ghostfs/block_info.h at master · GhostFS/ghostfs · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
/*
  Ghost File System, or simply GhostFS
  Copyright (C) 2016 Raphael S. Carvalho

  This program can be distributed under the terms of the GNU GPL.
  See the file COPYING.
*/

#ifndef BLOCK_INFO_H
#define BLOCK_INFO_H

#include <boost/intrusive/unordered_set.hpp>
#include <boost/intrusive/list.hpp>

#include <mutex>

struct block_info;

namespace bi = boost::intrusive;

struct block {
    block_info* _info;
    char* _data;
    bi::list_member_hook<> _lru_link;

    block(block_info* info, char* data);

    block() = delete;
};

struct block_info {
    bool _present = false;
    block* _blk = nullptr;
    std::mutex _mtx;

    block_info() = default;
    block_info(block_info&&) {}

    void reset();

    void set_block(block *blk);
};

#endif // BLOCK_INFO_H