A quick design question about C ++ container classes in shared memory

Question

I am writing a simple wrapper around a vector: vector forprocess container to implement a ring buffer in shared memory (shm) for IPC. Suppose it bufis an instance RingBuffercreated in shm. Now in his ctor bufhe selects a private data element boost::interprocess::vectorfor storing values, for example. m_data. My question is: I think it m_datashould also be created in shared memory. But is this a necessity?

What happens if the bufone created in shm itself allocates standard memory, i.e. using new. Does this work out on a bunch of calling process? I do not think that bufstands out there, as it turns out that there is distributed a data element that is private to the object, and not on the process heap. I'm confused.

Answer 1

boost::interprocess::vectoraccepts the type of dispenser as a template parameter. This allocator must be allocated from the shared memory (see. Usage examples).

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