Drizzled Public API Documentation

release_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 #include <plugin/user_locks/lock_storage.h>
24 
25 #include <string>
26 
27 namespace user_locks {
28 
30 {
31  drizzled::String *res= args[0]->val_str(&value);
32 
33  if (not res || not res->length())
34  {
35  my_error(drizzled::ER_USER_LOCKS_INVALID_NAME_LOCK, MYF(0));
36  return 0;
37  }
38  null_value= false;
39 
40  drizzled::identifier::user::ptr user_identifier(getSession().user());
41  drizzled::session_id_t id= getSession().getSessionId();
42  locks::return_t result;
43  {
44  boost::this_thread::restore_interruption dl(getSession().getThreadInterupt());
45  try {
46  result= user_locks::Locks::getInstance().release(Key(*user_identifier, res->c_str()), id);
47  }
48  catch(boost::thread_interrupted const& error)
49  {
50  my_error(drizzled::ER_QUERY_INTERRUPTED, MYF(0));
51  return 0;
52  }
53  }
54 
55  switch (result)
56  {
57  default:
58  case locks::SUCCESS:
59  {
60  user_locks::Storable *list= getSession().getProperty<user_locks::Storable>("user_locks");
61  assert(list);
62  if (list) // Just in case we ever blow the assert
63  list->erase(Key(*user_identifier, res->c_str()));
64 
65  return 1;
66  }
67  case locks::NOT_FOUND:
68  null_value= true;
69  return 0;
70  case locks::NOT_OWNED_BY:
71  my_error(drizzled::ER_USER_LOCKS_NOT_OWNER_OF_LOCK, MYF(0));
72  return 0;
73  }
74 }
75 
76 } /* namespace user_locks */