Disk ARchive  2.5.2
Full featured and portable backup and archiving tool
mem_sized.hpp
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00001 /*********************************************************************/
00002 // dar - disk archive - a backup/restoration program
00003 // Copyright (C) 2002-2052 Denis Corbin
00004 //
00005 // This program is free software; you can redistribute it and/or
00006 // modify it under the terms of the GNU General Public License
00007 // as published by the Free Software Foundation; either version 2
00008 // of the License, or (at your option) any later version.
00009 //
00010 // This program is distributed in the hope that it will be useful,
00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 // GNU General Public License for more details.
00014 //
00015 // You should have received a copy of the GNU General Public License
00016 // along with this program; if not, write to the Free Software
00017 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00018 //
00019 // to contact the author : http://dar.linux.free.fr/email.html
00020 /*********************************************************************/
00021 
00025 
00026 
00027 
00028 #ifndef MEM_SIZED_HPP
00029 #define MEM_SIZED_HPP
00030 
00031 #include "../my_config.h"
00032 #include "mem_allocator.hpp"
00033 #include "mem_cluster.hpp"
00034 #include <list>
00035 
00036 namespace libdar
00037 {
00038 
00039 
00042 
00043     class mem_sized : public mem_manager
00044     {
00045     public:
00046     mem_sized(U_I x_block_size);
00047     mem_sized(const mem_sized & ref) { throw SRC_BUG; };
00048     const mem_sized & operator = (const mem_sized & ref) { throw SRC_BUG; };
00049     ~mem_sized();
00050 
00056     void *alloc(mem_allocator * & ptr);
00057 
00059     bool is_empty() const;
00060 
00062     std::string dump() const;
00063 
00064 #ifdef LIBDAR_DEBUG_MEMORY
00065 
00067     U_I max_percent_full() const;
00068 #endif
00069 
00071     virtual void push_to_release_list(mem_allocator *ref);
00072 
00073     private:
00074     static const U_I average_table_size = 10240;
00075 
00076     U_I table_size_64;                                     //< size for clusters
00077     std::list<mem_cluster *> clusters;                     //< the list of owned mem_cluster objects
00078     std::list<mem_cluster *>::iterator next_free_in_table; //< points to an mem_cluster that is known to have free slots
00079     mem_cluster *pending_release;                          //< a totally free cluster that can be recycled if all others are full and a new block is requested or freed if another mem_cluster becomes also totally free
00080 #ifdef LIBDAR_DEBUG_MEMORY
00081     U_I sum_percent;   //< summ of all max percent usage obtained before deleting a mem_cluster object (used for statistical purposes)
00082     U_I num_cluster;   //< number of cluster which sum_percent has been collected from (sum_percent/num_cluster gives the average load of mem_clusters)
00083 #endif
00084     };
00085 
00087 
00088 } // end of namespace
00089 
00090 #endif
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