[Feature]: Is there any way to recv data directly to an existing buffer?

[noooop]

_recv_frame always creates a new Frame.

@cfunc
@inline
def _recv_frame(handle: p_void, flags: C.int = 0, track: bint = False) -> Frame:
    """Receive a message in a non-copying manner and return a Frame."""
    rc: C.int
    msg = zmq.Frame(track=track)
    cmsg: Frame = msg

    while True:
        with nogil:
            rc = zmq_msg_recv(address(cmsg.zmq_msg), handle, flags)
        try:
            _check_rc(rc)
        except InterruptedSystemCall:
            continue
        else:
            break
    return msg

This will result in one more copy of the data, which is not cool.

Is there any way to recv data directly to an existing buffer?

This way I can pass in the pre-allocated buffer instead of copying the data in the Frame to where it should go.

When using the C language API, you always need to prepare a buffer.

char buf [256];
nbytes = zmq_recv (socket, buf, 256, 0);
assert (nbytes != -1);

C language can always achieve all the things.