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by brian
clean slate |
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/* Copyright (C) 2000-2006 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include "heapdef.h" |
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static int keys_compare(heap_rb_param *param, uchar *key1, uchar *key2); |
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static void init_block(HP_BLOCK *block,uint reclength,ulong min_records, |
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ulong max_records); |
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/* Create a heap table */
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int heap_create(const char *name, uint keys, HP_KEYDEF *keydef, |
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uint reclength, ulong max_records, ulong min_records, |
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HP_CREATE_INFO *create_info, HP_SHARE **res) |
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{
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uint i, j, key_segs, max_length, length; |
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HP_SHARE *share= 0; |
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HA_KEYSEG *keyseg; |
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if (!create_info->internal_table) |
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{
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pthread_mutex_lock(&THR_LOCK_heap); |
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if ((share= hp_find_named_heap(name)) && share->open_count == 0) |
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{
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hp_free(share); |
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share= 0; |
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}
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}
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if (!share) |
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{
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HP_KEYDEF *keyinfo; |
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/*
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We have to store sometimes uchar* del_link in records,
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so the record length should be at least sizeof(uchar*)
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*/
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set_if_bigger(reclength, sizeof (uchar*)); |
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for (i= key_segs= max_length= 0, keyinfo= keydef; i < keys; i++, keyinfo++) |
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{
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bzero((char*) &keyinfo->block,sizeof(keyinfo->block)); |
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bzero((char*) &keyinfo->rb_tree ,sizeof(keyinfo->rb_tree)); |
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for (j= length= 0; j < keyinfo->keysegs; j++) |
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{
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length+= keyinfo->seg[j].length; |
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if (keyinfo->seg[j].null_bit) |
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{
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length++; |
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if (!(keyinfo->flag & HA_NULL_ARE_EQUAL)) |
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keyinfo->flag|= HA_NULL_PART_KEY; |
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if (keyinfo->algorithm == HA_KEY_ALG_BTREE) |
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keyinfo->rb_tree.size_of_element++; |
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}
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switch (keyinfo->seg[j].type) { |
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case HA_KEYTYPE_SHORT_INT: |
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case HA_KEYTYPE_LONG_INT: |
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case HA_KEYTYPE_FLOAT: |
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case HA_KEYTYPE_DOUBLE: |
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case HA_KEYTYPE_USHORT_INT: |
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case HA_KEYTYPE_ULONG_INT: |
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case HA_KEYTYPE_LONGLONG: |
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case HA_KEYTYPE_ULONGLONG: |
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case HA_KEYTYPE_INT24: |
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case HA_KEYTYPE_UINT24: |
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case HA_KEYTYPE_INT8: |
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keyinfo->seg[j].flag|= HA_SWAP_KEY; |
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break; |
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case HA_KEYTYPE_VARBINARY1: |
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/* Case-insensitiveness is handled in coll->hash_sort */
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keyinfo->seg[j].type= HA_KEYTYPE_VARTEXT1; |
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/* fall_through */
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case HA_KEYTYPE_VARTEXT1: |
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keyinfo->flag|= HA_VAR_LENGTH_KEY; |
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length+= 2; |
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/* Save number of bytes used to store length */
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keyinfo->seg[j].bit_start= 1; |
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break; |
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case HA_KEYTYPE_VARBINARY2: |
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/* Case-insensitiveness is handled in coll->hash_sort */
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/* fall_through */
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case HA_KEYTYPE_VARTEXT2: |
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keyinfo->flag|= HA_VAR_LENGTH_KEY; |
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length+= 2; |
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/* Save number of bytes used to store length */
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keyinfo->seg[j].bit_start= 2; |
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/*
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Make future comparison simpler by only having to check for
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one type
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*/
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keyinfo->seg[j].type= HA_KEYTYPE_VARTEXT1; |
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break; |
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default: |
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break; |
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}
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}
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keyinfo->length= length; |
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length+= keyinfo->rb_tree.size_of_element + |
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((keyinfo->algorithm == HA_KEY_ALG_BTREE) ? sizeof(uchar*) : 0); |
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if (length > max_length) |
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max_length= length; |
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key_segs+= keyinfo->keysegs; |
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if (keyinfo->algorithm == HA_KEY_ALG_BTREE) |
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{
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key_segs++; /* additional HA_KEYTYPE_END segment */ |
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if (keyinfo->flag & HA_VAR_LENGTH_KEY) |
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keyinfo->get_key_length= hp_rb_var_key_length; |
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else if (keyinfo->flag & HA_NULL_PART_KEY) |
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keyinfo->get_key_length= hp_rb_null_key_length; |
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else
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keyinfo->get_key_length= hp_rb_key_length; |
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}
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}
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if (!(share= (HP_SHARE*) my_malloc((uint) sizeof(HP_SHARE)+ |
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keys*sizeof(HP_KEYDEF)+ |
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key_segs*sizeof(HA_KEYSEG), |
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MYF(MY_ZEROFILL)))) |
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goto err; |
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share->keydef= (HP_KEYDEF*) (share + 1); |
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share->key_stat_version= 1; |
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keyseg= (HA_KEYSEG*) (share->keydef + keys); |
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init_block(&share->block, reclength + 1, min_records, max_records); |
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/* Fix keys */
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memcpy(share->keydef, keydef, (size_t) (sizeof(keydef[0]) * keys)); |
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for (i= 0, keyinfo= share->keydef; i < keys; i++, keyinfo++) |
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{
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keyinfo->seg= keyseg; |
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memcpy(keyseg, keydef[i].seg, |
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(size_t) (sizeof(keyseg[0]) * keydef[i].keysegs)); |
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keyseg+= keydef[i].keysegs; |
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if (keydef[i].algorithm == HA_KEY_ALG_BTREE) |
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{
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/* additional HA_KEYTYPE_END keyseg */
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keyseg->type= HA_KEYTYPE_END; |
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keyseg->length= sizeof(uchar*); |
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keyseg->flag= 0; |
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keyseg->null_bit= 0; |
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keyseg++; |
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init_tree(&keyinfo->rb_tree, 0, 0, sizeof(uchar*), |
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(qsort_cmp2)keys_compare, 1, NULL, NULL); |
