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75 lines
3.1 KiB
75 lines
3.1 KiB
/* Copyright (c) 2015, 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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#ifndef LOCKING_SERVICE_INCLUDED
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#define LOCKING_SERVICE_INCLUDED
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#include <stddef.h>
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#include "my_systime.h" // Timout_type
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#include "mysql/service_locking.h" // enum_locking_service_lock_type
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class THD;
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/**
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Acquire locking service locks.
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@param opaque_thd Thread handle. If NULL, current_thd will be used.
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@param lock_namespace Namespace of the locks to acquire.
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@param lock_names Array of names of the locks to acquire.
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@param lock_num Number of elements in 'lock_names'.
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@param lock_type Lock type to acquire. LOCKING_SERVICE_READ or _WRITE.
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@param lock_timeout Number of seconds to wait before giving up.
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@retval 1 Acquisition failed, error has been reported.
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@retval 0 Acquisition successful, all locks acquired.
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@note both lock_namespace and lock_names are limited to 64 characters max.
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Names are compared using binary comparison.
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*/
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int acquire_locking_service_locks(MYSQL_THD opaque_thd,
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const char *lock_namespace,
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const char **lock_names, size_t lock_num,
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enum enum_locking_service_lock_type lock_type,
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Timeout_type lock_timeout);
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/**
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Release all lock service locks taken by the given connection
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in the given namespace.
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@param opaque_thd Thread handle. If NULL, current_thd will be used.
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@param lock_namespace Namespace of the locks to release.
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@retval 1 Release failed, error has been reported.
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@retval 0 Release successful, all locks acquired.
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*/
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int release_locking_service_locks(MYSQL_THD opaque_thd,
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const char *lock_namespace);
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/**
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Release all locking service locks taken by the given connection
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in all namespaces.
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@param thd Thread handle.
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*/
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void release_all_locking_service_locks(THD *thd);
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#endif /* LOCKING_SERVICE_INCLUDED */
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