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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
|
/* Copyright (C) 2000-2006 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 */
#include "heapdef.h"
static int keys_compare(heap_rb_param *param, uchar *key1, uchar *key2);
static void init_block(HP_BLOCK *block,uint reclength,ulong min_records,
ulong max_records);
/* Create a heap table */
int heap_create(const char *name, uint keys, HP_KEYDEF *keydef,
uint reclength, ulong max_records, ulong min_records,
HP_CREATE_INFO *create_info, HP_SHARE **res)
{
uint i, j, key_segs, max_length, length;
HP_SHARE *share= 0;
HA_KEYSEG *keyseg;
DBUG_ENTER("heap_create");
if (!create_info->internal_table)
{
pthread_mutex_lock(&THR_LOCK_heap);
if ((share= hp_find_named_heap(name)) && share->open_count == 0)
{
hp_free(share);
share= 0;
}
}
if (!share)
{
HP_KEYDEF *keyinfo;
DBUG_PRINT("info",("Initializing new table"));
/*
We have to store sometimes uchar* del_link in records,
so the record length should be at least sizeof(uchar*)
*/
set_if_bigger(reclength, sizeof (uchar*));
for (i= key_segs= max_length= 0, keyinfo= keydef; i < keys; i++, keyinfo++)
{
bzero((char*) &keyinfo->block,sizeof(keyinfo->block));
bzero((char*) &keyinfo->rb_tree ,sizeof(keyinfo->rb_tree));
for (j= length= 0; j < keyinfo->keysegs; j++)
{
length+= keyinfo->seg[j].length;
if (keyinfo->seg[j].null_bit)
{
length++;
if (!(keyinfo->flag & HA_NULL_ARE_EQUAL))
keyinfo->flag|= HA_NULL_PART_KEY;
if (keyinfo->algorithm == HA_KEY_ALG_BTREE)
keyinfo->rb_tree.size_of_element++;
}
switch (keyinfo->seg[j].type) {
case HA_KEYTYPE_SHORT_INT:
case HA_KEYTYPE_LONG_INT:
case HA_KEYTYPE_FLOAT:
case HA_KEYTYPE_DOUBLE:
case HA_KEYTYPE_USHORT_INT:
case HA_KEYTYPE_ULONG_INT:
case HA_KEYTYPE_LONGLONG:
case HA_KEYTYPE_ULONGLONG:
case HA_KEYTYPE_INT24:
case HA_KEYTYPE_UINT24:
case HA_KEYTYPE_INT8:
keyinfo->seg[j].flag|= HA_SWAP_KEY;
break;
case HA_KEYTYPE_VARBINARY1:
/* Case-insensitiveness is handled in coll->hash_sort */
keyinfo->seg[j].type= HA_KEYTYPE_VARTEXT1;
/* fall_through */
case HA_KEYTYPE_VARTEXT1:
if (!my_binary_compare(keyinfo->seg[j].charset))
keyinfo->flag|= HA_END_SPACE_KEY;
keyinfo->flag|= HA_VAR_LENGTH_KEY;
length+= 2;
/* Save number of bytes used to store length */
keyinfo->seg[j].bit_start= 1;
break;
case HA_KEYTYPE_VARBINARY2:
/* Case-insensitiveness is handled in coll->hash_sort */
/* fall_through */
case HA_KEYTYPE_VARTEXT2:
if (!my_binary_compare(keyinfo->seg[j].charset))
keyinfo->flag|= HA_END_SPACE_KEY;
keyinfo->flag|= HA_VAR_LENGTH_KEY;
length+= 2;
/* Save number of bytes used to store length */
keyinfo->seg[j].bit_start= 2;
/*
Make future comparison simpler by only having to check for
one type
*/
keyinfo->seg[j].type= HA_KEYTYPE_VARTEXT1;
break;
default:
break;
}
if (keyinfo->seg[j].flag & HA_END_SPACE_ARE_EQUAL)
keyinfo->flag|= HA_END_SPACE_KEY;
}
keyinfo->length= length;
length+= keyinfo->rb_tree.size_of_element +
((keyinfo->algorithm == HA_KEY_ALG_BTREE) ? sizeof(uchar*) : 0);
if (length > max_length)
max_length= length;
key_segs+= keyinfo->keysegs;
if (keyinfo->algorithm == HA_KEY_ALG_BTREE)
{
key_segs++; /* additional HA_KEYTYPE_END segment */
if (keyinfo->flag & HA_VAR_LENGTH_KEY)
keyinfo->get_key_length= hp_rb_var_key_length;
else if (keyinfo->flag & HA_NULL_PART_KEY)
keyinfo->get_key_length= hp_rb_null_key_length;
else
keyinfo->get_key_length= hp_rb_key_length;
}
}
if (!(share= (HP_SHARE*) my_malloc((uint) sizeof(HP_SHARE)+
keys*sizeof(HP_KEYDEF)+
key_segs*sizeof(HA_KEYSEG),
MYF(MY_ZEROFILL))))
goto err;
share->keydef= (HP_KEYDEF*) (share + 1);
share->key_stat_version= 1;
keyseg= (HA_KEYSEG*) (share->keydef + keys);
init_block(&share->block, reclength + 1, min_records, max_records);
/* Fix keys */
memcpy(share->keydef, keydef, (size_t) (sizeof(keydef[0]) * keys));
for (i= 0, keyinfo= share->keydef; i < keys; i++, keyinfo++)
{
keyinfo->seg= keyseg;
memcpy(keyseg, keydef[i].seg,
