[zeromq-dev] zmq_device : all in one patch

[Martin Sustrik]

Hi Jon,

> So I grabbed some time to tidy up this patch.
> I discovered that git could collapse patches all into one using 'git 
> rebase -i'
> which is certainly easier than applying the 9 I've sent previously.
> (confusingly git kept the name the same, which must be fixable)
> 
> As I said previously, please review and test.
> 
> I'm submitting this under the MIT license.

I've committed your changes. Devices can now be created within the 
process via 0MQ API:

...
int rc = zmq_device (ZMQ_FORWARDER, in_socket, out_socket);
...

In the process I've simplified the code to make it easier to maintain.

Following changes were made:

* EUNKNOWNDEVICE was dropped. EINVAL is used instead.
* As it's experimental I haven't committed the man page.
* Devices are implemented as functions rather than as classes.
* device_base_t was dropped.
* Source files are named forwarder.* rather than forwarder_device.* etc.

Thanks for the patch!
Martin