Drizzled Public API Documentation

is_used_lock.cc
1 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2010 Brian Aker
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <config.h>
22 #include <plugin/user_locks/module.h>
23 
24 #include <string>
25 
26 namespace user_locks {
27 
29 {
30  drizzled::String *res= args[0]->val_str(&value);
31 
32  if (not res || not res->length())
33  {
34  my_error(drizzled::ER_USER_LOCKS_INVALID_NAME_LOCK, MYF(0));
35  return 0;
36  }
37  null_value= false;
38 
39  drizzled::session_id_t id;
40  bool result= user_locks::Locks::getInstance().isUsed(Key(*getSession().user(), res->c_str()), id);
41 
42  if (not result)
43  {
44  null_value= true;
45  return id;
46  }
47 
48  return id;
49 }
50 
51 } /* namespace user_locks */