(size_t) (sizeof(keyseg[0]) * keydef[i].keysegs));
keyseg+= keydef[i].keysegs;
if (keydef[i].algorithm == HA_KEY_ALG_BTREE)
{
/* additional HA_KEYTYPE_END keyseg */
keyseg->type= HA_KEYTYPE_END;
keyseg->length= sizeof(uchar*);
keyseg->flag= 0;
keyseg->null_bit= 0;
keyseg++;
init_tree(&keyinfo->rb_tree, 0, 0, sizeof(uchar*),
(qsort_cmp2)keys_compare, 1, NULL, NULL);
keyinfo->delete_key= hp_rb_delete_key;
keyinfo->write_key= hp_rb_write_key;
}
else
{
init_block(&keyinfo->block, sizeof(HASH_INFO), min_records,
max_records);
keyinfo->delete_key= hp_delete_key;
keyinfo->write_key= hp_write_key;
keyinfo->hash_buckets= 0;
}
if ((keyinfo->flag & HA_AUTO_KEY) && create_info->with_auto_increment)
share->auto_key= i + 1;
}
share->min_records= min_records;
share->max_records= max_records;
share->max_table_size= create_info->max_table_size;
share->data_length= share->index_length= 0;
share->reclength= reclength;
share->blength= 1;
share->keys= keys;
share->max_key_length= max_length;
share->changed= 0;
share->auto_key= create_info->auto_key;
share->auto_key_type= create_info->auto_key_type;
share->auto_increment= create_info->auto_increment;
/* Must be allocated separately for rename to work */
if (!(share->name= my_strdup(name,MYF(0))))
{
my_free((uchar*) share,MYF(0));
goto err;
}
#ifdef THREAD
thr_lock_init(&share->lock);
VOID(pthread_mutex_init(&share->intern_lock,MY_MUTEX_INIT_FAST));
#endif
if (!create_info->internal_table)
{
share->open_list.data= (void*) share;
heap_share_list= list_add(heap_share_list,&share->open_list);
}
else
share->delete_on_close= 1;
}
if (!create_info->internal_table)
pthread_mutex_unlock(&THR_LOCK_heap);
*res= share;
DBUG_RETURN(0);
err:
if (!create_info->internal_table)
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(1);
} /* heap_create */
static int keys_compare(heap_rb_param *param, uchar *key1, uchar *key2)
{
uint not_used[2];
return ha_key_cmp(param->keyseg, key1, key2, param->key_length,
param->search_flag, not_used);
}
static void init_block(HP_BLOCK *block, uint reclength, ulong min_records,
ulong max_records)
{
uint i,recbuffer,records_in_block;
max_records= max(min_records,max_records);
if (!max_records)
max_records= 1000; /* As good as quess as anything */
recbuffer= (uint) (reclength + sizeof(uchar**) - 1) & ~(sizeof(uchar**) - 1);
records_in_block= max_records / 10;
if (records_in_block < 10 && max_records)
records_in_block= 10;
if (!records_in_block || records_in_block*recbuffer >
(my_default_record_cache_size-sizeof(HP_PTRS)*HP_MAX_LEVELS))
records_in_block= (my_default_record_cache_size - sizeof(HP_PTRS) *
HP_MAX_LEVELS) / recbuffer + 1;
block->records_in_block= records_in_block;
block->recbuffer= recbuffer;
block->last_allocated= 0L;
for (i= 0; i <= HP_MAX_LEVELS; i++)
block->level_info[i].records_under_level=
(!i ? 1 : i == 1 ? records_in_block :
HP_PTRS_IN_NOD * block->level_info[i - 1].records_under_level);
}
static inline void heap_try_free(HP_SHARE *share)
{
if (share->open_count == 0)
hp_free(share);
else
share->delete_on_close= 1;
}
int heap_delete_table(const char *name)
{
int result;
register HP_SHARE *share;
DBUG_ENTER("heap_delete_table");
pthread_mutex_lock(&THR_LOCK_heap);
if ((share= hp_find_named_heap(name)))
{
heap_try_free(share);
result= 0;
}
else
{
result= my_errno=ENOENT;
}
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(result);
}
void heap_drop_table(HP_INFO *info)
{
DBUG_ENTER("heap_drop_table");
pthread_mutex_lock(&THR_LOCK_heap);
heap_try_free(info->s);
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_VOID_RETURN;
}
void hp_free(HP_SHARE *share)
{
if (share->open_list.data) /* If not internal table */
heap_share_list= list_delete(heap_share_list, &share->open_list);
hp_clear(share); /* Remove blocks from memory */
#ifdef THREAD
thr_lock_delete(&share->lock);
VOID(pthread_mutex_destroy(&share->intern_lock));
#endif
my_free((uchar*) share->name, MYF(0));
my_free((uchar*) share, MYF(0));
return;
}
|