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
|
/* Copyright (C) 2003 MySQL AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef PLUGIN_ARCHIVE_HA_ARCHIVE_H
#define PLUGIN_ARCHIVE_HA_ARCHIVE_H
/*
Please read ha_archive.cc first. If you are looking for more general
answers on how storage engines work, look at ha_example.cc and
ha_example.h.
*/
typedef struct st_archive_record_buffer {
unsigned char *buffer;
uint32_t length;
} archive_record_buffer;
class ArchiveShare {
public:
ArchiveShare();
ArchiveShare(const char *name);
~ArchiveShare();
bool prime(uint64_t *auto_increment);
std::string table_name;
char data_file_name[FN_REFLEN];
uint32_t use_count;
pthread_mutex_t mutex;
drizzled::THR_LOCK lock;
azio_stream archive_write; /* Archive file we are working with */
bool archive_write_open;
bool dirty; /* Flag for if a flush should occur */
bool crashed; /* Meta file is crashed */
uint64_t mean_rec_length;
char real_path[FN_REFLEN];
uint64_t version;
drizzled::ha_rows rows_recorded; /* Number of rows in tables */
drizzled::ha_rows version_rows;
};
/*
Version for file format.
1 - Initial Version (Never Released)
2 - Stream Compression, seperate blobs, no packing
3 - One steam (row and blobs), with packing
*/
#define ARCHIVE_VERSION 3
class ha_archive: public drizzled::Cursor
{
drizzled::THR_LOCK_DATA lock; /* MySQL lock */
ArchiveShare *share; /* Shared lock info */
azio_stream archive; /* Archive file we are working with */
drizzled::internal::my_off_t current_position; /* The position of the row we just read */
unsigned char byte_buffer[IO_SIZE]; /* Initial buffer for our string */
drizzled::String buffer; /* Buffer used for blob storage */
drizzled::ha_rows scan_rows; /* Number of rows left in scan */
bool delayed_insert; /* If the insert is delayed */
bool bulk_insert; /* If we are performing a bulk insert */
const unsigned char *current_key;
uint32_t current_key_len;
uint32_t current_k_offset;
archive_record_buffer *record_buffer;
bool archive_reader_open;
archive_record_buffer *create_record_buffer(unsigned int length);
void destroy_record_buffer(archive_record_buffer *r);
public:
ha_archive(drizzled::plugin::StorageEngine &engine_arg,
drizzled::TableShare &table_arg);
~ha_archive()
{ }
const char *index_type(uint32_t)
{ return "NONE"; }
void get_auto_increment(uint64_t, uint64_t, uint64_t,
uint64_t *first_value, uint64_t *nb_reserved_values);
drizzled::ha_rows records() { return share->rows_recorded; }
int index_init(uint32_t keynr, bool sorted);
virtual int index_read(unsigned char * buf, const unsigned char * key,
uint32_t key_len,
drizzled::ha_rkey_function find_flag);
virtual int index_read_idx(unsigned char * buf, uint32_t index,
const unsigned char * key,
uint32_t key_len,
drizzled::ha_rkey_function find_flag);
int index_next(unsigned char * buf);
int open(const char *name, int mode, uint32_t test_if_locked);
int close(void);
int write_row(unsigned char * buf);
int real_write_row(unsigned char *buf, azio_stream *writer);
int delete_all_rows();
int rnd_init(bool scan=1);
int rnd_next(unsigned char *buf);
int rnd_pos(unsigned char * buf, unsigned char *pos);
ArchiveShare *get_share(const char *table_name, int *rc);
int free_share();
int init_archive_writer();
int init_archive_reader();
void position(const unsigned char *record);
int info(uint);
private:
int get_row(azio_stream *file_to_read, unsigned char *buf);
int get_row_version2(azio_stream *file_to_read, unsigned char *buf);
int get_row_version3(azio_stream *file_to_read, unsigned char *buf);
int read_data_header(azio_stream *file_to_read);
int optimize();
int repair();
public:
void start_bulk_insert(drizzled::ha_rows rows);
int end_bulk_insert();
enum drizzled::row_type get_row_type() const
{
return drizzled::ROW_TYPE_COMPRESSED;
}
drizzled::THR_LOCK_DATA **store_lock(drizzled::Session *session,
drizzled::THR_LOCK_DATA **to,
drizzled::thr_lock_type lock_type);
int check(drizzled::Session* session);
bool check_and_repair(drizzled::Session *session);
uint32_t max_row_length(const unsigned char *buf);
bool fix_rec_buff(unsigned int length);
int unpack_row(azio_stream *file_to_read, unsigned char *record);
unsigned int pack_row(unsigned char *record);
};
#endif /* PLUGIN_ARCHIVE_HA_ARCHIVE_H */
|