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70 lines
2.6 KiB
70 lines
2.6 KiB
5 months ago
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/* Copyright (c) 2010, 2018, 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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#ifndef LOCK_INCLUDED
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#define LOCK_INCLUDED
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#include <stddef.h>
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#include <sys/types.h>
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#include <string>
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#include "map_helpers.h"
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#include "sql/mdl.h"
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class THD;
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// Forward declarations
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struct TABLE;
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struct THR_LOCK_DATA;
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struct MYSQL_LOCK {
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TABLE **table;
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uint table_count, lock_count;
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THR_LOCK_DATA **locks;
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};
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MYSQL_LOCK *mysql_lock_tables(THD *thd, TABLE **table, size_t count,
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uint flags);
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void mysql_unlock_tables(THD *thd, MYSQL_LOCK *sql_lock);
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void mysql_unlock_read_tables(THD *thd, MYSQL_LOCK *sql_lock);
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void mysql_unlock_some_tables(THD *thd, TABLE **table, uint count);
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void mysql_lock_remove(THD *thd, MYSQL_LOCK *locked, TABLE *table);
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void mysql_lock_abort_for_thread(THD *thd, TABLE *table);
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MYSQL_LOCK *mysql_lock_merge(MYSQL_LOCK *a, MYSQL_LOCK *b);
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/* Lock based on name */
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bool lock_schema_name(THD *thd, const char *db);
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// Hash set to hold set of tablespace names.
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typedef malloc_unordered_set<std::string> Tablespace_hash_set;
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// Lock tablespace names.
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bool lock_tablespace_names(THD *thd, Tablespace_hash_set *tablespace_set,
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ulong lock_wait_timeout);
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/* Lock based on stored routine name */
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bool lock_object_name(THD *thd, MDL_key::enum_mdl_namespace mdl_type,
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const char *db, const char *name);
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/* Acquire protection against the global read lock. */
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bool acquire_shared_global_read_lock(THD *thd, unsigned long lock_wait_timeout);
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#endif /* LOCK_INCLUDED */
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