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/* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
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 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, Suite 500, Boston, MA 02110-1335 USA */
#ifndef TABLE_FILE_INSTANCES_H
#define TABLE_FILE_INSTANCES_H
/**
@file storage/perfschema/table_file_instances.h
Table FILE_INSTANCES (declarations).
*/
#include "pfs_column_types.h"
#include "pfs_engine_table.h"
/**
@addtogroup Performance_schema_tables
@{
*/
/** A row of PERFORMANCE_SCHEMA.FILE_INSTANCES. */
struct row_file_instances
{
/** Column FILE_NAME. */
const char *m_filename;
/** Length in bytes of @c m_filename. */
uint m_filename_length;
/** Column EVENT_NAME. */
const char *m_event_name;
/** Length in bytes of @c m_event_name. */
uint m_event_name_length;
/** Column OPEN_COUNT. */
uint m_open_count;
};
/** Table PERFORMANCE_SCHEMA.FILE_INSTANCES. */
class table_file_instances : public PFS_engine_table
{
public:
/** Table share */
static PFS_engine_table_share m_share;
static PFS_engine_table* create();
virtual int rnd_next();
virtual int rnd_pos(const void *pos);
virtual void reset_position(void);
private:
virtual int read_row_values(TABLE *table,
unsigned char *buf,
Field **fields,
bool read_all);
table_file_instances();
public:
~table_file_instances()
{}
private:
void make_row(PFS_file *pfs);
/** Table share lock. */
static THR_LOCK m_table_lock;
/** Fields definition. */
static TABLE_FIELD_DEF m_field_def;
/** Current row. */
row_file_instances m_row;
/** True if the current row exists. */
bool m_row_exists;
/** Current position. */
PFS_simple_index m_pos;
/** Next position. */
PFS_simple_index m_next_pos;
};
/** @} */
#endif
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