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keyinfo->delete_key= hp_rb_delete_key; |
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keyinfo->write_key= hp_rb_write_key; |
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}
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else
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{
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init_block(&keyinfo->block, sizeof(HASH_INFO), min_records, |
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max_records); |
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keyinfo->delete_key= hp_delete_key; |
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keyinfo->write_key= hp_write_key; |
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keyinfo->hash_buckets= 0; |
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}
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if ((keyinfo->flag & HA_AUTO_KEY) && create_info->with_auto_increment) |
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share->auto_key= i + 1; |
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}
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share->min_records= min_records; |
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share->max_records= max_records; |
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share->max_table_size= create_info->max_table_size; |
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share->data_length= share->index_length= 0; |
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share->reclength= reclength; |
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share->blength= 1; |
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share->keys= keys; |
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share->max_key_length= max_length; |
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share->changed= 0; |
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share->auto_key= create_info->auto_key; |
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share->auto_key_type= create_info->auto_key_type; |
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share->auto_increment= create_info->auto_increment; |
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/* Must be allocated separately for rename to work */
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if (!(share->name= my_strdup(name,MYF(0)))) |
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{
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my_free((uchar*) share,MYF(0)); |
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goto err; |
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}
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thr_lock_init(&share->lock); |
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VOID(pthread_mutex_init(&share->intern_lock,MY_MUTEX_INIT_FAST)); |
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if (!create_info->internal_table) |
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{
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share->open_list.data= (void*) share; |
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heap_share_list= list_add(heap_share_list,&share->open_list); |
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}
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else
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share->delete_on_close= 1; |
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}
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if (!create_info->internal_table) |
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pthread_mutex_unlock(&THR_LOCK_heap); |
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*res= share; |
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51.3.1
by Jay Pipes
Removed all DBUG symbols from heap storage engine |
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return(0); |
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1
by brian
clean slate |
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err: |
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if (!create_info->internal_table) |
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pthread_mutex_unlock(&THR_LOCK_heap); |
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51.3.1
by Jay Pipes
Removed all DBUG symbols from heap storage engine |
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return(1); |
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1
by brian
clean slate |
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} /* heap_create */ |
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static int keys_compare(heap_rb_param *param, uchar *key1, uchar *key2) |
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{
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uint not_used[2]; |
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return ha_key_cmp(param->keyseg, key1, key2, param->key_length, |
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param->search_flag, not_used); |
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}
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static void init_block(HP_BLOCK *block, uint reclength, ulong min_records, |
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ulong max_records) |
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{
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uint i,recbuffer,records_in_block; |
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max_records= max(min_records,max_records); |
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if (!max_records) |
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max_records= 1000; /* As good as quess as anything */ |
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recbuffer= (uint) (reclength + sizeof(uchar**) - 1) & ~(sizeof(uchar**) - 1); |
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records_in_block= max_records / 10; |
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if (records_in_block < 10 && max_records) |
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records_in_block= 10; |
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if (!records_in_block || records_in_block*recbuffer > |
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(my_default_record_cache_size-sizeof(HP_PTRS)*HP_MAX_LEVELS)) |
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records_in_block= (my_default_record_cache_size - sizeof(HP_PTRS) * |
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HP_MAX_LEVELS) / recbuffer + 1; |
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block->records_in_block= records_in_block; |
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block->recbuffer= recbuffer; |
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block->last_allocated= 0L; |
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for (i= 0; i <= HP_MAX_LEVELS; i++) |
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block->level_info[i].records_under_level= |
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(!i ? 1 : i == 1 ? records_in_block : |
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HP_PTRS_IN_NOD * block->level_info[i - 1].records_under_level); |
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}
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static inline void heap_try_free(HP_SHARE *share) |
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{
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if (share->open_count == 0) |
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hp_free(share); |
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else
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share->delete_on_close= 1; |
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}
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int heap_delete_table(const char *name) |
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{
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int result; |
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register HP_SHARE *share; |
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pthread_mutex_lock(&THR_LOCK_heap); |
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if ((share= hp_find_named_heap(name))) |
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{
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heap_try_free(share); |
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result= 0; |
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}
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else
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{
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result= my_errno=ENOENT; |
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}
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pthread_mutex_unlock(&THR_LOCK_heap); |
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51.3.1
by Jay Pipes
Removed all DBUG symbols from heap storage engine |
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return(result); |
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1
by brian
clean slate |
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}
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void heap_drop_table(HP_INFO *info) |
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{
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pthread_mutex_lock(&THR_LOCK_heap); |
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heap_try_free(info->s); |
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pthread_mutex_unlock(&THR_LOCK_heap); |
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51.3.1
by Jay Pipes
Removed all DBUG symbols from heap storage engine |
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return; |
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1
by brian
clean slate |
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}
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void hp_free(HP_SHARE *share) |
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{
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if (share->open_list.data) /* If not internal table */ |
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heap_share_list= list_delete(heap_share_list, &share->open_list); |
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hp_clear(share); /* Remove blocks from memory */ |
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thr_lock_delete(&share->lock); |
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VOID(pthread_mutex_destroy(&share->intern_lock)); |
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my_free((uchar*) share->name, MYF(0)); |
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my_free((uchar*) share, MYF(0)); |
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return; |
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}
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