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/* Copyright (c) 2010, 2013, 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
#ifndef PFS_HOST_H
#define PFS_HOST_H
/**
@file storage/perfschema/pfs_host.h
Performance schema host (declarations).
*/
#include "pfs_lock.h"
#include "lf.h"
#include "pfs_con_slice.h"
struct PFS_global_param;
struct PFS_thread;
/**
@addtogroup Performance_schema_buffers
@{
*/
struct PFS_host_key
{
/**
Hash search key.
This has to be a string for LF_HASH,
the format is "<hostname><0x00>"
*/
char m_hash_key[HOSTNAME_LENGTH + 1];
uint m_key_length;
};
struct PFS_ALIGNED PFS_host : PFS_connection_slice
{
public:
inline void init_refcount(void)
{
PFS_atomic::store_32(& m_refcount, 1);
}
inline int get_refcount(void)
{
return PFS_atomic::load_32(& m_refcount);
}
inline void inc_refcount(void)
{
PFS_atomic::add_32(& m_refcount, 1);
}
inline void dec_refcount(void)
{
PFS_atomic::add_32(& m_refcount, -1);
}
void aggregate(void);
void aggregate_waits(void);
void aggregate_stages(void);
void aggregate_statements(void);
void aggregate_stats(void);
void release(void);
/* Internal lock. */
pfs_lock m_lock;
PFS_host_key m_key;
const char *m_hostname;
uint m_hostname_length;
ulonglong m_disconnected_count;
private:
int m_refcount;
};
int init_host(const PFS_global_param *param);
void cleanup_host(void);
int init_host_hash(void);
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 iterators and show status. */
extern ulong host_max;
extern ulong host_lost;
/* Exposing the data directly, for iterators. */
extern PFS_host *host_array;
extern LF_HASH host_hash;
/** @} */
#endif
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