1 //////////////////////////////////////////////////////////////////////////////
3 // (C) Copyright Ion Gaztanaga 2006-2009. 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)
7 // See http://www.boost.org/libs/interprocess for documentation.
9 //////////////////////////////////////////////////////////////////////////////
10 #include <boost/interprocess/detail/config_begin.hpp>
11 #include <boost/interprocess/detail/workaround.hpp>
13 #include <boost/interprocess/managed_shared_memory.hpp>
14 #include <boost/interprocess/streams/bufferstream.hpp>
19 #include "../test/get_process_id_name.hpp"
22 using namespace boost::interprocess;
26 //Remove shared memory on construction and destruction
31 shm_remove() { shared_memory_object::remove(test::get_process_id_name()); }
32 ~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); }
35 shm_remove() { shared_memory_object::remove("MySharedMemory"); }
36 ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
42 //Create shared memory
45 managed_shared_memory segment(create_only,test::get_process_id_name(), 65536);
48 managed_shared_memory segment(create_only,
49 "MySharedMemory", //segment name
56 std::vector<int> data;
58 for(int i = 0; i < 100; ++i){
61 const std::size_t BufferSize = 100*5;
63 //Allocate a buffer in shared memory to write data
65 segment.construct<char>("MyCString")[BufferSize](0);
66 bufferstream mybufstream(my_cstring, BufferSize);
68 //Now write data to the buffer
69 for(int i = 0; i < 100; ++i){
70 mybufstream << data[i] << std::endl;
73 //Check there was no overflow attempt
74 assert(mybufstream.good());
76 //Extract all values from the shared memory string
77 //directly to a vector.
78 std::vector<int> data2;
79 std::istream_iterator<int> it(mybufstream), itend;
80 std::copy(it, itend, std::back_inserter(data2));
82 //This extraction should have ended will fail error since
83 //the numbers formatted in the buffer end before the end
84 //of the buffer. (Otherwise it would trigger eofbit)
85 assert(mybufstream.fail());
88 assert(std::equal(data.begin(), data.end(), data2.begin()));
90 //Clear errors and rewind
92 mybufstream.seekp(0, std::ios::beg);
94 //Now write again the data trying to do a buffer overflow
95 for(int i = 0, m = data.size()*5; i < m; ++i){
96 mybufstream << data[i%5] << std::endl;
99 //Now make sure badbit is active
100 //which means overflow attempt.
101 assert(!mybufstream.good());
102 assert(mybufstream.bad());
103 segment.destroy_ptr(my_cstring);
107 #include <boost/interprocess/detail/config_end.hpp>