GCC Code Coverage Report

Directory: ./
File: include/shared_memory/shared_memory.hxx
Date: 2022-06-30 06:29:57
Exec Total Coverage
Lines: 108 124 87.1%
Branches: 215 678 31.7%
Line Branch Exec Source
1 /**
2 * @file shared_memory.hxx
3 * @author Vincent Berenz
4 * @author Maximilien Naveau (maximilien.naveau@gmail.com)
5 * @license License BSD-3-Clause
6 * @copyright Copyright (c) 2019, New York University and Max Planck
7 * Gesellschaft.
8 * @date 2019-05-22
9 *
10 * @brief This file implements the functions from shared_memory.hpp that
11 * encapsulate the use of the shared memory using the boost::interprocess
12 * package. usage: see demos and unit tests and documentation
13 */
14
15 #pragma once
16
17 #include <shared_memory/shared_memory.hpp>
18
19 namespace shared_memory
20 {
21 // value will change with called
22 // to shared_memory::set_verbose
23 // used to turn off print console
24 // in code below
25 extern bool VERBOSE;
26
27 /***********************************************
28 * Definition of the SharedMemorySegment class *
29 ***********************************************/
30 template <typename ElemType>
31 8848 void SharedMemorySegment::get_object(const std::string& object_id,
32 std::pair<ElemType*, std::size_t>& get_)
33 {
34 boost::interprocess::scoped_lock<boost::interprocess::interprocess_mutex>
35
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 17696 lock(*mutex_);
36
37 // register_object(object_id, get_);
38
39
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 8848 bool registered = register_object_read_only<ElemType>(object_id);
40
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 8848 if (objects_[object_id].second != get_.second)
41 {
42
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 1 delete_object<ElemType>(object_id);
43 throw shared_memory::Unexpected_size_exception(
44
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 1 segment_id_, object_id, objects_[object_id].second, get_.second);
45 }
46
47
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 8847 if (registered && VERBOSE)
48 {
49 ✗ std::cout << "shared_memory::SharedMemoryObject | registration of "
50 ✗ << object_id << " of size " << get_.second << std::endl;
51 }
52
53
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 8847 ElemType* shared_data = static_cast<ElemType*>(objects_[object_id].first);
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 8847 std::size_t shared_data_size = objects_[object_id].second;
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 40261 for (std::size_t i = 0; i < shared_data_size; ++i)
56 {
57
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 31414 get_.first[i] = shared_data[i];
58 }
59 8847 }
60
61 template <typename ElemType>
62 10097 void SharedMemorySegment::set_object(
63 const std::string& object_id,
64 const std::pair<const ElemType*, std::size_t>& set_)
65 {
66 boost::interprocess::scoped_lock<boost::interprocess::interprocess_mutex>
67
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 20194 lock(*mutex_);
68
69
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 10097 bool registered = register_object(object_id, set_);
70
71
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 10095 if (registered && VERBOSE)
72 {
73 ✗ std::cout << "shared_memory::SharedMemoryObject | registration of "
74 ✗ << object_id << " of size " << objects_[object_id].second
75 << std::endl;
76 }
77
78
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 10095 ElemType* shared_data = static_cast<ElemType*>(objects_[object_id].first);
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 10095 std::size_t shared_data_size = objects_[object_id].second;
80
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 50345 for (std::size_t i = 0; i < shared_data_size; ++i)
81 {
82
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 40250 shared_data[i] = set_.first[i];
83 }
84 10095 }
85
86 template <typename ElemType>
87 10097 bool SharedMemorySegment::register_object(
88 const std::string& object_id, const std::pair<ElemType*, std::size_t>& obj_)
89 {
90
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 10097 if (is_object_registered(object_id))
91 {
92 10032 return false;
93 }
94 65 std::size_t obj_size = 0;
95 65 typename std::remove_const<ElemType>::type* obj_ptr = nullptr;
96
97
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 65 obj_ptr =
98 segment_manager_
99 .find_or_construct<typename std::remove_const<ElemType>::type>(
100
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 130 object_id.c_str())[obj_.second]();
101 63 obj_size = obj_.second;
102
103
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 63 objects_[object_id] = std::pair<void*, std::size_t>();
104 63 objects_[object_id].first = static_cast<void*>(obj_ptr);
