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Diffstat (limited to 'storage/perfschema/table_performance_timers.h')
-rw-r--r-- | storage/perfschema/table_performance_timers.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/storage/perfschema/table_performance_timers.h b/storage/perfschema/table_performance_timers.h new file mode 100644 index 00000000..a28b4d3f --- /dev/null +++ b/storage/perfschema/table_performance_timers.h @@ -0,0 +1,92 @@ +/* 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(); + + virtual int rnd_next(); + virtual int rnd_pos(const void *pos); + virtual void reset_position(void); + +protected: + virtual int read_row_values(TABLE *table, + unsigned char *buf, + Field **fields, + bool read_all); + +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 |