141 lines
3.6 KiB
C++
141 lines
3.6 KiB
C++
/* Copyright (c) 2016, 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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#ifndef TABLE_DATA_LOCK_H
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#define TABLE_DATA_LOCK_H
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/**
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@file storage/perfschema/table_data_locks.h
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Table DATA_LOCKS (declarations).
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*/
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#include <sys/types.h>
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#include "my_base.h"
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#include "storage/perfschema/pfs.h"
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#include "storage/perfschema/pfs_data_lock.h"
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#include "storage/perfschema/pfs_engine_table.h"
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class Field;
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class PSI_engine_data_lock_iterator;
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class Plugin_table;
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struct TABLE;
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struct THR_LOCK;
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/**
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@addtogroup Performance_schema_tables
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@{
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*/
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/**
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Position of a cursor on
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PERFORMANCE_SCHEMA.DATA_LOCKS.
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Index 1 on engine (0 based)
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Index 2 on engine index (0 based)
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*/
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struct scan_pos_data_lock {
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scan_pos_data_lock() {
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m_index_1 = 0;
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m_index_2 = 0;
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}
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inline void reset(void) {
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m_index_1 = 0;
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m_index_2 = 0;
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}
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void set_at(const scan_pos_data_lock *other) {
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m_index_1 = other->m_index_1;
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m_index_2 = other->m_index_2;
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}
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void set_after(const scan_pos_data_lock *other) {
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m_index_1 = other->m_index_1;
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m_index_2 = other->m_index_2 + 1;
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}
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inline bool has_more_engine() {
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return (m_index_1 < COUNT_DATA_LOCK_ENGINES);
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}
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inline void next_engine() {
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m_index_1++;
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m_index_2 = 0;
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}
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unsigned int m_index_1;
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unsigned int m_index_2;
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};
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/** Table PERFORMANCE_SCHEMA.DATA_LOCKS. */
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class table_data_locks : public PFS_engine_table {
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typedef scan_pos_data_lock scan_pos_t;
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typedef pk_pos_data_lock pk_pos_t;
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public:
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/** Table share. */
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static PFS_engine_table_share m_share;
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static PFS_engine_table *create(PFS_engine_table_share *);
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static ha_rows get_row_count();
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virtual int rnd_next();
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virtual int rnd_pos(const void *pos);
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virtual void reset_position(void);
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virtual int index_init(uint idx, bool sorted);
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virtual int index_next();
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private:
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virtual int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
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bool read_all);
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table_data_locks();
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void destroy_iterators();
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public:
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~table_data_locks();
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private:
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/** Table share lock. */
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static THR_LOCK m_table_lock;
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/** Table definition. */
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static Plugin_table m_table_def;
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/** Current row. */
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row_data_lock *m_row;
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/** Current scan position. */
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scan_pos_t m_pos;
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/** Next scan position. */
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scan_pos_t m_next_pos;
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/** Current pk position. */
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pk_pos_t m_pk_pos;
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PFS_data_lock_container m_container;
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PSI_engine_data_lock_iterator *m_iterator[COUNT_DATA_LOCK_ENGINES];
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PFS_index_data_locks *m_opened_index;
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};
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/** @} */
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#endif
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