105 63 objects_[object_id].second = obj_size;
106
107 63 return true;
108 }
109
110 template <typename ElemType>
111 8851 bool SharedMemorySegment::register_object_read_only(
112 const std::string& object_id)
113 {
114
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 8851 if (is_object_registered(object_id))
115 {
116 8833 return false;
117 }
118
119 18 std::size_t obj_size = 0;
120 18 typename std::remove_const<ElemType>::type* obj_ptr = nullptr;
121
122 std::pair<typename std::remove_const<ElemType>::type*, std::size_t>
123
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 18 obj_pair =
124 segment_manager_.find<typename std::remove_const<ElemType>::type>(
125 object_id.c_str());
126 18 obj_ptr = obj_pair.first;
127 18 obj_size = obj_pair.second;
128
129
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 18 objects_[object_id] = std::pair<void*, std::size_t>();
130
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 18 objects_[object_id].first = static_cast<void*>(obj_ptr);
131
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 18 objects_[object_id].second = obj_size;
132
133 18 return true;
134 }
135
136 template <typename ElemType>
137 1 void SharedMemorySegment::delete_object(const std::string& object_id)
138 {
139 try
140 {
141
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 1 if (objects_.count(object_id) != 0)
142 {
143
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 1 objects_.erase(object_id);
144 }
145
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 1 segment_manager_.destroy<ElemType>(object_id.c_str());
146 }
147 ✗ catch (const boost::interprocess::interprocess_exception&)
148 {
149 ✗ return;
150 }
151 }
152
153 /*************************************************
154 * Definition of all segment management function *
155 *************************************************/
156
157 /**
158 * @brief SegmentMap typedef is a simple short cut to the GLOBAL_SHM_SEGMENTS
159 * type.
160 */
161 typedef std::map<std::string, std::unique_ptr<SharedMemorySegment> > SegmentMap;
162
163 /**
164 * @brief GLOBAL_SHARED_MEMORY_SEGMENT is global variable that acts as a
165 * a shared memory manager.
166 *
167 * The use of the std::unique_ptr allows to delete the object and re-create
168 * at will.
169 */
170 378 static SegmentMap GLOBAL_SHM_SEGMENTS;
171
172 template <typename ElemType>
173 bool delete_object(const std::string& segment_id, const std::string& object_id)
174 {
175 try
176 {
177 SharedMemorySegment& segment = get_segment(segment_id);
178 segment.delete_object<ElemType>(object_id);
179 }
180 catch (const boost::interprocess::interprocess_exception&)
181 {
182 return false;
183 }
184 }
185
186 /***********************************
187 * Definition of all set functions *
188 ***********************************/
189
190 template <typename ElemType>
191 59 void set(const std::string& segment_id,
192 const std::string& object_id,
193 const ElemType& set_)
194 {
195 try
196 {
197
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 59 SharedMemorySegment& segment = get_segment(segment_id);
198 59 std::pair<const ElemType*, std::size_t> set_ref;
199 59 set_ref.first = &set_;
200 59 set_ref.second = 1;
201
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 59 segment.set_object<ElemType>(object_id, set_ref);
202 }
203 ✗ catch (const boost::interprocess::bad_alloc&)
204 {
205 ✗ throw shared_memory::Allocation_exception(segment_id, object_id);
206 }
207
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 59 }
208
209 template <typename ElemType>
210 10038 void set(const std::string& segment_id,
211 const std::string& object_id,
212 const ElemType* set_,
213 const std::size_t size)
214 {
215 try
216 {
217
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 10038 SharedMemorySegment& segment = get_segment(segment_id);
218 10038 std::pair<const ElemType*, std::size_t> set_ref;
219 10038 set_ref.first = set_;
220 10038 set_ref.second = size;
221
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 10038 segment.set_object<ElemType>(object_id, set_ref);
222 }
223 4 catch (const boost::interprocess::bad_alloc&)
224 {
225
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 2 throw shared_memory::Allocation_exception(segment_id, object_id);
226 }
227
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 10036 }
228
229 template <typename VectorType, typename ElemType>
230 void set(const std::string& segment_id,
231 const std::string& object_id,
232 const VectorType& set_)
233 {
234 set<ElemType>(segment_id, object_id, set_.data(), set_.size());
235 }
236
237 template <typename ElemType>
238 7 void set(const std::string& segment_id,
239 const std::string& object_id,
240 const std::vector<ElemType>& set_)
