backup_lock_service.h

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/* Copyright (c) 2017, 2023, Oracle and/or its affiliates.
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
 
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as designated in a particular file or component or in included license
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This program is distributed in the hope that it will be useful,
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License, version 2.0, for more details.
 
You should have received a copy of the GNU General Public License
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef BACKUP_LOCK_SERVICE_H
#define BACKUP_LOCK_SERVICE_H
#include <mysql/components/service.h>
#include <stddef.h>
 
/**
  Kind of Backup Lock to be acquired. In future we might
  want to have weaker kinds of Backup Lock (e.g. one that
  will allow concurrent TRUNCATE TABLE).
*/
 
typedef enum enum_backup_lock_service_lock_kind {
  BACKUP_LOCK_SERVICE_DEFAULT = 0
} backup_lock_service_lock_kind;
 
#ifdef __cplusplus
class THD;
#define MYSQL_THD THD *
#else
#define MYSQL_THD void *
#endif
 
DEFINE_SERVICE_HANDLE(Backup_lock_handle);
 
BEGIN_SERVICE_DEFINITION(mysql_backup_lock)
 
/**
  Service API to acquire shared Backup Lock.
 
  @param opaque_thd    Current thread context.
  @param lock_kind     Kind of lock to acquire - BACKUP_LOCK_SERVICE_DEFAULT
                       or weaker.
  @param lock_timeout  Number of seconds to wait before giving up.
 
  @return Operation status.
    @retval false Success
    @retval true  Failure
*/
 
DECLARE_BOOL_METHOD(acquire,
                    (MYSQL_THD, enum enum_backup_lock_service_lock_kind,
                     unsigned long /* lock_timeout*/));
 
/**
  Service API to release Backup Lock.
 
  @param opaque_thd    Current thread context.
 
  @return Operation status.
    @retval false Success
    @retval true  Failure
*/
 
DECLARE_BOOL_METHOD(release, (MYSQL_THD));
 
END_SERVICE_DEFINITION(mysql_backup_lock)
 
#endif /* BACKUP_LOCK_SERVICE_H */