c++ - is it possible to place std::vector to shared memory?

Question

i would to create std::vector in shared memory using CreateFileMapping() windows API function. I know how to create shared memory and manage it, but how to place std::vector to fixed address in memory? I can't use boost or other libraries in my case, i am using CBuilder++ 2010. One variant i think is maybe use

std::vector<int> myVec; 
myVec *mv;
mv = shared_memory_addr ?

But how do i detect real size of vectors to resize memory?

Answer 1

I'd use Boost.Interprocess, which has an explanation of how to do just this: http://www.boost.org/doc/libs/1_38_0/doc/html/interprocess/quick_guide.html#interprocess.quick_guide.qg_interprocess_container

Note that this does not use std::vector<>, which is not suitable for shared-memory use, because it is typically implemented in terms of three pointers (begin, end, capacity, or some equivalents), and addresses will differ between processes. So Boost.Interprocess has its own vector class, which is purpose-built for what you are trying to do.