82 lines
2.8 KiB
C++
82 lines
2.8 KiB
C++
/* Copyright (c) 2016, 2024, Oracle and/or its affiliates.
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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 designed to work 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 either included with
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the program or referenced in the documentation.
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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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#ifndef CONNECTION_CONTROL_H
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#define CONNECTION_CONTROL_H
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#include <mysql/psi/mysql_cond.h>
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#include <mysql/psi/mysql_mutex.h>
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#include <mysql/psi/mysql_rwlock.h>
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#include <mysql/psi/mysql_stage.h>
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#include <mysql/psi/mysql_thread.h> /* mysql_rwlock_t */
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#include "plugin/connection_control/connection_control_data.h"
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extern PSI_mutex_key key_connection_delay_mutex;
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extern PSI_rwlock_key key_connection_event_delay_lock;
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extern PSI_cond_key key_connection_delay_wait;
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extern PSI_stage_info stage_waiting_in_connection_control_plugin;
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namespace connection_control {
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/** Helper class : Wrapper on READ lock */
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class RD_lock {
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public:
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explicit RD_lock(mysql_rwlock_t *lock) : m_lock(lock) {
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if (m_lock) mysql_rwlock_rdlock(m_lock);
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}
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~RD_lock() {
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if (m_lock) mysql_rwlock_unlock(m_lock);
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}
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void lock() { mysql_rwlock_rdlock(m_lock); }
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void unlock() { mysql_rwlock_unlock(m_lock); }
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private:
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mysql_rwlock_t *m_lock;
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RD_lock(const RD_lock &); /* Not copyable. */
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void operator=(const RD_lock &); /* Not assignable. */
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};
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/** Helper class : Wrapper on write lock */
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class WR_lock {
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public:
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explicit WR_lock(mysql_rwlock_t *lock) : m_lock(lock) {
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if (m_lock) mysql_rwlock_wrlock(m_lock);
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}
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~WR_lock() {
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if (m_lock) mysql_rwlock_unlock(m_lock);
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}
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void lock() { mysql_rwlock_wrlock(m_lock); }
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void unlock() { mysql_rwlock_unlock(m_lock); }
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private:
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mysql_rwlock_t *m_lock;
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WR_lock(const WR_lock &); /* Not copyable. */
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void operator=(const WR_lock &); /* Not assignable. */
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};
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} // namespace connection_control
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#endif /* !CONNECTION_CONTROL_H */
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