Drizzled Public API Documentation

cache.h
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 #pragma once
22 
23 #include <boost/unordered_map.hpp>
24 #include <boost/shared_ptr.hpp>
25 
26 #include <drizzled/message.h>
27 #include <drizzled/identifier/table.h>
28 
29 namespace drizzled {
30 namespace message {
31 
32 class Cache
33 {
34 public:
35  static Cache &singleton()
36  {
37  static Cache open_cache;
38  return open_cache;
39  }
40 
41  size_t size() const
42  {
43  return cache.size();
44  }
45 
46  void rehash(size_t arg)
47  {
48  cache.rehash(arg);
49  }
50 
51  table::shared_ptr find(const identifier::Table &identifier);
52  void erase(const identifier::Table &identifier);
53  bool insert(const identifier::Table &identifier, table::shared_ptr share);
54  bool insert(const identifier::Table &identifier, Table &share);
55 private:
56  typedef boost::unordered_map<identifier::Table::Key, table::shared_ptr> Map;
57 
58  boost::mutex _access;
59  Map cache;
60 };
61 
62 } /* namespace message */
63 } /* namespace drizzled */
64