/* Copyright (c) 2010, 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
#ifndef PFS_HOST_H
#define PFS_HOST_H
/**
@ file storage / perfschema / pfs_host . h
Performance schema host ( declarations ) .
*/
#include <atomic>
#include "pfs_lock.h"
#include "lf.h"
#include "pfs_con_slice.h"
struct PFS_global_param;
struct PFS_thread;
/**
@ addtogroup Performance_schema_buffers
@ {
*/
/** Hash key for a host. */
struct PFS_host_key
{
/**
Hash search key .
This has to be a string for LF_HASH ,
the format is " < hostname > < 0 x00 > "
*/
char m_hash_key[HOSTNAME_LENGTH + 1 ];
uint m_key_length;
};
/** Per host statistics. */
struct PFS_ALIGNED PFS_host : PFS_connection_slice
{
public :
inline void init_refcount(void )
{
m_refcount.store(1 );
}
inline int get_refcount(void )
{
return m_refcount.load();
}
inline void inc_refcount(void )
{
m_refcount.fetch_add(1 );
}
inline void dec_refcount(void )
{
m_refcount.fetch_sub(1 );
}
void aggregate(bool alive);
void aggregate_waits(void );
void aggregate_stages(void );
void aggregate_statements(void );
void aggregate_transactions(void );
void aggregate_memory(bool alive);
void aggregate_status(void );
void aggregate_stats(void );
void release(void );
void carry_memory_stat_delta(PFS_memory_stat_delta *delta, uint index);
/* Internal lock. */
pfs_lock m_lock;
PFS_host_key m_key;
const char *m_hostname;
uint m_hostname_length;
ulonglong m_disconnected_count;
private :
std::atomic<int > m_refcount;
};
int init_host(const PFS_global_param *param);
void cleanup_host(void );
int init_host_hash(const PFS_global_param *param);
void cleanup_host_hash(void );
PFS_host *find_or_create_host(PFS_thread *thread,
const char *hostname, uint hostname_length);
PFS_host *sanitize_host(PFS_host *unsafe);
void purge_all_host(void );
/* For show status. */
extern LF_HASH host_hash;
/** @} */
#endif
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