Drizzled Public API Documentation

cache.h
00001 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2010 Brian Aker
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; either version 2 of the License, or
00009  *  (at your option) any later version.
00010  *
00011  *  This program is distributed in the hope that it will be useful,
00012  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *  GNU General Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU General Public License
00017  *  along with this program; if not, write to the Free Software
00018  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00019  */
00020 
00021 #pragma once
00022 
00023 #include <boost/unordered_map.hpp>
00024 #include <boost/shared_ptr.hpp>
00025 
00026 #include <drizzled/message.h>
00027 #include <drizzled/identifier/table.h>
00028 
00029 namespace drizzled {
00030 namespace message {
00031 
00032 class Cache
00033 {
00034 public:
00035   static Cache &singleton()
00036   {
00037     static Cache open_cache;
00038     return open_cache;
00039   }
00040 
00041   size_t size() const
00042   {
00043     return cache.size();
00044   }
00045 
00046   void rehash(size_t arg)
00047   {
00048     cache.rehash(arg);
00049   }
00050 
00051   table::shared_ptr find(const identifier::Table &identifier);
00052   void erase(const identifier::Table &identifier);
00053   bool insert(const identifier::Table &identifier, table::shared_ptr share);
00054   bool insert(const identifier::Table &identifier, Table &share);
00055 private:
00056   typedef boost::unordered_map<identifier::Table::Key, table::shared_ptr> Map;
00057 
00058   boost::mutex _access;
00059   Map cache;
00060 };
00061 
00062 } /* namespace message */
00063 } /* namespace drizzled */
00064