147 lines
4.0 KiB
C++
147 lines
4.0 KiB
C++
/* Copyright (c) 2010, 2019, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef PFS_USER_H
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#define PFS_USER_H
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/**
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@file storage/perfschema/pfs_user.h
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Performance schema user (declarations).
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*/
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#include <sys/types.h>
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#include <atomic>
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#include "lf.h"
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#include "my_inttypes.h"
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#include "mysql_com.h"
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#include "storage/perfschema/pfs_con_slice.h"
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#include "storage/perfschema/pfs_global.h"
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#include "storage/perfschema/pfs_lock.h"
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struct PFS_global_param;
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struct PFS_memory_stat_delta;
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struct PFS_memory_shared_stat;
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struct PFS_thread;
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/**
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@addtogroup performance_schema_buffers
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@{
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*/
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/** Hash key for a user. */
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struct PFS_user_key {
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/**
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Hash search key.
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This has to be a string for @c LF_HASH,
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the format is @c "<username><0x00>"
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*/
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char m_hash_key[USERNAME_LENGTH + 1];
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uint m_key_length;
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};
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/** Per user statistics. */
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struct PFS_ALIGNED PFS_user : public PFS_connection_slice {
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public:
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inline void init_refcount(void) { m_refcount.store(1); }
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inline int get_refcount(void) { return m_refcount.load(); }
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inline void inc_refcount(void) { ++m_refcount; }
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inline void dec_refcount(void) { --m_refcount; }
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void aggregate(bool alive);
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void aggregate_waits(void);
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void aggregate_stages(void);
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void aggregate_statements(void);
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void aggregate_transactions(void);
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void aggregate_errors(void);
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void aggregate_memory(bool alive);
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void aggregate_status(void);
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void aggregate_stats(void);
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void release(void);
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/** Reset all memory statistics. */
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void rebase_memory_stats();
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void carry_memory_stat_delta(PFS_memory_stat_delta *delta, uint index);
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void set_instr_class_memory_stats(PFS_memory_shared_stat *array) {
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m_has_memory_stats = false;
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m_instr_class_memory_stats = array;
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}
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const PFS_memory_shared_stat *read_instr_class_memory_stats() const {
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if (!m_has_memory_stats) {
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return NULL;
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}
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return m_instr_class_memory_stats;
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}
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PFS_memory_shared_stat *write_instr_class_memory_stats() {
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if (!m_has_memory_stats) {
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rebase_memory_stats();
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m_has_memory_stats = true;
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}
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return m_instr_class_memory_stats;
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}
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/** Internal lock. */
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pfs_lock m_lock;
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PFS_user_key m_key;
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const char *m_username;
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uint m_username_length;
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ulonglong m_disconnected_count;
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private:
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std::atomic<int> m_refcount;
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/**
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Per user memory aggregated statistics.
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This member holds the data for the table
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PERFORMANCE_SCHEMA.MEMORY_SUMMARY_BY_USER_BY_EVENT_NAME.
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Immutable, safe to use without internal lock.
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*/
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PFS_memory_shared_stat *m_instr_class_memory_stats;
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};
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int init_user(const PFS_global_param *param);
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void cleanup_user(void);
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int init_user_hash(const PFS_global_param *param);
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void cleanup_user_hash(void);
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PFS_user *find_or_create_user(PFS_thread *thread, const char *username,
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uint username_length);
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PFS_user *sanitize_user(PFS_user *unsafe);
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void purge_all_user(void);
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/* For show status. */
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extern LF_HASH user_hash;
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/** @} */
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#endif
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