mirror of
https://github.com/MariaDB/server.git
synced 2025-01-15 19:42:28 +01:00
55db59f16d
PFS_atomic class contains wrappers around my_atomic_* operations, which
are macros to GNU atomic operations (__atomic_*). Due to different
implementations of compilers, clang may encounter errors when compiling
on x86_32 architecture.
The following functions are replaced with C++ std::atomic type in
performance schema code base:
- PFS_atomic::store_*()
-> my_atomic_store*
-> __atomic_store_n()
=> std::atomic<T>::store()
- PFS_atomic::load_*()
-> my_atomic_load*
-> __atomic_load_n()
=> std::atomic<T>::load()
- PFS_atomic::add_*()
-> my_atomic_add*
-> __atomic_fetch_add()
=> std::atomic<T>::fetch_add()
- PFS_atomic::cas_*()
-> my_atomic_cas*
-> __atomic_compare_exchange_n()
=> std::atomic<T>::compare_exchange_strong()
and PFS_atomic class could be dropped completely.
Note that in the wrapper memory order passed to original GNU atomic
extensions are hard-coded as `__ATOMIC_SEQ_CST`, which is equivalent to
`std::memory_order_seq_cst` in C++, and is the default parameter for
std::atomic_* functions.
All new code of the whole pull request, including one or several files
that are either new files or modified ones, are contributed under the
BSD-new license. I am contributing on behalf of my employer Amazon Web
Services.
137 lines
3.8 KiB
C++
137 lines
3.8 KiB
C++
/* 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_ACCOUNT_H
|
|
#define PFS_ACCOUNT_H
|
|
|
|
/**
|
|
@file storage/perfschema/pfs_account.h
|
|
Performance schema account (declarations).
|
|
*/
|
|
#include <atomic>
|
|
|
|
#include "pfs_lock.h"
|
|
#include "lf.h"
|
|
#include "pfs_con_slice.h"
|
|
#include "mysql_com.h" /* USERNAME_LENGTH */
|
|
|
|
struct PFS_global_param;
|
|
struct PFS_user;
|
|
struct PFS_host;
|
|
struct PFS_thread;
|
|
struct PFS_memory_stat_delta;
|
|
|
|
/**
|
|
@addtogroup Performance_schema_buffers
|
|
@{
|
|
*/
|
|
|
|
/** Hash key for an account. */
|
|
struct PFS_account_key
|
|
{
|
|
/**
|
|
Hash search key.
|
|
This has to be a string for LF_HASH,
|
|
the format is "<username><0x00><hostname><0x00>"
|
|
*/
|
|
char m_hash_key[USERNAME_LENGTH + 1 + HOSTNAME_LENGTH + 1];
|
|
uint m_key_length;
|
|
};
|
|
|
|
/** Per account statistics. */
|
|
struct PFS_ALIGNED PFS_account : 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, PFS_user *safe_user, PFS_host *safe_host);
|
|
void aggregate_waits(PFS_user *safe_user, PFS_host *safe_host);
|
|
void aggregate_stages(PFS_user *safe_user, PFS_host *safe_host);
|
|
void aggregate_statements(PFS_user *safe_user, PFS_host *safe_host);
|
|
void aggregate_transactions(PFS_user *safe_user, PFS_host *safe_host);
|
|
void aggregate_memory(bool alive, PFS_user *safe_user, PFS_host *safe_host);
|
|
void aggregate_status(PFS_user *safe_user, PFS_host *safe_host);
|
|
void aggregate_stats(PFS_user *safe_user, PFS_host *safe_host);
|
|
void release(void);
|
|
|
|
void carry_memory_stat_delta(PFS_memory_stat_delta *delta, uint index);
|
|
|
|
/** Internal lock. */
|
|
pfs_lock m_lock;
|
|
PFS_account_key m_key;
|
|
/** True if this account is enabled, per rules in table SETUP_ACTORS. */
|
|
bool m_enabled;
|
|
/** True if this account has history enabled, per rules in table SETUP_ACTORS. */
|
|
bool m_history;
|
|
const char *m_username;
|
|
uint m_username_length;
|
|
const char *m_hostname;
|
|
uint m_hostname_length;
|
|
PFS_user *m_user;
|
|
PFS_host *m_host;
|
|
|
|
ulonglong m_disconnected_count;
|
|
|
|
private:
|
|
std::atomic<int> m_refcount;
|
|
};
|
|
|
|
int init_account(const PFS_global_param *param);
|
|
void cleanup_account(void);
|
|
int init_account_hash(const PFS_global_param *param);
|
|
void cleanup_account_hash(void);
|
|
|
|
PFS_account *
|
|
find_or_create_account(PFS_thread *thread,
|
|
const char *username, uint username_length,
|
|
const char *hostname, uint hostname_length);
|
|
|
|
PFS_account *sanitize_account(PFS_account *unsafe);
|
|
void purge_all_account(void);
|
|
|
|
void update_accounts_derived_flags(PFS_thread *thread);
|
|
|
|
/* For show status. */
|
|
|
|
extern LF_HASH account_hash;
|
|
|
|
/** @} */
|
|
#endif
|
|
|