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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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/* Copyright (c) 2019, MariaDB Corporation.
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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 as published by
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the Free Software Foundation; version 2 of the License.
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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 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 02110-1335 USA */
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#pragma once
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/**
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@file include/mysql/service_thd_mdl.h
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This service provides functions for plugins and storage engines to access
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metadata locks.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern struct thd_mdl_service_st {
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void *(*thd_mdl_context)(MYSQL_THD);
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} *thd_mdl_service;
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#ifdef MYSQL_DYNAMIC_PLUGIN
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# define thd_mdl_context(_THD) thd_mdl_service->thd_mdl_context(_THD)
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#else
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/**
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MDL_context accessor
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@param thd the current session
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@return pointer to thd->mdl_context
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*/
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void *thd_mdl_context(MYSQL_THD thd);
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#endif
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#ifdef __cplusplus
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}
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#endif
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