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1 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 |
2 | // extended_type_info.cpp: implementation for portable version of type_info | |
3 | ||
4 | // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . | |
5 | // Use, modification and distribution is subject to the Boost Software | |
6 | // License, Version 1.0. (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 for updates, documentation, and revision history. | |
10 | ||
11 | #if (defined _MSC_VER) && (_MSC_VER == 1200) | |
12 | # pragma warning (disable : 4786) // too long name, harmless warning | |
13 | #endif | |
14 | ||
15 | #include <algorithm> | |
16 | #include <set> | |
17 | #include <utility> | |
18 | #include <boost/assert.hpp> | |
19 | #include <cstddef> // NULL | |
20 | ||
21 | #include <cstring> | |
22 | #if defined(BOOST_NO_STDC_NAMESPACE) | |
23 | namespace std{ using ::strcmp; } | |
24 | #endif | |
25 | ||
26 | #include <boost/config.hpp> // msvc needs this to suppress warning | |
27 | ||
28 | #include <boost/core/no_exceptions_support.hpp> | |
29 | ||
30 | // it marks our code with proper attributes as being exported when | |
31 | // we're compiling it while marking it import when just the headers | |
32 | // is being included. | |
33 | #define BOOST_SERIALIZATION_SOURCE | |
34 | #include <boost/serialization/config.hpp> | |
35 | #include <boost/serialization/singleton.hpp> | |
36 | #include <boost/serialization/force_include.hpp> | |
37 | #include <boost/serialization/extended_type_info.hpp> | |
38 | ||
39 | #ifdef BOOST_MSVC | |
40 | # pragma warning(push) | |
41 | # pragma warning(disable : 4511 4512) | |
42 | #endif | |
43 | ||
44 | namespace boost { | |
45 | namespace serialization { | |
46 | namespace detail { | |
47 | ||
48 | struct key_compare | |
49 | { | |
50 | bool | |
51 | operator()( | |
52 | const extended_type_info * lhs, | |
53 | const extended_type_info * rhs | |
54 | ) const { | |
55 | // performance shortcut | |
56 | if(lhs == rhs) | |
57 | return false; | |
58 | const char * l = lhs->get_key(); | |
59 | BOOST_ASSERT(NULL != l); | |
60 | const char * r = rhs->get_key(); | |
61 | BOOST_ASSERT(NULL != r); | |
62 | // performance shortcut | |
63 | // shortcut to exploit string pooling | |
64 | if(l == r) | |
65 | return false; | |
66 | // for exported types, use the string key so that | |
67 | // multiple instances in different translation units | |
68 | // can be matched up | |
69 | return std::strcmp(l, r) < 0; | |
70 | } | |
71 | }; | |
72 | ||
73 | typedef std::multiset<const extended_type_info *, key_compare> ktmap; | |
74 | ||
75 | #ifdef BOOST_MSVC | |
76 | # pragma warning(push) | |
77 | # pragma warning(disable : 4511 4512) | |
78 | #endif | |
79 | ||
80 | class extended_type_info_arg : public extended_type_info | |
81 | { | |
20effc67 TL |
82 | bool |
83 | is_less_than(const extended_type_info & /*rhs*/) const BOOST_OVERRIDE { | |
7c673cae FG |
84 | BOOST_ASSERT(false); |
85 | return false; | |
20effc67 TL |
86 | } |
87 | bool | |
88 | is_equal(const extended_type_info & /*rhs*/) const BOOST_OVERRIDE { | |
7c673cae FG |
89 | BOOST_ASSERT(false); |
90 | return false; | |
20effc67 TL |
91 | } |
92 | const char * get_debug_info() const BOOST_OVERRIDE { | |
7c673cae FG |
93 | return get_key(); |
94 | } | |
20effc67 | 95 | void * construct(unsigned int /*count*/, ...) const BOOST_OVERRIDE { |
7c673cae FG |
96 | BOOST_ASSERT(false); |
