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1 | /* |
2 | * Copyright Andrey Semashev 2016. | |
3 | * Distributed under the Boost Software License, Version 1.0. | |
4 | * (See accompanying file LICENSE_1_0.txt or copy at | |
5 | * http://www.boost.org/LICENSE_1_0.txt) | |
6 | */ | |
7 | /*! | |
8 | * \file open_mode.hpp | |
9 | * \author Andrey Semashev | |
10 | * \date 01.01.2016 | |
11 | * | |
12 | * The header defines resource opening modes. | |
13 | */ | |
14 | ||
15 | #ifndef BOOST_LOG_UTILITY_OPEN_MODE_HPP_INCLUDED_ | |
16 | #define BOOST_LOG_UTILITY_OPEN_MODE_HPP_INCLUDED_ | |
17 | ||
18 | #include <boost/log/detail/config.hpp> | |
19 | #include <boost/log/detail/header.hpp> | |
20 | ||
21 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
22 | #pragma once | |
23 | #endif | |
24 | ||
25 | namespace boost { | |
26 | ||
27 | BOOST_LOG_OPEN_NAMESPACE | |
28 | ||
29 | namespace open_mode { | |
30 | ||
31 | //! Create a new resource; fail if exists already | |
32 | struct create_only_tag {} const create_only = create_only_tag(); | |
33 | //! Opens an existing resource; fail if not exist | |
34 | struct open_only_tag {} const open_only = open_only_tag(); | |
35 | //! Creates a new resource or opens an existing one | |
36 | struct open_or_create_tag {} const open_or_create = open_or_create_tag(); | |
37 | ||
38 | } // namespace open_mode | |
39 | ||
40 | BOOST_LOG_CLOSE_NAMESPACE // namespace log | |
41 | ||
42 | } // namespace boost | |
43 | ||
44 | #include <boost/log/detail/footer.hpp> | |
45 | ||
46 | #endif // BOOST_LOG_UTILITY_OPEN_MODE_HPP_INCLUDED_ |