[zeromq-dev] Memory management

Jeff Shanab jshanab at jfs-tech.com
Thu Apr 14 13:19:40 CEST 2016

Thanks I think I have some Ideas to try,

On Thu, Apr 14, 2016 at 7:08 AM, Auer, Jens <jens.auer at cgi.com> wrote:

> Hi,
> there is zmq_msg_init_data which gets a callback which is called when the
> message is released. However, it is not fully zero-copy because some
> copying is done when receiving messages. With 4.2, this is reduced, but
> until that, the data is received into a fixed buffer and then copied into
> the message.
> That all reminds me that I wanted to add the possibility to use custom
> allocator functions to be able to use a memory pool. I think it should be
> possible, e.g. by setting function pointers as zmq context options, plus
> void* hint that can be set too.
> Cheers,
>   Jens
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> ------------------------------
> *Von:* zeromq-dev-bounces at lists.zeromq.org [
> zeromq-dev-bounces at lists.zeromq.org]" im Auftrag von "Jeff Shanab [
> jshanab at jfs-tech.com]
> *Gesendet:* Donnerstag, 14. April 2016 12:06
> *An:* ZeroMQ development list
> *Betreff:* [zeromq-dev] Memory management
> I am writing an app in C++ and using libzmq directly, not much of the c++
> wrapper stuff.
> I am interested in zero copy or at least minimizing the number of copies
> of large buffers.
> But am running across an all too common issue, Each library used wants to
> have their own memory management forcing me to copy between the systems.
> Is there a way I could use boost shared_ptr<zmq_msg_t> with the functions
> so ZMQ could dereference/delete after the send?
> In fact is there a way to hook into the system and get a callback when it
> goes to delete with the client pointer so I can delete or return it to a
> pool?
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