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
|
/* Copyright (C) 2000-2004, 2006 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 */
/* open a heap-database */
#include "heapdef.h"
#ifdef VMS
#include "hp_static.c" /* Stupid vms-linker */
#endif
#include "my_sys.h"
/*
Open heap table based on HP_SHARE structure
NOTE
This doesn't register the table in the open table list.
*/
HP_INFO *heap_open_from_share(HP_SHARE *share, int mode)
{
HP_INFO *info;
DBUG_ENTER("heap_open_from_share");
if (!(info= (HP_INFO*) my_malloc((uint) sizeof(HP_INFO) +
2 * share->max_key_length,
MYF(MY_ZEROFILL))))
{
DBUG_RETURN(0);
}
share->open_count++;
#ifdef THREAD
thr_lock_data_init(&share->lock,&info->lock,NULL);
#endif
info->s= share;
info->lastkey= (uchar*) (info + 1);
info->recbuf= (uchar*) (info->lastkey + share->max_key_length);
info->mode= mode;
info->current_record= (ulong) ~0L; /* No current record */
info->lastinx= info->errkey= -1;
#ifndef DBUG_OFF
info->opt_flag= READ_CHECK_USED; /* Check when changing */
#endif
DBUG_PRINT("exit",("heap: 0x%lx reclength: %d records_in_block: %d",
(long) info, share->reclength,
share->block.records_in_block));
DBUG_RETURN(info);
}
/*
Open heap table based on HP_SHARE structure and register it
*/
HP_INFO *heap_open_from_share_and_register(HP_SHARE *share, int mode)
{
HP_INFO *info;
DBUG_ENTER("heap_open_from_share_and_register");
pthread_mutex_lock(&THR_LOCK_heap);
if ((info= heap_open_from_share(share, mode)))
{
info->open_list.data= (void*) info;
heap_open_list= list_add(heap_open_list,&info->open_list);
}
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(info);
}
/*
Open heap table based on name
NOTE
This register the table in the open table list. so that it can be
found by future heap_open() calls.
*/
HP_INFO *heap_open(const char *name, int mode)
{
HP_INFO *info;
HP_SHARE *share;
DBUG_ENTER("heap_open");
pthread_mutex_lock(&THR_LOCK_heap);
if (!(share= hp_find_named_heap(name)))
{
my_errno= ENOENT;
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(0);
}
if ((info= heap_open_from_share(share, mode)))
{
info->open_list.data= (void*) info;
heap_open_list= list_add(heap_open_list,&info->open_list);
}
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(info);
}
/* map name to a heap-nr. If name isn't found return 0 */
HP_SHARE *hp_find_named_heap(const char *name)
{
LIST *pos;
HP_SHARE *info;
DBUG_ENTER("heap_find");
DBUG_PRINT("enter",("name: %s",name));
for (pos= heap_share_list; pos; pos= pos->next)
{
info= (HP_SHARE*) pos->data;
if (!strcmp(name, info->name))
{
DBUG_PRINT("exit", ("Old heap_database: 0x%lx", (long) info));
DBUG_RETURN(info);
}
}
DBUG_RETURN((HP_SHARE *) 0);
}
|