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 //////////////////////////////////////////////////////////////////////////////
10 #include <boost/interprocess/detail/config_begin.hpp>
11 //[doc_anonymous_semaphoreA
12 #include <boost/interprocess/shared_memory_object.hpp>
13 #include <boost/interprocess/mapped_region.hpp>
14 #include <iostream>
15 #include "doc_anonymous_semaphore_shared_data.hpp"
16 
17 using namespace boost::interprocess;
18 
main()19 int main ()
20 {
21    //Remove shared memory on construction and destruction
22    struct shm_remove
23    {
24       shm_remove() { shared_memory_object::remove("MySharedMemory"); }
25       ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
26    } remover;
27    //<-
28    (void)remover;
29    //->
30 
31    //Create a shared memory object.
32    shared_memory_object shm
33       (create_only                  //only create
34       ,"MySharedMemory"              //name
35       ,read_write  //read-write mode
36       );
37 
38    //Set size
39    shm.truncate(sizeof(shared_memory_buffer));
40 
41    //Map the whole shared memory in this process
42    mapped_region region
43       (shm                       //What to map
44       ,read_write //Map it as read-write
45       );
46 
47    //Get the address of the mapped region
48    void * addr       = region.get_address();
49 
50    //Construct the shared structure in memory
51    shared_memory_buffer * data = new (addr) shared_memory_buffer;
52 
53    const int NumMsg = 100;
54 
55    //Insert data in the array
56    for(int i = 0; i < NumMsg; ++i){
57       data->nempty.wait();
58       data->mutex.wait();
59       data->items[i % shared_memory_buffer::NumItems] = i;
60       data->mutex.post();
61       data->nstored.post();
62    }
63 
64    return 0;
65 }
66 //]
67 #include <boost/interprocess/detail/config_end.hpp>
68