projects / ceph.git / blame
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|---|---|---|
| 7c673cae FG |
1 | ////////////////////////////////////////////////////////////////////////////// |
| 2 | // | |
| 3 | // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost | |
| 4 | // Software License, Version 1.0. (See accompanying file | |
| 5 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 6 | // | |
| 7 | // See http://www.boost.org/libs/interprocess for documentation. | |
| 8 | // | |
| 9 | ////////////////////////////////////////////////////////////////////////////// | |
| 10 | #ifndef BOOST_INTERPROCESS_NULL_INDEX_HPP | |
| 11 | #define BOOST_INTERPROCESS_NULL_INDEX_HPP | |
| 12 | ||
| 13 | #ifndef BOOST_CONFIG_HPP | |
| 14 | # include <boost/config.hpp> | |
| 15 | #endif | |
| 16 | # | |
| 17 | #if defined(BOOST_HAS_PRAGMA_ONCE) | |
| 18 | # pragma once | |
| 19 | #endif | |
| 20 | ||
| 21 | #include <boost/interprocess/detail/config_begin.hpp> | |
| 22 | #include <boost/interprocess/detail/workaround.hpp> | |
| 23 | ||
| 24 | #include <boost/interprocess/offset_ptr.hpp> | |
| 25 | ||
| 26 | //!\file | |
| 27 | //!Describes a null index adaptor, so that if we don't want to construct | |
| 28 | //!named objects, we can use this null index type to save resources. | |
| 29 | ||
| 30 | namespace boost { | |
| 31 | namespace interprocess { | |
| 32 | ||
| 33 | //!Null index type | |
| 34 | //!used to save compilation time when | |
| 35 | //!named indexes are not needed. | |
| 36 | template <class MapConfig> | |
| 37 | class null_index | |
| 38 | { | |
| 39 | #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) | |
| 40 | typedef typename MapConfig:: | |
| 41 | segment_manager_base segment_manager_base; | |
| 42 | #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED | |
| 43 | ||
| 44 | public: | |
| 45 | typedef int * iterator; | |
| 46 | typedef const int * const_iterator; | |
| 47 | ||
| 48 | //!begin() is equal | |
| 49 | //!to end() | |
| 50 | const_iterator begin() const | |
| 51 | { return const_iterator(0); } | |
| 52 | ||
| 53 | //!begin() is equal | |
| 54 | //!to end() | |
| 55 | iterator begin() | |
| 56 | { return iterator(0); } | |
| 57 | ||
| 58 | //!begin() is equal | |
| 59 | //!to end() | |
| 60 | const_iterator end() const | |
| 61 | { return const_iterator(0); } | |
| 62 | ||
| 63 | //!begin() is equal | |
| 64 | //!to end() | |
| 65 | iterator end() | |
| 66 | { return iterator(0); } | |
| 67 | ||
| 68 | //!Empty constructor | |
| 69 | null_index(segment_manager_base *){} | |
| 70 | }; | |
| 71 | ||
| 72 | }} //namespace boost { namespace interprocess { | |
| 73 | ||
| 74 | #include <boost/interprocess/detail/config_end.hpp> | |
| 75 | ||
| 76 | #endif //#ifndef BOOST_INTERPROCESS_NULL_INDEX_HPP |