Ticket #5593: test.cpp

#include <boost/interprocess/managed_mapped_file.hpp>
#include <boost/interprocess/containers/string.hpp>
#include <boost/interprocess/containers/vector.hpp>
#include <boost/interprocess/allocators/allocator.hpp>

#include <functional>
#include <utility>
#include <stddef.h>
#include <iostream>

int main()
{
    using namespace boost::interprocess;

    const size_t mapped_segment_size = 0x1 << 20; // 1MB

    const char* test_strings[] = { "a1", "b2", "c3", "d4", "e5" };

    const size_t num_strings = sizeof(test_strings)/sizeof(const char*);

    typedef managed_mapped_file::segment_manager segment_manager_t;

    typedef allocator<char, segment_manager_t> shm_char_allocator_t;

    typedef basic_string<char, std::char_traits<char>, shm_char_allocator_t> shm_string_t;

    typedef allocator<shm_string_t, segment_manager_t> shm_string_allocator_t;

    typedef vector<shm_string_t, shm_string_allocator_t> shm_string_vector_t;

    managed_mapped_file segment(open_or_create, "TestMappedFile", mapped_segment_size);

    shm_char_allocator_t shm_char_allocator(segment.get_segment_manager());

    shm_string_allocator_t shm_string_allocator(segment.get_segment_manager());

    shm_string_vector_t* vec = segment.find<shm_string_vector_t>("TestStringVector").first;
    if (vec == 0) {
        // We didn't find it; create and populate it
        vec = segment.construct<shm_string_vector_t>("TestStringVector")(shm_string_allocator);
        for (size_t i = 0; i < num_strings; ++i) {
            vec->push_back(shm_string_t(test_strings[i], shm_char_allocator));
        }
    }

    // Print out values
    std::cout << "Shared memory allocator: " << std::endl;
    for (shm_string_vector_t::iterator i = vec->begin(); i != vec->end(); ++i) {
        const shm_string_t& s = *i;
        std::cout << "String: '" << s << "' size: " << s.size() << " length: " << s.length()
                  << " c_str(): '" << s.c_str() << "'"
                  << std::endl;
    }
    std::cout << "Standard allocator: " << std::endl;
    vector<string> vec2;
    for (size_t j = 0; j < num_strings; ++j) {
        vec2.push_back(string(test_strings[j]));
    }
    for (vector<string>::iterator k = vec2.begin(); k != vec2.end(); ++k) {
        const string& s = *k;
        std::cout << "String: '" << s << "' size: " << s.size() << " length: " << s.length()
                  << " c_str(): '" << s.c_str() << "'"
                  << std::endl;
    }
    return 0;
}