240 lines
7.9 KiB
C++
240 lines
7.9 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2004-2012. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/interprocess for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#include <boost/interprocess/detail/config_begin.hpp>
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#include <fstream>
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#include <iostream>
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#include <boost/interprocess/shared_memory_object.hpp>
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#include <boost/interprocess/mapped_region.hpp>
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#include <boost/interprocess/anonymous_shared_memory.hpp>
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#include <string>
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#include "get_process_id_name.hpp"
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using namespace boost::interprocess;
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shared_memory_object get_shared_memory_mapping()
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{
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shared_memory_object sh;
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return shared_memory_object(boost::move(sh));
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}
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int main ()
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{
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std::string process_id = test::get_process_id_name();
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std::string process_id2(process_id);
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process_id2 += "_2";
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try{
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const std::size_t FileSize = 99999*4;
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{
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//Remove shared memory
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shared_memory_object::remove(process_id.c_str());
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shared_memory_object::remove(process_id2.c_str());
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//Create shared memory and file mapping
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shared_memory_object mapping(create_only, process_id.c_str(), read_write);
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mapping.truncate(FileSize);
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}
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{
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//Create a file mapping
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shared_memory_object mapping(open_only, process_id.c_str(), read_write);
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//Create two mapped regions, one half of the file each
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mapped_region region (mapping
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,read_write
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,0
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,FileSize/2
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,0);
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mapped_region region2(mapping
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,read_write
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,FileSize/2
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,FileSize - FileSize/2
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,0);
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//Fill two regions with a pattern
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unsigned char *filler = static_cast<unsigned char*>(region.get_address());
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for(std::size_t i = 0
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;i < FileSize/2
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;++i){
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*filler++ = static_cast<unsigned char>(i);
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}
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filler = static_cast<unsigned char*>(region2.get_address());
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for(std::size_t i = FileSize/2
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;i < FileSize
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;++i){
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*filler++ = static_cast<unsigned char>(i);
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}
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if(!region.flush(0, 0, false)){
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return 1;
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}
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if(!region2.flush(0, 0, true)){
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return 1;
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}
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}
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//See if the pattern is correct in the file using two mapped regions
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{
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//Create a file mapping
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shared_memory_object mapping(open_only, process_id.c_str(), read_write);
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mapped_region region(mapping, read_write, 0, FileSize/2, 0);
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mapped_region region2(mapping, read_write, FileSize/2, FileSize - FileSize/2, 0);
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unsigned char *checker = static_cast<unsigned char*>(region.get_address());
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//Check pattern
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for(std::size_t i = 0
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;i < FileSize/2
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;++i){
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if(*checker++ != static_cast<unsigned char>(i)){
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return 1;
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}
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}
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//Check second half
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checker = static_cast<unsigned char *>(region2.get_address());
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//Check pattern
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for(std::size_t i = FileSize/2
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;i < FileSize
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;++i){
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if(*checker++ != static_cast<unsigned char>(i)){
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return 1;
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}
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}
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}
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//Now check the pattern mapping a single read only mapped_region
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{
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//Create a file mapping
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shared_memory_object mapping(open_only, process_id.c_str(), read_only);
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//Create a single regions, mapping all the file
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mapped_region region (mapping, read_only);
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//Check pattern
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unsigned char *pattern = static_cast<unsigned char*>(region.get_address());
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for(std::size_t i = 0
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;i < FileSize
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;++i, ++pattern){
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if(*pattern != static_cast<unsigned char>(i)){
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return 1;
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}
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}
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//Now shrink
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const std::size_t original_region_size = region.get_size();
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if(!region.shrink_by(region.get_size()/2, false) || region.get_size() != original_region_size/2){
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return 1;
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}
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const std::size_t shrunk_region_size = region.get_size();
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if(!region.shrink_by(region.get_size()/2, true) || region.get_size() != shrunk_region_size/2){
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return 1;
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}
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//Now advise
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#if defined(POSIX_MADV_NORMAL) || defined(MADV_NORMAL)
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std::cout << "Advice normal" << std::endl;
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if(!region.advise(mapped_region::advice_normal)){
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return 1;
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}
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#endif
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#if defined(POSIX_MADV_SEQUENTIAL) || defined(MADV_SEQUENTIAL)
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std::cout << "Advice sequential" << std::endl;
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if(!region.advise(mapped_region::advice_sequential)){
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return 1;
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}
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#endif
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#if defined(POSIX_MADV_RANDOM) || defined(MADV_RANDOM)
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std::cout << "Advice random" << std::endl;
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if(!region.advise(mapped_region::advice_random)){
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return 1;
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}
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#endif
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#if defined(POSIX_MADV_WILLNEED) || defined(MADV_WILLNEED)
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std::cout << "Advice 'will need'" << std::endl;
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if(!region.advise(mapped_region::advice_willneed)){
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return 1;
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}
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#endif
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#if defined(POSIX_MADV_DONTNEED) || (defined(MADV_DONTNEED) && defined(BOOST_INTERPROCESS_MADV_DONTNEED_HAS_NONDESTRUCTIVE_SEMANTICS))
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std::cout << "Advice 'dont't need'" << std::endl;
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if(!region.advise(mapped_region::advice_dontneed)){
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return 1;
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}
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#endif
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}
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{
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//Check for busy address space
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shared_memory_object mapping(open_only, process_id.c_str(), read_only);
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mapped_region region (mapping, read_only);
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shared_memory_object mapping2(create_only, process_id2.c_str(), read_write);
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mapping2.truncate(FileSize);
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try{
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mapped_region region2 (mapping2, read_only, 0, FileSize, region.get_address());
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}
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catch(interprocess_exception &e){
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shared_memory_object::remove(process_id2.c_str());
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if(e.get_error_code() != busy_error){
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throw e;
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}
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}
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catch(std::exception &){
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shared_memory_object::remove(process_id2.c_str());
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throw;
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}
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shared_memory_object::remove(process_id2.c_str());
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}
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{
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//Now check anonymous mapping
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mapped_region region(anonymous_shared_memory(FileSize));
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//Write pattern
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unsigned char *pattern = static_cast<unsigned char*>(region.get_address());
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for(std::size_t i = 0
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;i < FileSize
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;++i, ++pattern){
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*pattern = static_cast<unsigned char>(i);
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}
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//Check pattern
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pattern = static_cast<unsigned char*>(region.get_address());
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for(std::size_t i = 0
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;i < FileSize
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;++i, ++pattern){
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if(*pattern != static_cast<unsigned char>(i)){
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return 1;
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}
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}
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}
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{
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//Now test move semantics
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shared_memory_object mapping(open_only, process_id.c_str(), read_write);
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shared_memory_object move_ctor(boost::move(mapping));
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shared_memory_object move_assign;
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move_assign = boost::move(move_ctor);
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shared_memory_object ret(get_shared_memory_mapping());
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}
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}
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catch(std::exception &exc){
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shared_memory_object::remove(process_id.c_str());
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shared_memory_object::remove(process_id2.c_str());
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std::cout << "Unhandled exception: " << exc.what() << std::endl;
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return 1;
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}
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shared_memory_object::remove(process_id.c_str());
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return 0;
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}
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