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#ifndef INCLUDES_MYSQL_INSTANCE_MANAGER_INSTANCE_H
#define INCLUDES_MYSQL_INSTANCE_MANAGER_INSTANCE_H
/* Copyright (C) 2004 MySQL AB
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; either version 2 of the License, or
(at your option) any later version.
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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <my_global.h>
#include <m_string.h>
#include "instance_options.h"
#include "priv.h"
#if defined(__GNUC__) && defined(USE_PRAGMA_INTERFACE)
#pragma interface
#endif
class Instance_map;
class Thread_registry;
/*
Instance_name -- the class represents instance name -- a string of length
less than MAX_INSTANCE_NAME_SIZE.
Generally, this is just a string with self-memory-management and should be
eliminated in the future.
*/
class Instance_name
{
public:
Instance_name(const LEX_STRING *name);
public:
inline const LEX_STRING *get_str() const
{
return &str;
}
inline const char *get_c_str() const
{
return str.str;
}
inline uint get_length() const
{
return str.length;
}
private:
LEX_STRING str;
char str_buffer[MAX_INSTANCE_NAME_SIZE];
};
class Instance
{
public:
/*
The following two constants defines name of the default mysqld-instance
("mysqld").
*/
static const LEX_STRING DFLT_INSTANCE_NAME;
public:
/*
The operation is intended to check whether string is a well-formed
instance name or not.
*/
static bool is_name_valid(const LEX_STRING *name);
/*
The operation is intended to check if the given instance name is
mysqld-compatible or not.
*/
static bool is_mysqld_compatible_name(const LEX_STRING *name);
public:
Instance();
~Instance();
bool init(const LEX_STRING *name_arg);
bool complete_initialization();
bool is_mysqld_running();
int start();
int stop();
/* send a signal to the instance */
void kill_mysqld(int signo);
bool is_crashed();
void set_crash_flag_n_wake_all();
/*
The operation is intended to check if the instance is mysqld-compatible
or not.
*/
inline bool is_mysqld_compatible() const;
/*
The operation is intended to check if the instance is configured properly
or not. Misconfigured instances are not managed.
*/
inline bool is_configured() const;
inline const LEX_STRING *get_name() const;
public:
enum { DEFAULT_SHUTDOWN_DELAY= 35 };
Instance_options options;
private:
/* This attributes is a flag, specifies if the instance has been crashed. */
bool crashed;
/*
This attribute specifies if the instance is configured properly or not.
Misconfigured instances are not managed.
*/
bool configured;
/*
This attribute specifies whether the instance is mysqld-compatible or not.
Mysqld-compatible instances can contain only mysqld-specific options.
At the moment an instance is mysqld-compatible if its name is "mysqld".
The idea is that [mysqld] section should contain only mysqld-specific
options (no Instance Manager-specific options) to be readable by mysqld
program.
*/
bool mysqld_compatible;
/*
Mutex protecting the instance. Currently we use it to avoid the
double start of the instance. This happens when the instance is starting
and we issue the start command once more.
*/
pthread_mutex_t LOCK_instance;
/*
This condition variable is used to wake threads waiting for instance to
stop in Instance::stop()
*/
pthread_cond_t COND_instance_stopped;
void remove_pid();
};
inline bool Instance::is_mysqld_compatible() const
{
return mysqld_compatible;
}
inline bool Instance::is_configured() const
{
return configured;
}
inline const LEX_STRING *Instance::get_name() const
{
return &options.instance_name;
}
#endif /* INCLUDES_MYSQL_INSTANCE_MANAGER_INSTANCE_H */
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