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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 | ////////////////////////////////////////////////////////////////////////////// | |
1e59de90 | 10 | |
7c673cae FG |
11 | //[doc_anonymous_mutexA |
12 | #include <boost/interprocess/shared_memory_object.hpp> | |
13 | #include <boost/interprocess/mapped_region.hpp> | |
14 | #include <boost/interprocess/sync/scoped_lock.hpp> | |
15 | #include "doc_anonymous_mutex_shared_data.hpp" | |
16 | #include <iostream> | |
17 | #include <cstdio> | |
18 | ||
19 | using namespace boost::interprocess; | |
20 | ||
21 | int main () | |
22 | { | |
1e59de90 | 23 | BOOST_TRY{ |
7c673cae FG |
24 | //Remove shared memory on construction and destruction |
25 | struct shm_remove | |
26 | { | |
27 | shm_remove() { shared_memory_object::remove("MySharedMemory"); } | |
28 | ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); } | |
29 | } remover; | |
30 | //<- | |
31 | (void)remover; | |
32 | //-> | |
33 | ||
34 | //Create a shared memory object. | |
35 | shared_memory_object shm | |
36 | (create_only //only create | |
37 | ,"MySharedMemory" //name | |
38 | ,read_write //read-write mode | |
39 | ); | |
40 | ||
41 | //Set size | |
42 | shm.truncate(sizeof(shared_memory_log)); | |
43 | ||
44 | //Map the whole shared memory in this process | |
45 | mapped_region region | |
46 | (shm //What to map | |
47 | ,read_write //Map it as read-write | |
48 | ); | |
49 | ||
50 | //Get the address of the mapped region | |
51 | void * addr = region.get_address(); | |
52 | ||
53 | //Construct the shared structure in memory | |
54 | shared_memory_log * data = new (addr) shared_memory_log; | |
55 | ||
56 | //Write some logs | |
57 | for(int i = 0; i < shared_memory_log::NumItems; ++i){ | |
58 | //Lock the mutex | |
59 | scoped_lock<interprocess_mutex> lock(data->mutex); | |
60 | std::sprintf(data->items[(data->current_line++) % shared_memory_log::NumItems] | |
61 | ,"%s_%d", "process_a", i); | |
62 | if(i == (shared_memory_log::NumItems-1)) | |
63 | data->end_a = true; | |
64 | //Mutex is released here | |
65 | } | |
66 | ||
67 | //Wait until the other process ends | |
68 | while(1){ | |
69 | scoped_lock<interprocess_mutex> lock(data->mutex); | |
70 | if(data->end_b) | |
71 | break; | |
72 | } | |
73 | } | |
1e59de90 | 74 | BOOST_CATCH(interprocess_exception &ex){ |
7c673cae FG |
75 | std::cout << ex.what() << std::endl; |
76 | return 1; | |
1e59de90 | 77 | } BOOST_CATCH_END |
7c673cae FG |
78 | return 0; |
79 | } | |
80 | //] | |
1e59de90 | 81 |