102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
/* Copyright (c) 2018, 2021, Alibaba 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/PolarDB-X Engine hereby grant you an
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additional permission to link the program and your derivative works with the
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separately licensed software that they have included with
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MySQL/PolarDB-X Engine.
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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 SQL_RECYCLE_BIN_RECYCLE_INCLUDED
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#define SQL_RECYCLE_BIN_RECYCLE_INCLUDED
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#include "mysql/components/services/psi_memory_bits.h"
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#include "sql/sql_class.h"
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#include "sql/sql_lex.h"
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class THD;
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namespace im {
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namespace recycle_bin {
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/* Init recycle bin context */
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void recycle_init();
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/* Deinit recycle bin context */
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void recycle_deinit();
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/* Start recycle scheduler thread */
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bool recycle_scheduler_start(bool bootstrap);
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/* Recycle bin memory instrument */
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extern PSI_memory_key key_memory_recycle;
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/* Thread local state */
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class Recycle_state {
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public:
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explicit Recycle_state() : m_set(false), m_priv_relax(false) {}
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explicit Recycle_state(const Recycle_state &other) : m_set(other.m_set) {}
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void set() { m_set = true; }
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bool is_set() { return m_set; }
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bool is_priv_relax() { return m_priv_relax; }
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void set_priv_relax() { m_priv_relax = true; }
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private:
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/* label thread state to treat specially */
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bool m_set;
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/* Whether check the recycle schema access rule */
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bool m_priv_relax;
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};
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/* Lex local state */
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class Recycle_lex {
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public:
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explicit Recycle_lex(THD *thd) : m_thd(thd), m_backed_up_lex(thd->lex) {
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thd->lex = &m_lex;
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lex_start(thd);
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}
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~Recycle_lex() {
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lex_end(&m_lex);
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m_thd->lex = m_backed_up_lex;
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}
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private:
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THD *m_thd;
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LEX *m_backed_up_lex;
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LEX m_lex;
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};
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/* Save the thread recycle state within once command execution. */
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class Recycle_process_context {
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public:
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explicit Recycle_process_context(THD *thd);
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virtual ~Recycle_process_context();
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private:
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THD *m_thd;
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Recycle_state *m_saved_recycle_state;
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Recycle_state m_recycle_state;
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};
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} /* namespace recycle_bin */
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} /* namespace im */
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#endif
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