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//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2008-2012. 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/workaround.hpp>
#if defined(BOOST_INTERPROCESS_XSI_SHARED_MEMORY_OBJECTS)
#include <boost/interprocess/allocators/allocator.hpp>
#include <boost/interprocess/containers/vector.hpp>
#include <boost/interprocess/managed_xsi_shared_memory.hpp>
#include <boost/interprocess/detail/file_wrapper.hpp>
#include <boost/interprocess/file_mapping.hpp>
#include <cstdio>
#include <string>
#include "get_process_id_name.hpp"
using namespace boost::interprocess;
void remove_shared_memory(const xsi_key &key)
{
BOOST_TRY{
xsi_shared_memory xsi(open_only, key);
xsi_shared_memory::remove(xsi.get_shmid());
}
BOOST_CATCH(interprocess_exception &e){
if(e.get_error_code() != not_found_error)
BOOST_RETHROW
} BOOST_CATCH_END
}
class xsi_shared_memory_remover
{
public:
xsi_shared_memory_remover(xsi_shared_memory &xsi_shm)
: xsi_shm_(xsi_shm)
{}
~xsi_shared_memory_remover()
{ xsi_shared_memory::remove(xsi_shm_.get_shmid()); }
private:
xsi_shared_memory & xsi_shm_;
};
int main ()
{
const std::size_t ShmemSize = 65536;
std::string filename = get_filename();
const char *const ShmemName = filename.c_str();
file_mapping::remove(ShmemName);
{ ipcdetail::file_wrapper(create_only, ShmemName, read_write); }
xsi_key key(ShmemName, 1);
file_mapping::remove(ShmemName);
int shmid;
//STL compatible allocator object for memory-mapped shmem
typedef allocator<int, managed_xsi_shared_memory::segment_manager>
allocator_int_t;
//A vector that uses that allocator
typedef boost::interprocess::vector<int, allocator_int_t> MyVect;
{
//Remove the shmem it is already created
remove_shared_memory(key);
const std::size_t max = 100;
void *array[max];
//Named allocate capable shared memory allocator
managed_xsi_shared_memory shmem(create_only, key, ShmemSize);
shmid = shmem.get_shmid();
std::size_t i;
//Let's allocate some memory
for(i = 0; i < max; ++i){
array[i] = shmem.allocate(i+1u);
}
//Deallocate allocated memory
for(i = 0; i < max; ++i){
shmem.deallocate(array[i]);
}
}
{
//Remove the shmem it is already created
xsi_shared_memory::remove(shmid);
//Named allocate capable memory mapped shmem managed memory class
managed_xsi_shared_memory shmem(create_only, key, ShmemSize);
shmid = shmem.get_shmid();
//Construct the STL-like allocator with the segment manager
const allocator_int_t myallocator (shmem.get_segment_manager());
//Construct vector
MyVect *shmem_vect = shmem.construct<MyVect> ("MyVector") (myallocator);
//Test that vector can be found via name
if(shmem_vect != shmem.find<MyVect>("MyVector").first)
return -1;
//Destroy and check it is not present
shmem.destroy<MyVect> ("MyVector");
if(0 != shmem.find<MyVect>("MyVector").first)
return -1;
//Construct a vector in the memory-mapped shmem
shmem_vect = shmem.construct<MyVect> ("MyVector") (myallocator);
}
{
//Map preexisting shmem again in memory
managed_xsi_shared_memory shmem(open_only, key);
shmid = shmem.get_shmid();
//Check vector is still there
MyVect *shmem_vect = shmem.find<MyVect>("MyVector").first;
if(!shmem_vect)
return -1;
}
{
//Now destroy the vector
{
//Map preexisting shmem again in memory
managed_xsi_shared_memory shmem(open_only, key);
shmid = shmem.get_shmid();
//Destroy and check it is not present
shmem.destroy<MyVect>("MyVector");
if(0 != shmem.find<MyVect>("MyVector").first)
return -1;
}
{
//Now test move semantics
managed_xsi_shared_memory original(open_only, key);
managed_xsi_shared_memory move_ctor(boost::move(original));
managed_xsi_shared_memory move_assign;
move_assign = boost::move(move_ctor);
move_assign.swap(original);
}
}
xsi_shared_memory::remove(shmid);
return 0;
}
#else
int main()
{
return 0;
}
#endif //#ifndef BOOST_INTERPROCESS_XSI_SHARED_MEMORY_OBJECTS
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