241 {
242 7 set<ElemType>(segment_id, object_id, set_.data(), set_.size());
243 5 }
244
245 template <typename ElemType>
246 2 void set(const std::string& segment_id,
247 const std::string& object_id,
248 const Eigen::Matrix<ElemType, Eigen::Dynamic, 1>& set_)
249 {
250 2 set<ElemType>(segment_id, object_id, set_.data(), set_.size());
251 2 }
252
253 template <typename FirstType, typename SecondType>
254 void set(const std::string& segment_id,
255 const std::string& object_id,
256 const std::pair<FirstType, SecondType>& set_)
257 {
258 set<FirstType>(segment_id, object_id + "_first", set_.first);
259 set<SecondType>(segment_id, object_id + "_second", set_.second);
260 }
261
262 template <typename KeyType, typename ValueType>
263 4 void set(const std::string& segment_id,
264 const std::string& object_id,
265 const std::map<KeyType, ValueType>& set_)
266 {
267 try
268 {
269 4 int i = 0;
270 12 for (typename std::map<KeyType, ValueType>::const_iterator map_it =
271 set_.begin();
272
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 12 map_it != set_.end();
273 ++map_it)
274 {
275
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 8 set(segment_id,
276 object_id + "_" + std::to_string(i),
277 8 map_it->second);
278 8 ++i;
279 }
280 }
281 ✗ catch (const boost::interprocess::bad_alloc&)
282 {
283 ✗ throw shared_memory::Allocation_exception(segment_id, object_id);
284 }
285 4 }
286
287 /***********************************
288 * Definition of all get functions *
289 ***********************************/
290
291 template <typename ElemType>
292 1323 void get(const std::string& segment_id,
293 const std::string& object_id,
294 ElemType& get_,
295 bool create)
296 {
297 try
298 {
299
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 1323 SharedMemorySegment& segment = get_segment(segment_id, false, create);
300 1322 std::pair<ElemType*, std::size_t> get_ref;
301 1322 get_ref.first = &get_;
302 1322 get_ref.second = 1;
303
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 1322 segment.get_object<ElemType>(object_id, get_ref);
304 }
305 ✗ catch (const boost::interprocess::bad_alloc&)
306 {
307 ✗ throw shared_memory::Allocation_exception(segment_id, object_id);
308 }
309
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 1322 }
310
311 template <typename ElemType>
312 7526 void get(const std::string& segment_id,
313 const std::string& object_id,
314 ElemType* get_,
315 const std::size_t expected_size,
316 bool create)
317 {
318 try
319 {
320
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 7526 SharedMemorySegment& segment = get_segment(segment_id, false, create);
321 7526 std::pair<ElemType*, std::size_t> get_ref;
322 7526 get_ref.first = get_;
323 7526 get_ref.second = expected_size;
324
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 7526 segment.get_object<ElemType>(object_id, get_ref);
325 }
326 ✗ catch (const boost::interprocess::bad_alloc&)
327 {
328 ✗ throw shared_memory::Allocation_exception(segment_id, object_id);
329 }
330
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 7525 }
331
332 template <typename ElemType>
333 4 void get(const std::string& segment_id,
334 const std::string& object_id,
335 std::vector<ElemType>& get_,
336 bool create)
337 {
338 4 get<ElemType>(segment_id, object_id, &(get_[0]), get_.size(), create);
339 3 }
340
341 template <typename ElemType>
342 3 void get(const std::string& segment_id,
343 const std::string& object_id,
344 Eigen::Matrix<ElemType, Eigen::Dynamic, 1>& get_,
345 bool create)
346 {
347 3 get(segment_id, object_id, get_.data(), get_.size(), create);
348 3 }
349
350 template <typename FirstType, typename SecondType>
351 void get(const std::string& segment_id,
352 const std::string& object_id,
353 std::pair<FirstType, SecondType>& get_,
354 bool create)
355 {
356 get<FirstType>(segment_id, object_id + "_first", get_.first, create);
357 get<SecondType>(segment_id, object_id + "_second", get_.second, create);
358 }
359
360 template <typename KeyType, typename ValueType>
361 4 void get(const std::string& segment_id,
362 const std::string& object_id,
363 std::map<KeyType, ValueType>& get_,
364 bool create)
365 {
366 try
367 {
368 4 int i = 0;
369 12 for (typename std::map<KeyType, ValueType>::iterator map_it =
370 get_.begin();
371
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 12 map_it != get_.end();
372 ++map_it)
373 {
374
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 16 get(segment_id,
375 object_id + "_" + std::to_string(i),
376 8 map_it->second,
377 create);
378 8 ++i;
379 }
380 }
381 ✗ catch (const boost::interprocess::bad_alloc&)
382 {
383 ✗ throw shared_memory::Allocation_exception(segment_id, object_id);
384 }
385 4 }
386
387 } // namespace shared_memory
388