-
Notifications
You must be signed in to change notification settings - Fork 130
Expand file tree
/
Copy pathfile_mapping_test.cpp
More file actions
210 lines (187 loc) · 6.69 KB
/
file_mapping_test.cpp
File metadata and controls
210 lines (187 loc) · 6.69 KB
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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2004-2012. Distributed under 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)
//
// See http://www.boost.org/libs/interprocess for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#include <ios> //std::streamoff
#include <fstream> //std::ofstream, std::ifstream
#include <iostream>
#include <boost/interprocess/file_mapping.hpp>
#include <boost/interprocess/mapped_region.hpp>
#include <boost/container/vector.hpp>
#include <stdexcept> //std::exception
#include <cstddef> //std::size_t
#include "get_process_id_name.hpp"
using namespace boost::interprocess;
file_mapping get_file_mapping()
{
file_mapping f;
return file_mapping(boost::move(f));
}
int main ()
{
BOOST_INTERPROCESS_TRY{
const std::size_t FileSize = 99999*2;
{
{
std::ofstream file(get_filename().c_str(), std::ios::binary | std::ios::trunc);
}
{
//Create an empty file mapping
file_mapping mapping(get_filename().c_str(), read_write);
//Obtain zero file size
offset_t filesize = 5;
if(!mapping.get_size(filesize) || filesize != 0)
return 1;
//Check mapping of empty file does not work
bool thrown = false;
BOOST_INTERPROCESS_TRY{
mapped_region region (mapping, read_write);
}
BOOST_INTERPROCESS_CATCH(...){
thrown = true;
} BOOST_INTERPROCESS_CATCH_END
if(!thrown)
return file_mapping().swap(mapping), file_mapping::remove(get_filename().c_str()), 1;
thrown = false;
BOOST_INTERPROCESS_TRY{
mapped_region region (mapping, read_only);
}
BOOST_INTERPROCESS_CATCH(...){
thrown = true;
} BOOST_INTERPROCESS_CATCH_END
if(!thrown)
return file_mapping().swap(mapping), file_mapping::remove(get_filename().c_str()), 1;
}
file_mapping::remove(get_filename().c_str());
}
{
//Create file with given size
std::ofstream file(get_filename().c_str(), std::ios::binary | std::ios::trunc);
file.seekp(static_cast<std::streamoff>(FileSize-1));
file.write("", 1);
}
{
//Create a file mapping
file_mapping mapping(get_filename().c_str(), read_write);
//Create two mapped regions, one half of the file each
mapped_region region (mapping
,read_write
,0
,FileSize/2
);
mapped_region region2(mapping
,read_write
,FileSize/2
,FileSize - FileSize/2
);
//Fill two regions with a pattern
unsigned char *filler = static_cast<unsigned char*>(region.get_address());
for(std::size_t i = 0
;i < FileSize/2
;++i){
*filler++ = static_cast<unsigned char>(i);
}
filler = static_cast<unsigned char*>(region2.get_address());
for(std::size_t i = FileSize/2
;i < FileSize
;++i){
*filler++ = static_cast<unsigned char>(i);
}
if(!region.flush(0, 0, false)){
return 1;
}
if(!region2.flush(0, 0, true)){
return 1;
}
}
//See if the pattern is correct in the file
{
//Open the file
std::ifstream file(get_filename().c_str(), std::ios::binary);
//Create a memory buffer
boost::container::vector<unsigned char> memory(FileSize/2 +1);
//Fill buffer
file.read(static_cast<char*>(static_cast<void*>(memory.data()))
, FileSize/2);
unsigned char *checker = memory.data();
//Check pattern
for(std::size_t i = 0
;i < FileSize/2
;++i){
if(*checker++ != static_cast<unsigned char>(i)){
return 1;
}
}
//Fill buffer
file.read(static_cast<char*>(static_cast<void*>(memory.data()))
, FileSize - FileSize/2);
checker = memory.data();
//Check pattern
for(std::size_t i = FileSize/2
;i < FileSize
;++i){
if(*checker++ != static_cast<unsigned char>(i)){
return 1;
}
}
}
//Now check the pattern mapping a single read only mapped_region
{
//Create a file mapping
file_mapping mapping(get_filename().c_str(), read_only);
//Create a single regions, mapping all the file
mapped_region region (mapping
,read_only
);
//Check pattern
unsigned char *pattern = static_cast<unsigned char*>(region.get_address());
for(std::size_t i = 0
;i < FileSize
;++i, ++pattern){
if(*pattern != static_cast<unsigned char>(i)){
return 1;
}
}
}
#ifdef BOOST_INTERPROCESS_WCHAR_NAMED_RESOURCES
{
//Create a file mapping
file_mapping mapping(get_wfilename().c_str(), read_only);
//Create a single regions, mapping all the file
mapped_region region (mapping
,read_only
);
//Check pattern
unsigned char *pattern = static_cast<unsigned char*>(region.get_address());
for(std::size_t i = 0
;i < FileSize
;++i, ++pattern){
if(*pattern != static_cast<unsigned char>(i)){
return 1;
}
}
}
#endif //BOOST_INTERPROCESS_WCHAR_NAMED_RESOURCES
{
//Now test move semantics
file_mapping mapping(get_filename().c_str(), read_only);
file_mapping move_ctor(boost::move(mapping));
file_mapping move_assign;
move_assign = boost::move(move_ctor);
mapping.swap(move_assign);
file_mapping ret(get_file_mapping());
}
}
BOOST_INTERPROCESS_CATCH(std::exception &exc){
file_mapping::remove(get_filename().c_str());
std::cout << "Unexpected Exception: " << exc.what() << std::endl;
BOOST_INTERPROCESS_RETHROW
} BOOST_INTERPROCESS_CATCH_END
file_mapping::remove(get_filename().c_str());
return 0;
}