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- //////////////////////////////////////////////////////////////////////////////
- //
- // (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>
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