Drizzled Public API Documentation

barrier_dictionary.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 
23 #include <plugin/user_locks/module.h>
24 
25 #include <drizzled/atomics.h>
26 #include <drizzled/session.h>
27 
28 using namespace drizzled;
29 using namespace std;
30 
31 namespace user_locks {
32 namespace barriers {
33 
34 UserBarriers::UserBarriers() :
35  plugin::TableFunction("DATA_DICTIONARY", "USER_DEFINED_BARRIERS")
36 {
37  add_field("USER_BARRIER_NAME", plugin::TableFunction::STRING, LARGEST_LOCK_NAME, false);
38  add_field("SESSION_ID", plugin::TableFunction::NUMBER, 0, false);
39  add_field("USER_NAME", plugin::TableFunction::STRING);
40  add_field("WAITER_LIMIT", plugin::TableFunction::NUMBER, 0, false);
41  add_field("GENERATION", plugin::TableFunction::NUMBER, 0, false);
42  add_field("WAITERS", plugin::TableFunction::NUMBER, 0, false);
43  add_field("OBSERVERS", plugin::TableFunction::NUMBER, 0, false);
44 }
45 
46 UserBarriers::Generator::Generator(drizzled::Field **arg) :
47  drizzled::plugin::TableFunction::Generator(arg)
48 {
49  Barriers::getInstance().Copy(barrier_map);
50  iter= barrier_map.begin();
51 }
52 
53 bool UserBarriers::Generator::populate()
54 {
55 
56  while (iter != barrier_map.end())
57  {
58  // USER_BARRIER_NAME
59  push(iter->first.getLockName());
60 
61  // SESSION_ID
62  push(iter->second->getOwner());
63 
64  // USER_NAME
65  push(iter->first.getUser());
66 
67  // WAITER_LIMIT
68  push(iter->second->getLimit());
69 
70  // GENERATION
71  push(iter->second->getGeneration());
72 
73  // WAITERS
74  push(iter->second->sizeWaiters());
75 
76  // OBSERVERS
77  push(iter->second->sizeObservers());
78 
79  iter++;
80  return true;
81  }
82 
83  return false;
84 }
85 
86 } /* namespace barriers */
87 } /* namespace user_locks */