Drizzled Public API Documentation

signal.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/barrier_storage.h>
24 
25 #include <string>
26 
27 namespace user_locks {
28 namespace barriers {
29 
30 int64_t Signal::val_int()
31 {
32  drizzled::String *res= args[0]->val_str(&value);
33 
34  if (res and res->length())
35  {
36  Barrier::shared_ptr barrier= Barriers::getInstance().find(Key(*getSession().user(), res->c_str()));
37 
38  if (barrier)
39  {
40  barrier->signal();
41  null_value= false;
42 
43  return 1;
44  }
45  }
46  else if (not res || not res->length())
47  {
48  my_error(drizzled::ER_USER_LOCKS_INVALID_NAME_BARRIER, MYF(0));
49  return 0;
50  }
51 
52  my_error(drizzled::ER_USER_LOCKS_UNKNOWN_BARRIER, MYF(0));
53  null_value= true;
54 
55  return 0;
56 }
57 
58 } /* namespace barriers */
59 } /* namespace user_locks */
bool null_value
Definition: item.h:122
virtual String * val_str(String *str)=0