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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 | { | |
82 | virtual bool | |
83 | is_less_than(const extended_type_info & /*rhs*/) const { | |
84 | BOOST_ASSERT(false); | |
85 | return false; | |
86 | }; | |
87 | virtual bool | |
88 | is_equal(const extended_type_info & /*rhs*/) const { | |
89 | BOOST_ASSERT(false); | |
90 | return false; | |
91 | }; | |
92 | virtual const char * get_debug_info() const { | |
93 | return get_key(); | |
94 | } | |
95 | virtual void * construct(unsigned int /*count*/, ...) const{ | |
96 | BOOST_ASSERT(false); | |
97 | return NULL; | |
98 | } | |
99 | virtual void destroy(void const * const /*p*/) const { | |
100 | BOOST_ASSERT(false); | |
101 | } | |
102 | public: | |
103 | extended_type_info_arg(const char * key) : | |
104 | extended_type_info(0, key) | |
105 | {} | |
106 | ||
107 | ~extended_type_info_arg(){ | |
108 | } | |
109 | }; | |
110 | ||
111 | #ifdef BOOST_MSVC | |
112 | # pragma warning(pop) | |
113 | #endif | |
114 | ||
115 | } // namespace detail | |
116 | ||
117 | BOOST_SERIALIZATION_DECL void | |
118 | extended_type_info::key_register() const{ | |
119 | if(NULL == get_key()) | |
120 | return; | |
121 | singleton<detail::ktmap>::get_mutable_instance().insert(this); | |
122 | } | |
123 | ||
124 | BOOST_SERIALIZATION_DECL void | |
125 | extended_type_info::key_unregister() const{ | |
126 | if(NULL == get_key()) | |
127 | return; | |
128 | if(! singleton<detail::ktmap>::is_destroyed()){ | |
129 | detail::ktmap & x = singleton<detail::ktmap>::get_mutable_instance(); | |
130 | detail::ktmap::iterator start = x.lower_bound(this); | |
131 | detail::ktmap::iterator end = x.upper_bound(this); | |
132 | // remove entry in map which corresponds to this type | |
133 | for(;start != end; ++start){ | |
134 | if(this == *start){ | |
135 | x.erase(start); | |
136 | break; | |
137 | } | |
138 | } | |
139 | } | |
140 | } | |
141 | ||
142 | BOOST_SERIALIZATION_DECL const extended_type_info * | |
143 | extended_type_info::find(const char *key) { | |
144 | BOOST_ASSERT(NULL != key); | |
145 | const detail::ktmap & k = singleton<detail::ktmap>::get_const_instance(); | |
146 | const detail::extended_type_info_arg eti_key(key); | |
147 | const detail::ktmap::const_iterator it = k.find(& eti_key); | |
148 | if(k.end() == it) | |
149 | return NULL; | |
150 | return *(it); | |
151 | } | |
152 | ||
153 | BOOST_SERIALIZATION_DECL | |
154 | extended_type_info::extended_type_info( | |
155 | const unsigned int type_info_key, | |
156 | const char * key | |
157 | ) : | |
158 | m_type_info_key(type_info_key), | |
159 | m_key(key) | |
160 | { | |
161 | } | |
162 | ||
163 | BOOST_SERIALIZATION_DECL | |
164 | extended_type_info::~extended_type_info(){ | |
165 | } | |
166 | ||
167 | BOOST_SERIALIZATION_DECL bool | |
168 | extended_type_info::operator<(const extended_type_info &rhs) const { | |
169 | // short cut for a common cases | |
170 | if(this == & rhs) | |
171 | return false; | |
172 | if(m_type_info_key == rhs.m_type_info_key){ | |
173 | return is_less_than(rhs); | |
174 | } | |
175 | if(m_type_info_key < rhs.m_type_info_key) | |
176 | return true; | |
177 | return false; | |
178 | } | |
179 | ||
180 | BOOST_SERIALIZATION_DECL bool | |
181 | extended_type_info::operator==(const extended_type_info &rhs) const { | |
182 | // short cut for a common cases | |
183 | if(this == & rhs) | |
184 | return true; | |
185 | if(m_type_info_key != rhs.m_type_info_key){ | |
186 | return false; | |
187 | } | |
188 | return is_equal(rhs); | |
189 | } | |
190 | ||
191 | } // namespace serialization | |
192 | } // namespace boost |