MPD  0.20.15
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
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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();
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
A class that wraps eventfd().
Definition: EventFD.hxx:31
EventFD & operator=(const EventFD &other)=delete
int Get() const
Definition: EventFD.hxx:43
bool Close() noexcept
Close the file descriptor.
~EventFD()
Definition: EventFD.hxx:36
bool Read()
Checks if Write() was called at least once since the last Read() call.
An OO wrapper for a UNIX file descriptor.
void Write()
Wakes up the reader.
constexpr int Get() const
Returns the file descriptor.