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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
/*
* Copyright 2003-2020 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "Stream.hxx"
CacheInputStream::CacheInputStream(InputCacheLease _lease,
Mutex &_mutex) noexcept
:InputStream(_lease->GetUri(), _mutex),
InputCacheLease(std::move(_lease))
{
auto &i = GetCacheItem();
size = i.size();
seekable = true;
SetReady();
}
void
CacheInputStream::Check()
{
const ScopeUnlock unlock(mutex);
auto &i = GetCacheItem();
const std::lock_guard<Mutex> protect(i.mutex);
i.Check();
}
void
CacheInputStream::Seek(std::unique_lock<Mutex> &, offset_type new_offset)
{
offset = new_offset;
}
bool
CacheInputStream::IsEOF() const noexcept
{
return offset == size;
}
bool
CacheInputStream::IsAvailable() const noexcept
{
const auto _offset = offset;
const ScopeUnlock unlock(mutex);
auto &i = GetCacheItem();
const std::lock_guard<Mutex> protect(i.mutex);
return i.IsAvailable(_offset);
}
size_t
CacheInputStream::Read(std::unique_lock<Mutex> &lock,
void *ptr, size_t read_size)
{
const auto _offset = offset;
auto &i = GetCacheItem();
size_t nbytes;
{
const ScopeUnlock unlock(mutex);
const std::lock_guard<Mutex> protect(i.mutex);
nbytes = i.Read(lock, _offset, ptr, read_size);
}
offset += nbytes;
return nbytes;
}
void
CacheInputStream::OnInputCacheAvailable() noexcept
{
auto &i = GetCacheItem();
const ScopeUnlock unlock(i.mutex);
const std::lock_guard<Mutex> protect(mutex);
InvokeOnAvailable();
}