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btr0pcur.h
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btr0pcur.h
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#ifndef __btr0pcur_h_
#define __btr0pcur_h_
#include "univ.h"
#include "dict0dict.h"
#include "data0data.h"
#include "mtr0mtr.h"
#include "page0cur.h"
#include "btr0cur.h"
#include "btr0btr.h"
#include "btr0types.h"
#define BTR_PCUR_ON 1
#define BTR_PCUR_BEFORE 2
#define BTR_PCUR_AFTER 3
#define BTR_PCUR_BEFORE_FIRST_IN_TREE 4
#define BTR_PCUR_AFTER_LAST_IN_TREE 5
/*pcursor->pos_state value*/
#define BTR_PCUR_IS_POSITIONED 1997660512
#define BTR_PCUR_WAS_POSITIONED 1187549791
#define BTR_PCUR_NOT_POSITIONED 1328997689
/*pcursor->old_stored value*/
#define BTR_PCUR_OLD_STORED 908467085
#define BTR_PCUR_OLD_NOT_STORED 122766467
/*BTree persistent cursor的状态结构信息*/
struct btr_pcur_struct
{
btr_cur_t btr_cur; /*btree游标*/
ulint latch_mode; /*latch 模式，x-latch s-latch*/
ulint old_stored; /*BTR_PCUR_OLD_STORED/BTR_PCUR_OLD_NOT_STORED,表示是否存有上一条记录的标识*/
rec_t* old_rec;
ulint rel_pos; /*BTR_PCUR_ON, BTR_PCUR_BEFORE, or BTR_PCUR_AFTER,old cursor页位置方向标识*/
dulint modify_clock; /*store old rec时ibuf的modify clock*/
ulint pos_state; /*BTR_PCUR_IS_POSITIONED..*/
ulint search_mode; /*搜索方式：PAGE_CUR_G..*/
mtr_t* mtr; /*mini trancation*/
byte* old_rec_buf;
ulint buf_size;
};
btr_pcur_t* btr_pcur_create_for_mysql();
void btr_pcur_free_for_mysql(btr_pcur_t* cursor);
void btr_pcur_copy_stored_position(btr_pcur_t* pcur_receive, btr_pcur_t* pcur_donate);
UNIV_INLINE void btr_pcur_init(dict_index_t* index, dtuple_t* tuple, ulint mode, ulint latch_mode, btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE void btr_pcur_open_with_no_init(dict_index_t* index, dtuple_t* tuple, ulint mode, ulint latch_mode, btr_pcur_t* cursor, ulint has_search_latch, mtr_t* mtr);
UNIV_INLINE void btr_pcur_open_at_index_side(ibool from_left, dict_index_t* index, ulint latch_mode, btr_pcur_t* pcur, ibool do_init, mtr_t* mtr);
UNIV_INLINE ulint btr_pcur_get_up_match(btr_pcur_t* cursor);
UNIV_INLINE ulint btr_pcur_get_low_match(btr_pcur_t* cursor);
void btr_pcur_open_on_user_rec(dict_index_t* index, dtuple_t* tuple, ulint mode, ulint latch_mode, btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE void btr_pcur_open_at_rnd_pos(dict_index_t* index, ulint latch_mode, btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE void btr_pcur_close(btr_pcur_t* cursor);
void btr_pcur_store_position(btr_pcur_t* cursor, mtr_t* mtr);
void btr_pcur_restore_position(ulint latch_mode, btr_pcur_t* pcur, mtr_t* mtr);
void btr_pcur_release_leaf(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE ulint btr_pcur_get_rel_pos(btr_pcur_t* cursor);
UNIV_INLINE void btr_pcur_set_mtr(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE mtr_t* btr_pcur_get_mtr(btr_pcur_t* cursor);
UNIV_INLINE void btr_pcur_commit(btr_pcur_t* pcur);
UNIV_INLINE void btr_pcur_commit_specify_mtr(btr_pcur_t* pcur, mtr_t* mtr);
UNIV_INLINE ibool btr_pcur_is_detached(btr_pcur_t* pcur);
UNIV_INLINE ibool btr_pcur_move_to_next(btr_pcur_t* cursor, mtr_t* mtr);
ibool btr_pcur_move_to_prev(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE ibool btr_pcur_move_to_next_user_rec(btr_pcur_t* cursor, mtr_t* mtr);
void btr_pcur_move_to_next_page(btr_pcur_t* cursor, mtr_t* mtr);
void btr_pcur_move_backward_from_page(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE btr_cur_t* btr_pcur_get_btr_cur(btr_pcur_t* cursor);
UNIV_INLINE page_cur_t* btr_pcur_get_page_cur(btr_pcur_t* cursor);
UNIV_INLINE page_t* btr_pcur_get_page(btr_pcur_t* cursor);
UNIV_INLINE rec_t* btr_pcur_get_rec(btr_pcur_t* cursor);
UNIV_INLINE ibool btr_pcur_is_on_user_rec(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE ibool btr_pcur_is_after_last_on_page(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE ibool btr_pcur_is_before_first_on_page(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE ibool btr_pcur_is_before_first_in_tree(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE ibool btr_pcur_is_after_last_in_tree(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE void btr_pcur_move_to_next_on_page(btr_pcur_t* cursor, mtr_t* mtr);
UNIV_INLINE void btr_pcur_move_to_prev_on_page(btr_pcur_t* cursor, mtr_t* mtr);
#include "btr0pcur.inl"
#endif