mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 20:12:31 +01:00
107 lines
4 KiB
C
107 lines
4 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
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 */
|
|
|
|
/* This file is included in all heap-files */
|
|
|
|
#include <my_base.h> /* This includes global */
|
|
#ifdef THREAD
|
|
#include <my_pthread.h>
|
|
#endif
|
|
#include "heap.h" /* Structs & some defines */
|
|
#include "my_tree.h"
|
|
|
|
/*
|
|
When allocating keys /rows in the internal block structure, do it
|
|
within the following boundaries.
|
|
|
|
The challenge is to find the balance between allocate as few blocks
|
|
as possible and keep memory consumption down.
|
|
*/
|
|
|
|
#define HP_MIN_RECORDS_IN_BLOCK 16
|
|
#define HP_MAX_RECORDS_IN_BLOCK 8192
|
|
|
|
/* Some extern variables */
|
|
|
|
extern LIST *heap_open_list,*heap_share_list;
|
|
|
|
#define test_active(info) \
|
|
if (!(info->update & HA_STATE_AKTIV))\
|
|
{ my_errno=HA_ERR_NO_ACTIVE_RECORD; DBUG_RETURN(-1); }
|
|
#define hp_find_hash(A,B) ((HASH_INFO*) hp_find_block((A),(B)))
|
|
|
|
/* Find pos for record and update it in info->current_ptr */
|
|
#define hp_find_record(info,pos) (info)->current_ptr= hp_find_block(&(info)->s->block,pos)
|
|
|
|
typedef struct st_hp_hash_info
|
|
{
|
|
struct st_hp_hash_info *next_key;
|
|
byte *ptr_to_rec;
|
|
} HASH_INFO;
|
|
|
|
typedef struct {
|
|
HA_KEYSEG *keyseg;
|
|
uint key_length;
|
|
uint search_flag;
|
|
} heap_rb_param;
|
|
|
|
/* Prototypes for intern functions */
|
|
|
|
extern HP_SHARE *hp_find_named_heap(const char *name);
|
|
extern int hp_rectest(HP_INFO *info,const byte *old);
|
|
extern byte *hp_find_block(HP_BLOCK *info,ulong pos);
|
|
extern int hp_get_new_block(HP_BLOCK *info, ulong* alloc_length);
|
|
extern void hp_free(HP_SHARE *info);
|
|
extern byte *hp_free_level(HP_BLOCK *block,uint level,HP_PTRS *pos,
|
|
byte *last_pos);
|
|
extern int hp_write_key(HP_INFO *info, HP_KEYDEF *keyinfo,
|
|
const byte *record, byte *recpos);
|
|
extern int hp_rb_write_key(HP_INFO *info, HP_KEYDEF *keyinfo,
|
|
const byte *record, byte *recpos);
|
|
extern int hp_rb_delete_key(HP_INFO *info,HP_KEYDEF *keyinfo,
|
|
const byte *record,byte *recpos,int flag);
|
|
extern int hp_delete_key(HP_INFO *info,HP_KEYDEF *keyinfo,
|
|
const byte *record,byte *recpos,int flag);
|
|
extern HASH_INFO *_heap_find_hash(HP_BLOCK *block,ulong pos);
|
|
extern byte *hp_search(HP_INFO *info,HP_KEYDEF *keyinfo,const byte *key,
|
|
uint nextflag);
|
|
extern byte *hp_search_next(HP_INFO *info, HP_KEYDEF *keyinfo,
|
|
const byte *key, HASH_INFO *pos);
|
|
extern ulong hp_hashnr(HP_KEYDEF *keyinfo,const byte *key);
|
|
extern ulong hp_rec_hashnr(HP_KEYDEF *keyinfo,const byte *rec);
|
|
extern ulong hp_mask(ulong hashnr,ulong buffmax,ulong maxlength);
|
|
extern void hp_movelink(HASH_INFO *pos,HASH_INFO *next_link,
|
|
HASH_INFO *newlink);
|
|
extern int hp_rec_key_cmp(HP_KEYDEF *keydef,const byte *rec1,
|
|
const byte *rec2);
|
|
extern int hp_key_cmp(HP_KEYDEF *keydef,const byte *rec,
|
|
const byte *key);
|
|
extern void hp_make_key(HP_KEYDEF *keydef,byte *key,const byte *rec);
|
|
extern uint hp_rb_make_key(HP_KEYDEF *keydef, byte *key,
|
|
const byte *rec, byte *recpos);
|
|
extern uint hp_rb_key_length(HP_KEYDEF *keydef, const byte *key);
|
|
extern uint hp_rb_null_key_length(HP_KEYDEF *keydef, const byte *key);
|
|
extern my_bool hp_if_null_in_key(HP_KEYDEF *keyinfo, const byte *record);
|
|
extern int hp_close(register HP_INFO *info);
|
|
extern void hp_clear(HP_SHARE *info);
|
|
extern uint hp_rb_pack_key(HP_KEYDEF *keydef, uchar *key, const uchar *old,
|
|
uint k_len);
|
|
#ifdef THREAD
|
|
extern pthread_mutex_t THR_LOCK_heap;
|
|
#else
|
|
#define pthread_mutex_lock(A)
|
|
#define pthread_mutex_unlock(A)
|
|
#endif
|