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1 | ////////////////////////////////////////////////////////////////////////////// |
2 | // | |
3 | // (C) Copyright Ion Gaztanaga 2006-2012. Distributed under the Boost | |
4 | // Software License, Version 1.0. (See accompanying file | |
5 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | // | |
7 | // See http://www.boost.org/libs/interprocess for documentation. | |
8 | // | |
9 | ////////////////////////////////////////////////////////////////////////////// | |
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7c673cae FG |
11 | #include <boost/interprocess/detail/workaround.hpp> |
12 | //[doc_where_allocate | |
13 | #include <boost/interprocess/managed_shared_memory.hpp> | |
14 | #include <boost/interprocess/containers/vector.hpp> | |
15 | #include <boost/interprocess/containers/string.hpp> | |
16 | #include <boost/interprocess/allocators/allocator.hpp> | |
17 | //<- | |
18 | #include "../test/get_process_id_name.hpp" | |
19 | //-> | |
20 | ||
21 | int main () | |
22 | { | |
23 | using namespace boost::interprocess; | |
24 | //Typedefs | |
25 | typedef allocator<char, managed_shared_memory::segment_manager> | |
26 | CharAllocator; | |
27 | typedef basic_string<char, std::char_traits<char>, CharAllocator> | |
28 | MyShmString; | |
29 | typedef allocator<MyShmString, managed_shared_memory::segment_manager> | |
30 | StringAllocator; | |
31 | typedef vector<MyShmString, StringAllocator> | |
32 | MyShmStringVector; | |
33 | ||
34 | //Open shared memory | |
35 | //Remove shared memory on construction and destruction | |
36 | struct shm_remove | |
37 | { | |
38 | //<- | |
39 | #if 1 | |
40 | shm_remove() { shared_memory_object::remove(test::get_process_id_name()); } | |
41 | ~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); } | |
42 | #else | |
43 | //-> | |
44 | shm_remove() { shared_memory_object::remove("MySharedMemory"); } | |
45 | ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); } | |
46 | //<- | |
47 | #endif | |
48 | //-> | |
49 | } remover; | |
50 | //<- | |
51 | (void)remover; | |
52 | //-> | |
53 | ||
54 | //<- | |
55 | #if 1 | |
56 | managed_shared_memory shm(create_only, test::get_process_id_name(), 10000); | |
57 | #else | |
58 | //-> | |
59 | managed_shared_memory shm(create_only, "MySharedMemory", 10000); | |
60 | //<- | |
61 | #endif | |
62 | //-> | |
63 | ||
64 | //Create allocators | |
65 | CharAllocator charallocator (shm.get_segment_manager()); | |
66 | StringAllocator stringallocator(shm.get_segment_manager()); | |
67 | ||
68 | //This string is in only in this process (the pointer pointing to the | |
69 | //buffer that will hold the text is not in shared memory). | |
70 | //But the buffer that will hold "this is my text" is allocated from | |
71 | //shared memory | |
72 | MyShmString mystring(charallocator); | |
73 | mystring = "this is my text"; | |
74 | ||
75 | //This vector is only in this process (the pointer pointing to the | |
76 | //buffer that will hold the MyShmString-s is not in shared memory). | |
77 | //But the buffer that will hold 10 MyShmString-s is allocated from | |
78 | //shared memory using StringAllocator. Since strings use a shared | |
79 | //memory allocator (CharAllocator) the 10 buffers that hold | |
80 | //"this is my text" text are also in shared memory. | |
81 | MyShmStringVector myvector(stringallocator); | |
82 | myvector.insert(myvector.begin(), 10, mystring); | |
83 | ||
84 | //This vector is fully constructed in shared memory. All pointers | |
85 | //buffers are constructed in the same shared memory segment | |
86 | //This vector can be safely accessed from other processes. | |
87 | MyShmStringVector *myshmvector = | |
88 | shm.construct<MyShmStringVector>("myshmvector")(stringallocator); | |
89 | myshmvector->insert(myshmvector->begin(), 10, mystring); | |
90 | ||
91 | //Destroy vector. This will free all strings that the vector contains | |
92 | shm.destroy_ptr(myshmvector); | |
93 | return 0; | |
94 | } | |
95 | //] | |
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