#ifndef LOCK_INCLUDED
#define LOCK_INCLUDED

#include "thr_lock.h"                           /* thr_lock_type */
#include "mdl.h"

// Forward declarations
struct TABLE;
struct TABLE_LIST;
class THD;
typedef struct st_mysql_lock MYSQL_LOCK;


MYSQL_LOCK *mysql_lock_tables(THD *thd, TABLE **table, uint count, uint flags);
bool mysql_lock_tables(THD *thd, MYSQL_LOCK *sql_lock, uint flags);
void mysql_unlock_tables(THD *thd, MYSQL_LOCK *sql_lock, bool free_lock= 1);
void mysql_unlock_read_tables(THD *thd, MYSQL_LOCK *sql_lock);
void mysql_unlock_some_tables(THD *thd, TABLE **table,uint count);
void mysql_lock_remove(THD *thd, MYSQL_LOCK *locked,TABLE *table);
void mysql_lock_abort(THD *thd, TABLE *table, bool upgrade_lock);
bool mysql_lock_abort_for_thread(THD *thd, TABLE *table);
MYSQL_LOCK *mysql_lock_merge(MYSQL_LOCK *a,MYSQL_LOCK *b);
/* Lock based on name */
bool lock_schema_name(THD *thd, const char *db);
/* Lock based on stored routine name */
bool lock_object_name(THD *thd, MDL_key::enum_mdl_namespace mdl_type,
                      const char *db, const char *name);

/* flags for get_lock_data */
#define GET_LOCK_UNLOCK         1
#define GET_LOCK_STORE_LOCKS    2

MYSQL_LOCK *get_lock_data(THD *thd, TABLE **table_ptr, uint count, uint flags);
void reset_lock_data(MYSQL_LOCK *sql_lock, bool unlock);

#endif /* LOCK_INCLUDED */