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1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // | |
3 | // (C) Copyright Ion Gaztanaga 2014-2014 | |
4 | // | |
5 | // Distributed under the Boost Software License, Version 1.0. | |
6 | // (See accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | // | |
9 | // See http://www.boost.org/libs/intrusive for documentation. | |
10 | // | |
11 | ///////////////////////////////////////////////////////////////////////////// | |
12 | ||
13 | #ifndef BOOST_INTRUSIVE_DETAIL_ARRAY_INITIALIZER_HPP | |
14 | #define BOOST_INTRUSIVE_DETAIL_ARRAY_INITIALIZER_HPP | |
15 | ||
16 | #ifndef BOOST_CONFIG_HPP | |
17 | # include <boost/config.hpp> | |
18 | #endif | |
19 | ||
20 | #if defined(BOOST_HAS_PRAGMA_ONCE) | |
21 | # pragma once | |
22 | #endif | |
23 | ||
24 | #include <boost/config.hpp> | |
25 | #include <boost/core/no_exceptions_support.hpp> | |
26 | ||
27 | namespace boost { | |
28 | namespace intrusive { | |
29 | namespace detail { | |
30 | ||
31 | //This is not standard, but should work with all compilers | |
32 | union max_align | |
33 | { | |
34 | char char_; | |
35 | short short_; | |
36 | int int_; | |
37 | long long_; | |
38 | #ifdef BOOST_HAS_LONG_LONG | |
39 | ::boost::long_long_type long_long_; | |
40 | #endif | |
41 | float float_; | |
42 | double double_; | |
43 | long double long_double_; | |
44 | void * void_ptr_; | |
45 | }; | |
46 | ||
47 | template<class T, std::size_t N> | |
48 | class array_initializer | |
49 | { | |
50 | public: | |
51 | template<class CommonInitializer> | |
52 | array_initializer(const CommonInitializer &init) | |
53 | { | |
54 | char *init_buf = (char*)rawbuf; | |
55 | std::size_t i = 0; | |
56 | BOOST_TRY{ | |
57 | for(; i != N; ++i){ | |
58 | new(init_buf)T(init); | |
59 | init_buf += sizeof(T); | |
60 | } | |
61 | } | |
62 | BOOST_CATCH(...){ | |
63 | while(i--){ | |
64 | init_buf -= sizeof(T); | |
65 | ((T*)init_buf)->~T(); | |
66 | } | |
67 | BOOST_RETHROW; | |
68 | } | |
69 | BOOST_CATCH_END | |
70 | } | |
71 | ||
72 | operator T* () | |
73 | { return (T*)(rawbuf); } | |
74 | ||
75 | operator const T*() const | |
76 | { return (const T*)(rawbuf); } | |
77 | ||
78 | ~array_initializer() | |
79 | { | |
80 | char *init_buf = (char*)rawbuf + N*sizeof(T); | |
81 | for(std::size_t i = 0; i != N; ++i){ | |
82 | init_buf -= sizeof(T); | |
83 | ((T*)init_buf)->~T(); | |
84 | } | |
85 | } | |
86 | ||
87 | private: | |
88 | detail::max_align rawbuf[(N*sizeof(T)-1)/sizeof(detail::max_align)+1]; | |
89 | }; | |
90 | ||
91 | } //namespace detail{ | |
92 | } //namespace intrusive{ | |
93 | } //namespace boost{ | |
94 | ||
95 | #endif //BOOST_INTRUSIVE_DETAIL_ARRAY_INITIALIZER_HPP |