zmq.ctx.new() returns an R external pointer (ctx)
generated by ZMQ C API pointing to a context if successful, otherwise
returns an R NULL.zmq.ctx.destroy() returns 0 if successful, otherwise returns -1 and
sets errno to either EFAULT or EINTR.
Details
zmq.ctx.new() initializes a ZMQ context for starting communication.
zmq.ctx.destroy() terminates the context for stopping communication.