1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// test_plugin.cpp
// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// should pass compilation and execution
// Note this test creates, serializes, and destroys
// a class instance while knowing nothing more than its
// exported class ID (GUID) and a base class from which
// it is derived. This is referred to as a "plugin"
// since the same program could, without recompilation,
// manipulate any number of derived types - even those
// which have not been yet been created.
#include <fstream>
#include <cstdio> // remove
#include <boost/config.hpp>
#if defined(BOOST_NO_STDC_NAMESPACE)
namespace std{
using ::remove;
}
#endif
#include <boost/archive/archive_exception.hpp>
// for now, only test with simple text and polymorphic archive
#define BOOST_ARCHIVE_TEST polymorphic_text_archive.hpp
#include "test_tools.hpp"
#include <boost/archive/polymorphic_text_oarchive.hpp>
#include <boost/archive/polymorphic_text_iarchive.hpp>
#include <boost/serialization/base_object.hpp>
#include <boost/serialization/export.hpp>
#include <boost/serialization/type_info_implementation.hpp>
#include <boost/serialization/access.hpp>
#include <boost/serialization/void_cast.hpp>
#include <boost/serialization/extended_type_info.hpp>
#include "polymorphic_base.hpp"
// declare and implement a derived class in our own executable
class polymorphic_derived1 : public polymorphic_base
{
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive &ar, const unsigned int /* file_version */){
ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(polymorphic_base);
}
public:
virtual ~polymorphic_derived1(){}
};
BOOST_CLASS_EXPORT(polymorphic_derived1)
// MWerks users can do this to make their code work
BOOST_SERIALIZATION_MWERKS_BASE_AND_DERIVED(polymorphic_base, polymorphic_derived1)
// save exported polymorphic class
void save_exported(const char *testfile)
{
test_ostream os(testfile, TEST_STREAM_FLAGS);
test_oarchive oa(os, TEST_ARCHIVE_FLAGS);
polymorphic_base *rb1 = new polymorphic_derived1;
// get the eti record for the exported type "polymorphic_derived2"
boost::serialization::extended_type_info const * const d2_eti =
boost::serialization::extended_type_info::find(
"polymorphic_derived2"
);
assert(NULL != d2_eti);
// create a new instance of the type referred to by this record.
// in this example, we happen to know that the class constructor
// takes no arguments.
void const * const rd2 = d2_eti->construct();
assert(NULL != rd2);
// transform the pointer to a pointer to the base class
polymorphic_base const * const rb2
= static_cast<polymorphic_base const *>(
boost::serialization::void_upcast(
* d2_eti,
boost::serialization::type_info_implementation<polymorphic_base>
::type::get_const_instance(),
rd2
)
);
// export will permit correct serialization
// through a pointer to a base class
oa << BOOST_SERIALIZATION_NVP(rb1);
oa << BOOST_SERIALIZATION_NVP(rb2);
// don't need these any more - don't leak memory
delete rb1;
// note delete original handle - not runtime cast one !!!
d2_eti->destroy(rd2);
}
// save exported polymorphic class
void load_exported(const char *testfile)
{
test_istream is(testfile, TEST_STREAM_FLAGS);
test_iarchive ia(is, TEST_ARCHIVE_FLAGS);
polymorphic_base *rb1 = NULL;
polymorphic_base *rb2 = NULL;
// export will permit correct serialization
// through a pointer to a base class
ia >> BOOST_SERIALIZATION_NVP(rb1);
BOOST_CHECK_MESSAGE(
boost::serialization::type_info_implementation<polymorphic_derived1>
::type::get_const_instance()
==
* boost::serialization::type_info_implementation<polymorphic_base>
::type::get_const_instance().get_derived_extended_type_info(*rb1),
"restored pointer b1 not of correct type"
);
ia >> BOOST_SERIALIZATION_NVP(rb2);
// get the eti record for the exported type "polymorphic_derived2"
boost::serialization::extended_type_info const * const d2_eti =
boost::serialization::extended_type_info::find(
"polymorphic_derived2"
);
assert(NULL != d2_eti);
BOOST_CHECK_MESSAGE(
* d2_eti
==
* boost::serialization::type_info_implementation<polymorphic_base>
::type::get_const_instance().get_derived_extended_type_info(*rb2),
"restored pointer b2 not of correct type"
);
delete rb1;
delete rb2;
}
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
int
test_main( int /* argc */, char* /* argv */[] )
{
const char * testfile = boost::archive::tmpnam(NULL);
BOOST_REQUIRE(NULL != testfile);
HINSTANCE hDLL; // Handle to DLL
hDLL = LoadLibrary("dll_polymorphic_derived2.dll");
assert(0 != hDLL);
save_exported(testfile);
load_exported(testfile);
FreeLibrary(hDLL);
std::remove(testfile);
return EXIT_SUCCESS;
}
// EOF
|
