Current File : //usr/include/mysql/server/mysql/service_thd_mdl.h
/* Copyright (c) 2019, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#pragma once
/**
@file include/mysql/service_thd_mdl.h
This service provides functions for plugins and storage engines to access
metadata locks.
*/
#ifdef __cplusplus
extern "C" {
#endif
extern struct thd_mdl_service_st {
void *(*thd_mdl_context)(MYSQL_THD);
} *thd_mdl_service;
#ifdef MYSQL_DYNAMIC_PLUGIN
# define thd_mdl_context(_THD) thd_mdl_service->thd_mdl_context(_THD)
#else
/**
MDL_context accessor
@param thd the current session
@return pointer to thd->mdl_context
*/
void *thd_mdl_context(MYSQL_THD thd);
#endif
#ifdef __cplusplus
}
#endif