125 lines
5.1 KiB
C
125 lines
5.1 KiB
C
/* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
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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, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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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, version 2.0, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/* This file is included in all heap-files */
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#include "heap.h" /* Structs & some defines */
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#include "m_string.h"
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#include "my_base.h" /* This includes global */
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#include "my_sys.h"
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#include "my_thread.h"
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#include "my_thread_local.h"
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#include "my_tree.h"
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/*
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When allocating keys /rows in the internal block structure, do it
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within the following boundaries.
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The challenge is to find the balance between allocate as few blocks
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as possible and keep memory consumption down.
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*/
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#define HP_MIN_RECORDS_IN_BLOCK 16
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#define HP_MAX_RECORDS_IN_BLOCK 8192
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/* Some extern variables */
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extern LIST *heap_open_list, *heap_share_list;
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#define test_active(info) \
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if (!(info->update & HA_STATE_AKTIV)) { \
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set_my_errno(HA_ERR_NO_ACTIVE_RECORD); \
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return -1; \
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}
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#define hp_find_hash(A, B) ((HASH_INFO *)hp_find_block((A), (B)))
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/* Find pos for record and update it in info->current_ptr */
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#define hp_find_record(info, pos) \
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(info)->current_ptr = hp_find_block(&(info)->s->block, pos)
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struct HASH_INFO {
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HASH_INFO *next_key;
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uchar *ptr_to_rec;
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ulong hash; /* Cached key hash value. */
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};
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typedef struct {
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HA_KEYSEG *keyseg;
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uint key_length;
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uint search_flag;
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} heap_rb_param;
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/* Prototypes for intern functions */
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extern HP_SHARE *hp_find_named_heap(const char *name);
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extern int hp_rectest(HP_INFO *info, const uchar *old);
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extern uchar *hp_find_block(HP_BLOCK *info, ulong pos);
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extern int hp_get_new_block(HP_BLOCK *info, size_t *alloc_length);
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extern void hp_free(HP_SHARE *info);
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extern uchar *hp_free_level(HP_BLOCK *block, uint level, HP_PTRS *pos,
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uchar *last_pos);
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extern int hp_write_key(HP_INFO *info, HP_KEYDEF *keyinfo, const uchar *record,
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uchar *recpos);
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extern int hp_rb_write_key(HP_INFO *info, HP_KEYDEF *keyinfo,
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const uchar *record, uchar *recpos);
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extern int hp_rb_delete_key(HP_INFO *info, HP_KEYDEF *keyinfo,
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const uchar *record, uchar *recpos, int flag);
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extern int hp_delete_key(HP_INFO *info, HP_KEYDEF *keyinfo, const uchar *record,
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uchar *recpos, int flag);
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extern HASH_INFO *_heap_find_hash(HP_BLOCK *block, ulong pos);
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extern uchar *hp_search(HP_INFO *info, HP_KEYDEF *keyinfo, const uchar *key,
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uint nextflag);
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extern uchar *hp_search_next(HP_INFO *info, HP_KEYDEF *keyinfo,
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const uchar *key, HASH_INFO *pos);
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extern uint64 hp_hashnr(HP_KEYDEF *keyinfo, const uchar *key);
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extern uint64 hp_rec_hashnr(HP_KEYDEF *keyinfo, const uchar *rec);
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extern uint64 hp_mask(uint64 hashnr, uint64 buffmax, uint64 maxlength);
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extern void hp_movelink(HASH_INFO *pos, HASH_INFO *next_link,
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HASH_INFO *newlink);
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extern int hp_rec_key_cmp(HP_KEYDEF *keydef, const uchar *rec1,
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const uchar *rec2);
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extern int hp_key_cmp(HP_KEYDEF *keydef, const uchar *rec, const uchar *key);
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extern void hp_make_key(HP_KEYDEF *keydef, uchar *key, const uchar *rec);
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extern uint hp_rb_make_key(HP_KEYDEF *keydef, uchar *key, const uchar *rec,
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uchar *recpos);
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extern uint hp_rb_key_length(HP_KEYDEF *keydef, const uchar *key);
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extern uint hp_rb_null_key_length(HP_KEYDEF *keydef, const uchar *key);
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extern uint hp_rb_var_key_length(HP_KEYDEF *keydef, const uchar *key);
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extern bool hp_if_null_in_key(HP_KEYDEF *keyinfo, const uchar *record);
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extern int hp_close(HP_INFO *info);
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extern void hp_clear(HP_SHARE *info);
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extern void hp_clear_keys(HP_SHARE *info);
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extern uint hp_rb_pack_key(const HP_KEYDEF *keydef, uchar *key,
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const uchar *old, key_part_map keypart_map);
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extern mysql_mutex_t THR_LOCK_heap;
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extern PSI_memory_key hp_key_memory_HP_SHARE;
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extern PSI_memory_key hp_key_memory_HP_INFO;
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extern PSI_memory_key hp_key_memory_HP_PTRS;
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extern PSI_memory_key hp_key_memory_HP_KEYDEF;
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#ifdef HAVE_PSI_INTERFACE
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void init_heap_psi_keys();
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#endif /* HAVE_PSI_INTERFACE */
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