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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, Fifth Floor, Boston, MA 02110-1335 USA */
#ifndef TABLE_SYNC_INSTANCE_H
#define TABLE_SYNC_INSTANCE_H
/**
@file storage/perfschema/table_sync_instances.h
Table MUTEX_INSTANCES, RWLOCK_INSTANCES and COND_INSTANCES (declarations).
*/
#include "pfs_column_types.h"
#include "pfs_engine_table.h"
struct PFS_mutex;
struct PFS_rwlock;
struct PFS_cond;
/**
@addtogroup Performance_schema_tables
@{
*/
/** A row of table PERFORMANCE_SCHEMA.MUTEX_INSTANCES. */
struct row_mutex_instances
{
/** Column NAME. */
const char *m_name;
/** Length in bytes of @c m_name. */
uint m_name_length;
/** Column OBJECT_INSTANCE_BEGIN. */
const void *m_identity;
/** True if column LOCKED_BY_THREAD_ID is not null. */
bool m_locked;
/** Column LOCKED_BY_THREAD_ID. */
ulonglong m_locked_by_thread_id;
};
/** Table PERFORMANCE_SCHEMA.MUTEX_INSTANCES. */
class table_mutex_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_mutex_instances();
public:
~table_mutex_instances()
{}
private:
void make_row(PFS_mutex *pfs);
/** Table share lock. */
static THR_LOCK m_table_lock;
/** Current row. */
row_mutex_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;
};
/** A row of table PERFORMANCE_SCHEMA.RWLOCK_INSTANCES. */
struct row_rwlock_instances
{
/** Column NAME. */
const char *m_name;
/** Length in bytes of @c m_name. */
uint m_name_length;
/** Column OBJECT_INSTANCE_BEGIN. */
const void *m_identity;
/** True if column WRITE_LOCKED_BY_THREAD_ID is not null. */
bool m_write_locked;
/** Column WRITE_LOCKED_BY_THREAD_ID. */
ulonglong m_write_locked_by_thread_id;
/** Column READ_LOCKED_BY_COUNT. */
ulong m_readers;
};
/** Table PERFORMANCE_SCHEMA.RWLOCK_INSTANCES. */
class table_rwlock_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_rwlock_instances();
public:
~table_rwlock_instances()
{}
private:
void make_row(PFS_rwlock *pfs);
/** Table share lock. */
static THR_LOCK m_table_lock;
/** Current row. */
row_rwlock_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;
};
/** A row of table PERFORMANCE_SCHEMA.COND_INSTANCES. */
struct row_cond_instances
{
/** Column NAME. */
const char *m_name;
/** Length in bytes of @c m_name. */
uint m_name_length;
/** Column OBJECT_INSTANCE_BEGIN. */
const void *m_identity;
};
/** Table PERFORMANCE_SCHEMA.COND_INSTANCES. */
class table_cond_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_cond_instances();
public:
~table_cond_instances()
{}
private:
void make_row(PFS_cond *pfs);
/** Table share lock. */
static THR_LOCK m_table_lock;
/** Current row. */
row_cond_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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