b68e12a681
[SVN r80138]
97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// (C) Copyright Ion Gaztanaga 2006-2012. 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/config_begin.hpp>
|
|
#include <boost/interprocess/detail/workaround.hpp>
|
|
//[doc_where_allocate
|
|
#include <boost/interprocess/managed_shared_memory.hpp>
|
|
#include <boost/interprocess/containers/vector.hpp>
|
|
#include <boost/interprocess/containers/string.hpp>
|
|
#include <boost/interprocess/allocators/allocator.hpp>
|
|
//<-
|
|
#include "../test/get_process_id_name.hpp"
|
|
//->
|
|
|
|
int main ()
|
|
{
|
|
using namespace boost::interprocess;
|
|
//Typedefs
|
|
typedef allocator<char, managed_shared_memory::segment_manager>
|
|
CharAllocator;
|
|
typedef basic_string<char, std::char_traits<char>, CharAllocator>
|
|
MyShmString;
|
|
typedef allocator<MyShmString, managed_shared_memory::segment_manager>
|
|
StringAllocator;
|
|
typedef vector<MyShmString, StringAllocator>
|
|
MyShmStringVector;
|
|
|
|
//Open shared memory
|
|
//Remove shared memory on construction and destruction
|
|
struct shm_remove
|
|
{
|
|
//<-
|
|
#if 1
|
|
shm_remove() { shared_memory_object::remove(test::get_process_id_name()); }
|
|
~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); }
|
|
#else
|
|
//->
|
|
shm_remove() { shared_memory_object::remove("MySharedMemory"); }
|
|
~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
|
|
//<-
|
|
#endif
|
|
//->
|
|
} remover;
|
|
//<-
|
|
(void)remover;
|
|
//->
|
|
|
|
//<-
|
|
#if 1
|
|
managed_shared_memory shm(create_only, test::get_process_id_name(), 10000);
|
|
#else
|
|
//->
|
|
managed_shared_memory shm(create_only, "MySharedMemory", 10000);
|
|
//<-
|
|
#endif
|
|
//->
|
|
|
|
//Create allocators
|
|
CharAllocator charallocator (shm.get_segment_manager());
|
|
StringAllocator stringallocator(shm.get_segment_manager());
|
|
|
|
//This string is in only in this process (the pointer pointing to the
|
|
//buffer that will hold the text is not in shared memory).
|
|
//But the buffer that will hold "this is my text" is allocated from
|
|
//shared memory
|
|
MyShmString mystring(charallocator);
|
|
mystring = "this is my text";
|
|
|
|
//This vector is only in this process (the pointer pointing to the
|
|
//buffer that will hold the MyShmString-s is not in shared memory).
|
|
//But the buffer that will hold 10 MyShmString-s is allocated from
|
|
//shared memory using StringAllocator. Since strings use a shared
|
|
//memory allocator (CharAllocator) the 10 buffers that hold
|
|
//"this is my text" text are also in shared memory.
|
|
MyShmStringVector myvector(stringallocator);
|
|
myvector.insert(myvector.begin(), 10, mystring);
|
|
|
|
//This vector is fully constructed in shared memory. All pointers
|
|
//buffers are constructed in the same shared memory segment
|
|
//This vector can be safely accessed from other processes.
|
|
MyShmStringVector *myshmvector =
|
|
shm.construct<MyShmStringVector>("myshmvector")(stringallocator);
|
|
myshmvector->insert(myshmvector->begin(), 10, mystring);
|
|
|
|
//Destroy vector. This will free all strings that the vector contains
|
|
shm.destroy_ptr(myshmvector);
|
|
return 0;
|
|
}
|
|
//]
|
|
#include <boost/interprocess/detail/config_end.hpp>
|