97 | return NULL; | |
98 | } | |
20effc67 | 99 | void destroy(void const * const /*p*/) const BOOST_OVERRIDE { |
7c673cae FG |
100 | BOOST_ASSERT(false); |
101 | } | |
102 | public: | |
103 | extended_type_info_arg(const char * key) : | |
104 | extended_type_info(0, key) | |
105 | {} | |
106 | ||
20effc67 | 107 | ~extended_type_info_arg() BOOST_OVERRIDE {} |
7c673cae FG |
108 | }; |
109 | ||
110 | #ifdef BOOST_MSVC | |
111 | # pragma warning(pop) | |
112 | #endif | |
113 | ||
114 | } // namespace detail | |
115 | ||
116 | BOOST_SERIALIZATION_DECL void | |
117 | extended_type_info::key_register() const{ | |
118 | if(NULL == get_key()) | |
119 | return; | |
120 | singleton<detail::ktmap>::get_mutable_instance().insert(this); | |
121 | } | |
122 | ||
123 | BOOST_SERIALIZATION_DECL void | |
124 | extended_type_info::key_unregister() const{ | |
125 | if(NULL == get_key()) | |
126 | return; | |
92f5a8d4 TL |
127 | // note: it's been discovered that at least one platform is not guaranteed |
128 | // to destroy singletons reverse order of construction. So we can't | |
129 | // use a runtime assert here. Leave this in a reminder not to do this! | |
130 | // BOOST_ASSERT(! singleton<detail::ktmap>::is_destroyed()); | |
7c673cae FG |
131 | if(! singleton<detail::ktmap>::is_destroyed()){ |
132 | detail::ktmap & x = singleton<detail::ktmap>::get_mutable_instance(); | |
133 | detail::ktmap::iterator start = x.lower_bound(this); | |
134 | detail::ktmap::iterator end = x.upper_bound(this); | |
135 | // remove entry in map which corresponds to this type | |
136 | for(;start != end; ++start){ | |
137 | if(this == *start){ | |
138 | x.erase(start); | |
139 | break; | |
140 | } | |
141 | } | |
142 | } | |
143 | } | |
144 | ||
145 | BOOST_SERIALIZATION_DECL const extended_type_info * | |
146 | extended_type_info::find(const char *key) { | |
147 | BOOST_ASSERT(NULL != key); | |
148 | const detail::ktmap & k = singleton<detail::ktmap>::get_const_instance(); | |
149 | const detail::extended_type_info_arg eti_key(key); | |
150 | const detail::ktmap::const_iterator it = k.find(& eti_key); | |
151 | if(k.end() == it) | |
152 | return NULL; | |
153 | return *(it); | |
154 | } | |
155 | ||
156 | BOOST_SERIALIZATION_DECL | |
157 | extended_type_info::extended_type_info( | |
158 | const unsigned int type_info_key, | |
159 | const char * key | |
160 | ) : | |
161 | m_type_info_key(type_info_key), | |
162 | m_key(key) | |
163 | { | |
164 | } | |
165 | ||
166 | BOOST_SERIALIZATION_DECL | |
167 | extended_type_info::~extended_type_info(){ | |
168 | } | |
169 | ||
170 | BOOST_SERIALIZATION_DECL bool | |
171 | extended_type_info::operator<(const extended_type_info &rhs) const { | |
172 | // short cut for a common cases | |
173 | if(this == & rhs) | |
174 | return false; | |
175 | if(m_type_info_key == rhs.m_type_info_key){ | |
176 | return is_less_than(rhs); | |
177 | } | |
178 | if(m_type_info_key < rhs.m_type_info_key) | |
179 | return true; | |
180 | return false; | |
181 | } | |
182 | ||
183 | BOOST_SERIALIZATION_DECL bool | |
184 | extended_type_info::operator==(const extended_type_info &rhs) const { | |
185 | // short cut for a common cases | |
186 | if(this == & rhs) | |
187 | return true; | |
188 | if(m_type_info_key != rhs.m_type_info_key){ | |
189 | return false; | |
190 | } | |
191 | return is_equal(rhs); | |
192 | } | |
193 | ||
194 | } // namespace serialization | |
195 | } // namespace boost |