| Disk ARchive 2.5.10 Full featured and portable backup and archiving tool

- Main Page
- Modules
- Namespaces
- Classes
- Files

- File List
- File Members

generic_thread.hpp
Go to the documentation of this file.
1 /*********************************************************************/
2 // dar - disk archive - a backup/restoration program
3 // Copyright (C) 2002-2052 Denis Corbin
4 //
5 // This program is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU General Public License
7 // as published by the Free Software Foundation; either version 2
8 // of the License, or (at your option) any later version.
9 //
10 // This program is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
14 //
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 //
19 // to contact the author : http://dar.linux.free.fr/email.html
20 /*********************************************************************/
21
26
27
28 #ifndef GENERIC_THREAD_HPP
29 #define GENERIC_THREAD_HPP
30
31 #include "../my_config.h"
32
33 #include "generic_file.hpp"
34 #include "messaging.hpp"
35 #include "slave_thread.hpp"
36 #include "erreurs.hpp"
37
38 namespace libdar
39 {
40
41
42 class generic_thread : public generic_file
43 {
44 public:
45 // default values for constuctor
46 static const unsigned int tampon_block_size = 102401;
47 static const unsigned int tampon_num_block = 1000;
48 static const unsigned int tampon_block_size_ctrl = 1024;
49 static const unsigned int tampon_num_block_ctrl = 10;
50
58 generic_thread(generic_file *ptr,
59 U_I data_block_size = tampon_block_size,
60 U_I data_num_block = tampon_num_block,
61 U_I ctrl_block_size = tampon_block_size_ctrl,
62 U_I ctrl_num_block = tampon_num_block_ctrl);
63 generic_thread(const generic_thread & ref); //< copy constructor is disabled (throws exception)
64 const generic_thread & operator = (const generic_thread & ref) { throw SRC_BUG; };
65 virtual ~generic_thread();
66
67 // inherited methods from generic_file
68
69 virtual bool skippable(skippability direction, const infinint & amount);
70 virtual bool skip(const infinint & pos);
71 virtual bool skip_to_eof();
72 virtual bool skip_relative(S_I x);
73 virtual infinint get_position() const;
74
75 protected:
76 // inherited from generic_file
77 virtual void inherited_read_ahead(const infinint & amount);
78 virtual U_I inherited_read(char *a, U_I size);
79 virtual void inherited_write(const char *a, U_I size);
80
85 virtual void inherited_sync_write();
86 virtual void inherited_flush_read();
87 virtual void inherited_terminate();
88
89
90 private:
91 libthreadar::fast_tampon<char> toslave_data;
92 libthreadar::fast_tampon<char> tomaster_data;
93 libthreadar::fast_tampon<char> toslave_ctrl;
94 libthreadar::fast_tampon<char> tomaster_ctrl;
95 slave_thread *remote;
96 bool reached_eof; //< whether we reached end of file
97 char data_header; //< contains 1 byte header for data
98 char data_header_eof; //< contains 1 byte header for data + eof
99 bool running; //< whether a remote is expected to run, tid is then set
100 pthread_t tid; //< thread id of remote
101
102 // the following variables are locally used in quite all methods
103 // they do not contain valuable information outside each method call
104 messaging_encode order;
105 messaging_decode answer;
106 unsigned int num;
107 char *ptr;
108 label dataname;
109
110 void send_order();
111 void read_answer(); //< \note ptr must be released/recycled after this call
112 void check_answer(msg_type expected);
113 void wake_up_slave_if_asked(); //< check whether an order to wakeup the slave has been received, and send wake up the slave
114 void release_block_answer() { tomaster_ctrl.fetch_recycle(ptr); ptr = nullptr; };
115 void release_data_ptr();
116 void purge_data_pipe(); //< drops all data in the toslave_data pipe
117 void my_run();
118 void my_join();
119 };
120
121 } // end of namespace
122
123 #endif
slave_thread.hpp
class slave_thread is runs a I/O operations on a given genercif_file in a separated thread ...
generic_file.hpp
class generic_file is defined here as well as class fichierthe generic_file interface is widely used ...
messaging.hpp
messaging_decode and messaging_encode are used to insert messages in a flow if data blocks ...
erreurs.hpp
contains all the excetion class thrown by libdar
libdar
libdar namespace encapsulate all libdar symbols
Definition: archive.hpp:47