blob: 65038d666e532f9a793c7e41c2c52c284de96445 (
plain)
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
|
/*
* 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 "MusicBuffer.hxx"
#include "MusicChunk.hxx"
#include <cassert>
MusicBuffer::MusicBuffer(unsigned num_chunks)
:buffer(num_chunks) {
}
MusicChunkPtr
MusicBuffer::Allocate() noexcept
{
const std::lock_guard<Mutex> protect(mutex);
return MusicChunkPtr(buffer.Allocate(), MusicChunkDeleter(*this));
}
void
MusicBuffer::Return(MusicChunk *chunk) noexcept
{
assert(chunk != nullptr);
/* these attributes need to be cleared before locking the
mutex, because they might recursively call this method,
causing a deadlock */
chunk->next.reset();
chunk->other.reset();
const std::lock_guard<Mutex> protect(mutex);
assert(!chunk->other || !chunk->other->other);
buffer.Free(chunk);
}
|
