[zeromq-dev] ZMQ - Send std::shared_ptr via inproc pub-sub?

Sergei Nikulov sergey.nikulov at gmail.com
Wed Jun 24 19:54:17 CEST 2020

On Wed, Jun 24, 2020 at 8:11 PM Serguei Khasimkhanov
<SerKhas at hotmail.com> wrote:
> Hello all,
> I have a publisher thread that has a bunch of shared_ptrs to large chunks of data. Occasionally I want to share some of those shared_ptrs with subscribers (for read-only.) The problem is that ZeroMQ only allows sending binary data, not C++ objects. How can I accomplish this?

You should serialize your object on publisher side -> send -> receive
-> deserialize on subscriber.
There is no other way except you doing some interprocess communication.
Ref. https://www.google.com/search?q=c%2B%2B+serialization

> I was thinking I could allocate a copy of the shared_ptr on the heap, then publish a pointer to it, but since I don't know when the subscribers are done using that pointer, I don't know when to deallocate it.
> - Ser
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Best Regards,
Sergei Nikulov

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