1 // libTorrent - BitTorrent library
2 // Copyright (C) 2005-2011, Jari Sundell
3 //
4 // This program is free software; you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation; either version 2 of the License, or
7 // (at your option) any later version.
8 //
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 // GNU General Public License for more details.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with this program; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
17 //
18 // In addition, as a special exception, the copyright holders give
19 // permission to link the code of portions of this program with the
20 // OpenSSL library under certain conditions as described in each
21 // individual source file, and distribute linked combinations
22 // including the two.
23 //
24 // You must obey the GNU General Public License in all respects for
25 // all of the code used other than OpenSSL.  If you modify file(s)
26 // with this exception, you may extend this exception to your version
27 // of the file(s), but you are not obligated to do so.  If you do not
28 // wish to do so, delete this exception statement from your version.
29 // If you delete this exception statement from all source files in the
30 // program, then also delete it here.
31 //
32 // Contact:  Jari Sundell <jaris@ifi.uio.no>
33 //
34 //           Skomakerveien 33
35 //           3185 Skoppum, NORWAY
36 
37 #ifndef LIBTORRENT_DATA_FILE_MANAGER_H
38 #define LIBTORRENT_DATA_FILE_MANAGER_H
39 
40 #include <vector>
41 #include <torrent/common.h>
42 
43 namespace torrent {
44 
45 class File;
46 
47 class LIBTORRENT_EXPORT FileManager : private std::vector<File*> {
48 public:
49   typedef std::vector<File*> base_type;
50   typedef uint32_t           size_type;
51 
52   using base_type::value_type;
53   using base_type::iterator;
54   using base_type::reverse_iterator;
55 
56   using base_type::begin;
57   using base_type::end;
58   using base_type::rbegin;
59   using base_type::rend;
60 
61   FileManager();
62   ~FileManager();
63 
open_files()64   size_type           open_files() const              { return base_type::size(); }
65 
max_open_files()66   size_type           max_open_files() const          { return m_maxOpenFiles; }
67   void                set_max_open_files(size_type s);
68 
69   bool                open(value_type file, int prot, int flags);
70   void                close(value_type file);
71 
72   void                close_least_active();
73 
74   // Statistics:
files_opened_counter()75   uint64_t            files_opened_counter() const { return m_filesOpenedCounter; }
files_closed_counter()76   uint64_t            files_closed_counter() const { return m_filesClosedCounter; }
files_failed_counter()77   uint64_t            files_failed_counter() const { return m_filesFailedCounter; }
78 
79 private:
80   FileManager(const FileManager&) LIBTORRENT_NO_EXPORT;
81   void operator = (const FileManager&) LIBTORRENT_NO_EXPORT;
82 
83   size_type           m_maxOpenFiles;
84 
85   uint64_t            m_filesOpenedCounter;
86   uint64_t            m_filesClosedCounter;
87   uint64_t            m_filesFailedCounter;
88 };
89 
90 }
91 
92 #endif
93