lu\n",
type, space, offset); */
#endif
#ifdef UNIV_DEBUG
/* We now assume that all x-latched pages have been modified! */
if (!mtr_memo_contains(mtr, block, MTR_MEMO_MODIFY)) {
mtr_memo_push(mtr, block, MTR_MEMO_MODIFY);
}
#endif
return(log_ptr);
}
|
