// In header: <boost/interprocess/anonymous_shared_memory.hpp> mapped_region anonymous_shared_memory(std::size_t size, void * address = 0);
A function that creates an anonymous shared memory segment of size "size". If "address" is passed the function will try to map the segment in that address. Otherwise the operating system will choose the mapping address. The function returns a mapped_region holding that segment or throws interprocess_exception if the function fails.