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/* Copyright (C) 2000-2002, 2004 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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/* This file is included in all heap-files */
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#ifndef PLUGIN_HEAP_HEAP_PRIV_H
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#define PLUGIN_HEAP_HEAP_PRIV_H
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#include <drizzled/base.h>
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#include "drizzled/internal/my_sys.h"
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#include "drizzled/charset_info.h"
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#include "drizzled/internal/my_pthread.h"
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#include "heap.h" /* Structs & some defines */
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#include "drizzled/my_tree.h"
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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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#define CHUNK_STATUS_DELETED 0 /* this chunk has been deleted and can be reused */
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#define CHUNK_STATUS_ACTIVE 1 /* this chunk represents the first part of a live record */
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#define CHUNK_STATUS_LINKED 2 /* this chunk is a continuation from another chunk (part of chunkset) */
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/* Some extern variables */
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extern std::list<HP_SHARE *> heap_share_list;
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extern std::list<HP_INFO *> heap_open_list;
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#define test_active(info) \
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if (!(info->update & HA_STATE_AKTIV))\
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{ errno=HA_ERR_NO_ACTIVE_RECORD; return(-1); }
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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) (info)->current_ptr= hp_find_block(&(info)->s->recordspace.block,pos)
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#define get_chunk_status(info,ptr) (ptr[(info)->offset_status])
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#define get_chunk_count(info,rec_length) ((rec_length + (info)->chunk_dataspace_length - 1) / (info)->chunk_dataspace_length)
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typedef struct st_hp_hash_info
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struct st_hp_hash_info *next_key;
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unsigned char *ptr_to_rec;
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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 unsigned char *old);
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extern unsigned char *hp_find_block(HP_BLOCK *info,uint32_t 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 unsigned char *hp_free_level(HP_BLOCK *block,uint32_t level,HP_PTRS *pos,
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unsigned char *last_pos);
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extern int hp_write_key(HP_INFO *info, HP_KEYDEF *keyinfo,
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const unsigned char *record, unsigned char *recpos);
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extern int hp_rb_write_key(HP_INFO *info, HP_KEYDEF *keyinfo,
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const unsigned char *record, unsigned char *recpos);
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extern int hp_rb_delete_key(HP_INFO *info,HP_KEYDEF *keyinfo,
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const unsigned char *record,unsigned char *recpos,int flag);
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extern int hp_delete_key(HP_INFO *info,HP_KEYDEF *keyinfo,
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const unsigned char *record,unsigned char *recpos,int flag);
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extern HASH_INFO *_heap_find_hash(HP_BLOCK *block,uint32_t pos);
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extern unsigned char *hp_search(HP_INFO *info,HP_KEYDEF *keyinfo,const unsigned char *key,
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extern unsigned char *hp_search_next(HP_INFO *info, HP_KEYDEF *keyinfo,
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const unsigned char *key, HASH_INFO *pos);
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extern uint32_t hp_rec_hashnr(HP_KEYDEF *keyinfo,const unsigned char *rec);
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extern uint32_t hp_mask(uint32_t hashnr,uint32_t buffmax,uint32_t maxlength);
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extern void hp_movelink(HASH_INFO *pos,HASH_INFO *next_link,
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extern int hp_rec_key_cmp(HP_KEYDEF *keydef,const unsigned char *rec1,
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const unsigned char *rec2,
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bool diff_if_only_endspace_difference);
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extern void hp_make_key(HP_KEYDEF *keydef,unsigned char *key,const unsigned char *rec);
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extern uint32_t hp_rb_make_key(HP_KEYDEF *keydef, unsigned char *key,
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const unsigned char *rec, unsigned char *recpos);
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extern uint32_t hp_rb_key_length(HP_KEYDEF *keydef, const unsigned char *key);
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extern uint32_t hp_rb_null_key_length(HP_KEYDEF *keydef, const unsigned char *key);
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extern uint32_t hp_rb_var_key_length(HP_KEYDEF *keydef, const unsigned char *key);
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extern bool hp_if_null_in_key(HP_KEYDEF *keyinfo, const unsigned char *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 uint32_t hp_rb_pack_key(HP_KEYDEF *keydef,
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unsigned char *key, const unsigned char *old,
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drizzled::key_part_map keypart_map);
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/* Chunkset management (alloc/free/encode/decode) functions */
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extern unsigned char *hp_allocate_chunkset(HP_DATASPACE *info, uint32_t chunk_count);
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extern int hp_reallocate_chunkset(HP_DATASPACE *info, uint32_t chunk_count, unsigned char* pos);
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extern void hp_free_chunks(HP_DATASPACE *info, unsigned char *pos);
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extern void hp_clear_dataspace(HP_DATASPACE *info);
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extern uint32_t hp_get_encoded_data_length(HP_SHARE *info, const unsigned char *record, uint32_t *chunk_count);
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extern void hp_copy_record_data_to_chunkset(HP_SHARE *info, const unsigned char *record, unsigned char *pos);
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extern void hp_extract_record(HP_SHARE *info, unsigned char *record, const unsigned char *pos);
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extern uint32_t hp_process_record_data_to_chunkset(HP_SHARE *info, const unsigned char *record, unsigned char *pos, uint32_t is_compare);
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extern pthread_mutex_t THR_LOCK_heap;
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#endif /* PLUGIN_HEAP_HEAP_PRIV_H */