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//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2006-2007. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/interprocess for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#include <boost/interprocess/detail/config_begin.hpp>
//[doc_file_mapping2
#include <boost/interprocess/file_mapping.hpp>
#include <boost/interprocess/mapped_region.hpp>
#include <iostream>
#include <fstream>
#include <cstddef>
#include <cstdio> //std::remove
#include <vector>
int main ()
{
using namespace boost::interprocess;
try{
//Open the file mapping
file_mapping m_file ("file.bin", read_only);
//Map the whole file in this process
mapped_region region
(m_file //What to map
,read_only //Map it as read-only
);
//Get the address of the mapped region
void * addr = region.get_address();
std::size_t size = region.get_size();
//Check that memory was initialized to 1
const char *mem = static_cast<char*>(addr);
for(std::size_t i = 0; i < size; ++i){
if(*mem++ != 1){
std::cout << "Error checking memory!" << std::endl;
return 1;
}
}
//Now test it reading the file
std::filebuf fbuf;
fbuf.open("file.bin", std::ios_base::in | std::ios_base::binary);
//Read it to memory
std::vector<char> vect(region.get_size(), 0);
fbuf.sgetn(&vect[0], std::streamsize(vect.size()));
//Check that memory was initialized to 1
mem = static_cast<char*>(&vect[0]);
for(std::size_t i = 0; i < size; ++i){
if(*mem++ != 1){
std::cout << "Error checking memory!" << std::endl;
return 1;
}
}
std::cout << "Test successful!" << std::endl;
}
catch(interprocess_exception &ex){
std::remove("file.bin");
std::cout << "Unexpected exception: " << ex.what() << std::endl;
return 1;
}
std::remove("file.bin");
return 0;
}
//]
#include <boost/interprocess/detail/config_end.hpp>
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