blob: e6cbacb9257d6345df6aea7a2f28ec5756563978 (
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
|
/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Badge.h>
#include <Kernel/Devices/CharacterDevice.h>
#include <Kernel/Locking/Mutex.h>
namespace Kernel {
class MasterPTY;
class PTYMultiplexer final : public CharacterDevice {
AK_MAKE_ETERNAL
public:
PTYMultiplexer();
virtual ~PTYMultiplexer() override;
static void initialize()
{
the();
}
static PTYMultiplexer& the();
// ^CharacterDevice
virtual KResultOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return 0; }
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return 0; }
virtual bool can_read(const OpenFileDescription&, size_t) const override { return true; }
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
void notify_master_destroyed(Badge<MasterPTY>, unsigned index);
// ^Device
virtual mode_t required_mode() const override { return 0666; }
virtual String device_name() const override { return "ptmx"; }
private:
// ^CharacterDevice
virtual StringView class_name() const override { return "PTYMultiplexer"; }
static constexpr size_t max_pty_pairs = 64;
MutexProtected<Vector<unsigned, max_pty_pairs>> m_freelist;
};
}
|
