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drizzled/lock.h
 
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 
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 *
 
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 *  Copyright (C) 2008 Sun Microsystems
 
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 *
 
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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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 *
 
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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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 *
 
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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  02110-1301  USA
 
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 */
 
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#ifndef DRIZZLED_LOCK_H
 
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#define DRIZZLED_LOCK_H
 
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#include <mysys/definitions.h>
 
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class Session;
 
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class Table;
 
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class TableList;
 
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typedef struct st_mysql_lock DRIZZLE_LOCK;
 
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DRIZZLE_LOCK *mysql_lock_tables(Session *session, Table **table, uint32_t count,
 
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                                uint32_t flags, bool *need_reopen);
 
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/* mysql_lock_tables() and open_table() flags bits */
 
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#define DRIZZLE_LOCK_IGNORE_GLOBAL_READ_LOCK      0x0001
 
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#define DRIZZLE_LOCK_IGNORE_FLUSH                 0x0002
 
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#define DRIZZLE_LOCK_NOTIFY_IF_NEED_REOPEN        0x0004
 
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#define DRIZZLE_OPEN_TEMPORARY_ONLY               0x0008
 
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#define DRIZZLE_LOCK_IGNORE_GLOBAL_READ_ONLY      0x0010
 
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#define DRIZZLE_LOCK_PERF_SCHEMA                  0x0020
 
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void mysql_unlock_tables(Session *session, DRIZZLE_LOCK *sql_lock);
 
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void mysql_unlock_read_tables(Session *session, DRIZZLE_LOCK *sql_lock);
 
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void mysql_unlock_some_tables(Session *session, Table **table,uint32_t count);
 
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void mysql_lock_remove(Session *session, DRIZZLE_LOCK *locked,Table *table,
 
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                       bool always_unlock);
 
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void mysql_lock_abort(Session *session, Table *table, bool upgrade_lock);
 
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void mysql_lock_downgrade_write(Session *session, Table *table,
 
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                                thr_lock_type new_lock_type);
 
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bool mysql_lock_abort_for_thread(Session *session, Table *table);
 
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DRIZZLE_LOCK *mysql_lock_merge(DRIZZLE_LOCK *a,DRIZZLE_LOCK *b);
 
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TableList *mysql_lock_have_duplicate(Session *session, TableList *needle,
 
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                                      TableList *haystack);
 
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bool lock_global_read_lock(Session *session);
 
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void unlock_global_read_lock(Session *session);
 
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bool wait_if_global_read_lock(Session *session, bool abort_on_refresh,
 
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                              bool is_not_commit);
 
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void start_waiting_global_read_lock(Session *session);
 
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bool make_global_read_lock_block_commit(Session *session);
 
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bool set_protect_against_global_read_lock(void);
 
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void unset_protect_against_global_read_lock(void);
 
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void broadcast_refresh(void);
 
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int try_transactional_lock(Session *session, TableList *table_list);
 
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int check_transactional_lock(Session *session, TableList *table_list);
 
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int set_handler_table_locks(Session *session, TableList *table_list,
 
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                            bool transactional);
 
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/* Lock based on name */
 
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int lock_and_wait_for_table_name(Session *session, TableList *table_list);
 
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int lock_table_name(Session *session, TableList *table_list, bool check_in_use);
 
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void unlock_table_name(Session *session, TableList *table_list);
 
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bool wait_for_locked_table_names(Session *session, TableList *table_list);
 
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bool lock_table_names(Session *session, TableList *table_list);
 
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void unlock_table_names(Session *session, TableList *table_list,
 
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                        TableList *last_table);
 
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bool lock_table_names_exclusively(Session *session, TableList *table_list);
 
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bool is_table_name_exclusively_locked_by_this_thread(Session *session,
 
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                                                     TableList *table_list);
 
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bool is_table_name_exclusively_locked_by_this_thread(Session *session,
 
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                                                     unsigned char *key,
 
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                                                     int key_length);
 
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#endif /* DRIZZLED_LOCK_H */