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 <drizzled/table/instance.h>
00024 
00025 namespace drizzled {
00026 
00027 namespace generator {
00028 class TableDefinitionCache;
00029 }
00030 
00031 namespace definition {
00032 
00033 class Cache
00034 {
00035 public:
00036   static inline Cache &singleton()
00037   {
00038     static Cache open_cache;
00039 
00040     return open_cache;
00041   }
00042 
00043   size_t size() const
00044   {
00045     return cache.size();
00046   }
00047 
00048   void rehash(size_t arg)
00049   {
00050     cache.rehash(arg);
00051   }
00052 
00053   table::instance::Shared::shared_ptr find(const identifier::Table::Key &identifier);
00054   void erase(const identifier::Table::Key &identifier);
00055   bool insert(const identifier::Table::Key &identifier, table::instance::Shared::shared_ptr share);
00056 
00057 protected:
00058   friend class drizzled::generator::TableDefinitionCache;
00059 
00060   void CopyFrom(table::instance::Shared::vector &vector);
00061 
00062 private:
00063   typedef boost::unordered_map< identifier::Table::Key, table::instance::Shared::shared_ptr> Map;
00064 
00065   Map cache;
00066   boost::mutex _mutex;
00067 };
00068 
00069 } /* namespace definition */
00070 } /* namespace drizzled */
00071