Drizzled Public API Documentation

get_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  int64_t wait_time= 0;
33 
34  if (arg_count == 2)
35  {
36  wait_time= args[1]->val_int();
37  }
38 
39  if (not res || not res->length())
40  {
41  my_error(drizzled::ER_USER_LOCKS_INVALID_NAME_LOCK, MYF(0));
42  return 0;
43  }
44  null_value= false;
45 
46  user_locks::Storable *list= getSession().getProperty<user_locks::Storable>("user_locks");
47  if (list) // To be compatible with MySQL, we will now release all other locks we might have.
48  list->erase_all();
49 
50  drizzled::identifier::user::ptr user_identifier(getSession().user());
51  {
52  boost::this_thread::restore_interruption dl(getSession().getThreadInterupt());
53 
54  try
55  {
56  if (not user_locks::Locks::getInstance().lock(getSession().getSessionId(), Key(*user_identifier, res->c_str()), wait_time))
57  return 0;
58  }
59  catch (boost::thread_interrupted const&)
60  {
61  my_error(drizzled::ER_QUERY_INTERRUPTED, MYF(0));
62  null_value= true;
63  return 0;
64  }
65  }
66  if (not list)
67  list= getSession().setProperty("user_locks", new user_locks::Storable(getSession().getSessionId()));
68  list->insert(Key(*user_identifier, res->c_str()));
69  return 1;
70 }
71 
72 } /* namespace user_locks */
int64_t val_int()
Definition: get_lock.cc:29
virtual int64_t val_int()=0
bool null_value
Definition: item.h:122
virtual String * val_str(String *str)=0