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heap_create() <-> heap_open()

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unknown
2002-06-07 16:47:36 +05:00
parent fa86b94837
commit 6192996d17
6 changed files with 265 additions and 265 deletions
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166
heap/hp_create.c
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@ -14,29 +14,156 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
Create is done by simply remove the database from memory if it exists.
Open creates the database when neaded
*/
#include "heapdef.h"
int heap_create(const char *name)
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);
int heap_create(const char *name, uint keys, HP_KEYDEF *keydef,
uint reclength, ulong max_records, ulong min_records)
{
reg1 HP_SHARE *share;
uint i, j, key_segs, max_length, length;
HP_SHARE *share;
HA_KEYSEG *keyseg;
DBUG_ENTER("heap_create");
pthread_mutex_lock(&THR_LOCK_heap);
if ((share=hp_find_named_heap(name)))
if ((share= hp_find_named_heap(name)) && share->open_count == 0)
{
if (share->open_count == 0)
hp_free(share);
hp_free(share);
share= NULL;
}
else
if (!share)
{
my_errno=ENOENT;
HP_KEYDEF *keyinfo;
DBUG_PRINT("info",("Initializing new table"));
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)
{
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++;
}
}
keyinfo->length= length;
length+= keyinfo->rb_tree.size_of_element +
((keyinfo->algorithm == HA_KEY_ALG_BTREE) ? sizeof(byte*) : 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_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))))
{
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(1);
}
share->keydef= (HP_KEYDEF*) (share + 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++)
{
uint nsegs= keydef[i].keysegs;
if (keydef[i].algorithm == HA_KEY_ALG_BTREE)
{
init_tree(&keyinfo->rb_tree, 0, 0, sizeof(byte*),
(qsort_cmp2)keys_compare, 1, NULL, NULL);
keyinfo->delete_key= hp_rb_delete_key;
keyinfo->write_key= hp_rb_write_key;
nsegs++;
}
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->seg= keyseg;
memcpy(keyseg, keydef[i].seg,
(size_t) (sizeof(keyseg[0]) * nsegs));
keyseg+= nsegs;
}
share->min_records= min_records;
share->max_records= max_records;
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;
if (!(share->name= my_strdup(name,MYF(0))))
{
my_free((gptr) share,MYF(0));
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(1);
}
#ifdef THREAD
thr_lock_init(&share->lock);
VOID(pthread_mutex_init(&share->intern_lock,MY_MUTEX_INIT_FAST));
#endif
share->open_list.data= (void*) share;
heap_share_list= list_add(heap_share_list,&share->open_list);
}
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(0);
} /* heap_create */
static int keys_compare(heap_rb_param *param, uchar *key1, uchar *key2)
{
uint not_used;
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(byte**) - 1) & ~(sizeof(byte**) - 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);
}
int heap_delete_table(const char *name)
@ -46,32 +173,31 @@ int heap_delete_table(const char *name)
DBUG_ENTER("heap_delete_table");
pthread_mutex_lock(&THR_LOCK_heap);
if ((share = hp_find_named_heap(name)))
if ((share= hp_find_named_heap(name)))
{
if (share->open_count == 0)
hp_free(share);
else
share->delete_on_close=1;
result=0;
share->delete_on_close= 1;
result= 0;
}
else
{
result=my_errno=ENOENT;
result= my_errno=ENOENT;
}
pthread_mutex_unlock(&THR_LOCK_heap);
DBUG_RETURN(result);
}
void hp_free(HP_SHARE *share)
{
heap_share_list=list_delete(heap_share_list,&share->open_list);
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((gptr) share->name,MYF(0));
my_free((gptr) share,MYF(0));
my_free((gptr) share->name, MYF(0));
my_free((gptr) share, MYF(0));
return;
}