/* Copyright (c) 2008, 2023, Oracle and/or its affiliates.
This program is free software ; you can redistribute it and / or modify
it under the terms of the GNU General Public License , version 2 . 0 ,
as published by the Free Software Foundation .
This program is also distributed with certain software ( including
but not limited to OpenSSL ) that is licensed under separate terms ,
as designated in a particular file or component or in included license
documentation . The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL .
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 , version 2 . 0 , 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 ,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
#ifndef TABLE_PERFORMANCE_TIMERS_H
#define TABLE_PERFORMANCE_TIMERS_H
/**
@ file storage / perfschema / table_performance_timers . h
Table PERFORMANCE_TIMERS ( declarations ) .
*/
#include <my_rdtsc.h>
#include "pfs_column_types.h"
#include "pfs_engine_table.h"
/**
@ addtogroup Performance_schema_tables
@ {
*/
/** A row of PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS. */
struct row_performance_timers
{
/** Column TIMER_NAME. */
enum_timer_name m_timer_name;
/**
Columns ROUTINE ( not displayed ) , TIMER_OVERHEAD ,
TIMER_FREQUENCY , TIMER_RESOLUTION .
*/
struct my_timer_unit_info m_info;
};
/** Table PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS. */
class table_performance_timers : public PFS_engine_table
{
public :
static PFS_engine_table_share_state m_share_state;
/** Table share. */
static PFS_engine_table_share m_share;
static PFS_engine_table* create();
static ha_rows get_row_count();
int rnd_next() override;
int rnd_pos(const void *pos) override;
void reset_position(void ) override;
protected :
int read_row_values(TABLE *table,
unsigned char *buf,
Field **fields,
bool read_all) override;
protected :
table_performance_timers();
public :
~table_performance_timers() = default ;
private :
/** Table share lock. */
static THR_LOCK m_table_lock;
/** Current row. */
row_performance_timers *m_row;
/** Current position. */
PFS_simple_index m_pos;
/** Next position. */
PFS_simple_index m_next_pos;
row_performance_timers m_data[COUNT_TIMER_NAME];
};
/** @} */
#endif
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