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(s1: l, s2: 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 | bool |
83 | is_less_than(const extended_type_info & /*rhs*/) const BOOST_OVERRIDE { |
84 | BOOST_ASSERT(false); |
85 | return false; |
86 | } |
87 | bool |
88 | is_equal(const extended_type_info & /*rhs*/) const BOOST_OVERRIDE { |
89 | BOOST_ASSERT(false); |
90 | return false; |
91 | } |
92 | const char * get_debug_info() const BOOST_OVERRIDE { |
93 | return get_key(); |
94 | } |
95 | void * construct(unsigned int /*count*/, ...) const BOOST_OVERRIDE { |
96 | BOOST_ASSERT(false); |
97 | return NULL; |
98 | } |
99 | void destroy(void const * const /*p*/) const BOOST_OVERRIDE { |
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() BOOST_OVERRIDE {} |
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(x: this); |
121 | } |
122 | |
123 | BOOST_SERIALIZATION_DECL void |
124 | extended_type_info::key_unregister() const{ |
125 | if(NULL == get_key()) |
126 | return; |
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()); |
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(x: this); |
134 | detail::ktmap::iterator end = x.upper_bound(x: this); |
135 | // remove entry in map which corresponds to this type |
136 | for(;start != end; ++start){ |
137 | if(this == *start){ |
138 | x.erase(position: 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(x: & 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 |
196 | |