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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 <boost/interprocess/allocators/allocator.hpp>
#include <boost/interprocess/containers/vector.hpp>
#include <boost/interprocess/managed_mapped_file.hpp>
#include <cstdio>
#include <string>
#include "get_process_id_name.hpp"
using namespace boost::interprocess;
int main ()
{
const int FileSize = 65536;
const char *const FileName = test::get_process_id_name();
//STL compatible allocator object for memory-mapped file
typedef allocator<int, managed_mapped_file::segment_manager>
allocator_int_t;
//A vector that uses that allocator
typedef boost::interprocess::vector<int, allocator_int_t> MyVect;
{
//Remove the file it is already created
std::remove(FileName);
const int max = 100;
void *array[max];
//Named allocate capable shared memory allocator
managed_mapped_file mfile(create_only, FileName, FileSize);
int i;
//Let's allocate some memory
for(i = 0; i < max; ++i){
array[i] = mfile.allocate(i+1);
}
//Deallocate allocated memory
for(i = 0; i < max; ++i){
mfile.deallocate(array[i]);
}
}
{
//Remove the file it is already created
std::remove(FileName);
//Named allocate capable memory mapped file managed memory class
managed_mapped_file mfile(create_only, FileName, FileSize);
//Construct the STL-like allocator with the segment manager
const allocator_int_t myallocator (mfile.get_segment_manager());
//Construct vector
MyVect *mfile_vect = mfile.construct<MyVect> ("MyVector") (myallocator);
//Test that vector can be found via name
if(mfile_vect != mfile.find<MyVect>("MyVector").first)
return -1;
//Destroy and check it is not present
mfile.destroy<MyVect> ("MyVector");
if(0 != mfile.find<MyVect>("MyVector").first)
return -1;
//Construct a vector in the memory-mapped file
mfile_vect = mfile.construct<MyVect> ("MyVector") (myallocator);
//Flush cached data from memory-mapped file to disk
mfile.flush();
}
{
//Map preexisting file again in memory
managed_mapped_file mfile(open_only, FileName);
//Check vector is still there
MyVect *mfile_vect = mfile.find<MyVect>("MyVector").first;
if(!mfile_vect)
return -1;
}
{
std::size_t old_free_memory;
{
//Map preexisting file again in memory
managed_mapped_file mfile(open_only, FileName);
old_free_memory = mfile.get_free_memory();
}
//Now grow the file
managed_mapped_file::grow(FileName, FileSize);
//Map preexisting file again in memory
managed_mapped_file mfile(open_only, FileName);
//Check vector is still there
MyVect *mfile_vect = mfile.find<MyVect>("MyVector").first;
if(!mfile_vect)
return -1;
if(mfile.get_size() != (FileSize*2))
return -1;
if(mfile.get_free_memory() <= old_free_memory)
return -1;
}
{
std::size_t old_free_memory, next_free_memory,
old_file_size, next_file_size, final_file_size;
{
//Map preexisting file again in memory
managed_mapped_file mfile(open_only, FileName);
old_free_memory = mfile.get_free_memory();
old_file_size = mfile.get_size();
}
//Now shrink the file
managed_mapped_file::shrink_to_fit(FileName);
{
//Map preexisting file again in memory
managed_mapped_file mfile(open_only, FileName);
next_file_size = mfile.get_size();
//Check vector is still there
MyVect *mfile_vect = mfile.find<MyVect>("MyVector").first;
if(!mfile_vect)
return -1;
next_free_memory = mfile.get_free_memory();
if(next_free_memory >= old_free_memory)
return -1;
if(old_file_size <= next_file_size)
return -1;
}
//Now destroy the vector
{
//Map preexisting file again in memory
managed_mapped_file mfile(open_only, FileName);
//Destroy and check it is not present
mfile.destroy<MyVect>("MyVector");
if(0 != mfile.find<MyVect>("MyVector").first)
return -1;
}
//Now shrink the file
managed_mapped_file::shrink_to_fit(FileName);
{
//Map preexisting file again in memory
managed_mapped_file mfile(open_only, FileName);
final_file_size = mfile.get_size();
if(next_file_size <= final_file_size)
return -1;
}
}
std::remove(FileName);
return 0;
}
#include <boost/interprocess/detail/config_end.hpp>
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