pipe.h
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1 /*
2  * Copyright (C) 2007 Tommi Maekitalo
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * As a special exception, you may use this file as part of a free
10  * software library without restriction. Specifically, if other files
11  * instantiate templates or use macros or inline functions from this
12  * file, or you compile this file and link it with other files to
13  * produce an executable, this file does not by itself cause the
14  * resulting executable to be covered by the GNU General Public
15  * License. This exception does not however invalidate any other
16  * reasons why the executable file might be covered by the GNU Library
17  * General Public License.
18  *
19  * This library is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22  * Lesser General Public License for more details.
23  *
24  * You should have received a copy of the GNU Lesser General Public
25  * License along with this library; if not, write to the Free Software
26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27  */
28 
29 #ifndef CXXTOOLS_PIPE_H
30 #define CXXTOOLS_PIPE_H
31 
32 #include <cxxtools/noncopyable.h>
33 #include <cxxtools/iodevice.h>
34 #include <unistd.h>
35 
36 namespace cxxtools
37 {
38  class PipeImpl;
39 
40 class Pipe : private NonCopyable
41 {
42  private:
43  class PipeImpl* _impl;
44 
45  protected:
46  PipeImpl* impl() { return _impl; }
47  const PipeImpl* impl() const { return _impl; }
48 
49  public:
50  typedef int OpenMode;
51 
52  static const int Sync = 0;
53  static const int Async = 1;
54 
60  explicit Pipe(OpenMode mode = Sync);
61 
66  ~Pipe();
67 
72  IODevice& out();
73 
74  const IODevice& out() const;
75 
80  IODevice& in();
81 
82  const IODevice& in() const;
83 
84  size_t write(const char* buf, size_t count)
85  {
86  return in().write(buf, count);
87  }
88 
89  void write(char ch)
90  {
91  in().write(&ch, 1);
92  }
93 
94  size_t read(char* buf, size_t count)
95  {
96  return out().read(buf, count);
97  }
98 
99  char read()
100  {
101  char ch;
102  out().read(&ch, 1);
103  return ch;
104  }
105 
106 };
107 
108 }
109 
110 #endif // CXXTOOLS_PIPE_H