MPD: system/EventFD.hxx Source File

MPD 0.20.18

EventFD.hxx
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1 /*
2 * Copyright 2003-2017 The Music Player Daemon Project
3 * http://www.musicpd.org
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (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 along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #ifndef MPD_EVENT_FD_HXX
21 #define MPD_EVENT_FD_HXX
22
23 #include "check.h"
24 #include "FileDescriptor.hxx"
25
31 class EventFD {
32 FileDescriptor fd;
33
34 public:
35 EventFD();
36 ~EventFD() {
37 fd.Close();
38 }
39
40 EventFD(const EventFD &other) = delete;
41 EventFD &operator=(const EventFD &other) = delete;
42
43 int Get() const {
44 return fd.Get();
45 }
46
51 bool Read();
52
57 void Write();
58 };
59
60 #endif
check.h
EventFD
A class that wraps eventfd().
Definition: EventFD.hxx:31
EventFD::operator=
EventFD & operator=(const EventFD &other)=delete
EventFD::Get
int Get() const
Definition: EventFD.hxx:43
FileDescriptor::Close
bool Close() noexcept
Close the file descriptor.
Definition: FileDescriptor.hxx:136
EventFD::~EventFD
~EventFD()
Definition: EventFD.hxx:36
EventFD::Read
bool Read()
Checks if Write() was called at least once since the last Read() call.
EventFD::EventFD
EventFD()
FileDescriptor
An OO wrapper for a UNIX file descriptor.
Definition: FileDescriptor.hxx:49
EventFD::Write
void Write()
Wakes up the reader.
FileDescriptor::Get
constexpr int Get() const
Returns the file descriptor.
Definition: FileDescriptor.hxx:69
FileDescriptor.hxx