…option_len is a pointer to an in/out variable. On input, it must specify the size of the output buffer. When uninitialized to a value smaller than the result of getsockopt, the method returns EINVAL.
…t driver is important and locking overhead is minimal since it is a mutex per socket. Stability is more important than performance (i.e., not pursuing random crashes like the previous source code).
…ve receive. Update test/comments based on testing.
… vector data structure for tracking NIF ZeroMQ socket requests without copying and realloc-ing for each poll loop iteration.
…ed from the NIF.
…es by removing underscore prefixes.