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//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2004-2007. 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>
#include <fstream>
#include <iostream>
#include <boost/interprocess/shared_memory_object.hpp>
#include <boost/interprocess/mapped_region.hpp>
#include <string>
#include "get_process_id_name.hpp"
using namespace boost::interprocess;
int main ()
{
try{
const std::size_t FileSize = 99999*2;
{
//Remove shared memory
shared_memory_object::remove(test::get_process_id_name());
//Create shared memory and file mapping
shared_memory_object mapping(create_only, test::get_process_id_name(), read_write);
mapping.truncate(FileSize);
}
{
//Create a file mapping
shared_memory_object mapping(open_only, test::get_process_id_name(), read_write);
//Create two mapped regions, one half of the file each
mapped_region region (mapping
,read_write
,0
,FileSize/2
,0);
mapped_region region2(mapping
,read_write
,FileSize/2
,FileSize - FileSize/2
,0);
//Fill two regions with a pattern
unsigned char *filler = static_cast<unsigned char*>(region.get_address());
for(std::size_t i = 0
;i < FileSize/2
;++i){
*filler++ = static_cast<unsigned char>(i);
}
filler = static_cast<unsigned char*>(region2.get_address());
for(std::size_t i = FileSize/2
;i < FileSize
;++i){
*filler++ = static_cast<unsigned char>(i);
}
}
//See if the pattern is correct in the file using two mapped regions
{
//Create a file mapping
shared_memory_object mapping(open_only, test::get_process_id_name(), read_write);
mapped_region region(mapping, read_write, 0, FileSize/2, 0);
mapped_region region2(mapping, read_write, FileSize/2, FileSize - FileSize/2, 0);
unsigned char *checker = (unsigned char*)region.get_address();
//Check pattern
for(std::size_t i = 0
;i < FileSize/2
;++i){
if(*checker++ != static_cast<unsigned char>(i)){
return 1;
}
}
//Check second half
checker = (unsigned char *)region2.get_address();
//Check pattern
for(std::size_t i = FileSize/2
;i < FileSize
;++i){
if(*checker++ != static_cast<unsigned char>(i)){
return 1;
}
}
}
//Now check the pattern mapping a single read only mapped_region
{
//Create a file mapping
shared_memory_object mapping(open_only, test::get_process_id_name(), read_only);
//Create a single regions, mapping all the file
mapped_region region (mapping
,read_only);
//Check pattern
unsigned char *pattern = static_cast<unsigned char*>(region.get_address());
for(std::size_t i = 0
;i < FileSize
;++i, ++pattern){
if(*pattern != static_cast<unsigned char>(i)){
return 1;
}
}
}
}
catch(std::exception &exc){
shared_memory_object::remove(test::get_process_id_name());
std::cout << "Unhandled exception: " << exc.what() << std::endl;
return 1;
}
shared_memory_object::remove(test::get_process_id_name());
return 0;
}
#include <boost/interprocess/detail/config_end.hpp>
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