/* Copyright (c) 2013, 2018, MariaDB
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 */
#ifndef MYSQL_SERVICE_KILL_STATEMENT_INCLUDED
#define MYSQL_SERVICE_KILL_STATEMENT_INCLUDED
/**
@ file
This service provides functions that allow plugins to support
the KILL statement .
In MySQL support for the KILL statement is cooperative . The KILL
statement only sets a " killed " flag . This function returns the value
of that flag . A thread should check it often , especially inside
time - consuming loops , and gracefully abort the operation if it is
non - zero .
thd_killed ( thd )
@ return 0 - no KILL statement was issued , continue normally
@ return 1 - there was a KILL statement , abort the execution .
thd_kill_level ( thd )
@ return thd_kill_levels_enum values
*/
#ifdef __cplusplus
extern "C" {
#endif
enum thd_kill_levels {
THD_IS_NOT_KILLED=0 ,
THD_ABORT_SOFTLY=50 , /**< abort when possible, don't leave tables corrupted */
THD_ABORT_ASAP=100 , /**< abort asap */
};
extern struct kill_statement_service_st {
enum thd_kill_levels (*thd_kill_level_func)(const MYSQL_THD);
} *thd_kill_statement_service;
/* backward compatibility helper */
#define thd_killed(THD) (thd_kill_level(THD) == THD_ABORT_ASAP)
#ifdef MYSQL_DYNAMIC_PLUGIN
#define thd_kill_level(THD) \
thd_kill_statement_service->thd_kill_level_func(THD)
#else
enum thd_kill_levels thd_kill_level(const MYSQL_THD);
#endif
#ifdef __cplusplus
}
#endif
#endif
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