Exemplo n.º 1
0
/*
Receive a message part from a socket.

For a description of flags, see: http://api.zeromq.org/2-2:zmq-recv#toc2
*/
func (soc *Socket) RecvBytes(flags Flag) ([]byte, error) {
	if !soc.opened {
		return []byte{}, ErrorSocketClosed
	}
	var msg C.zmq_msg_t
	if i, err := C.zmq_msg_init(&msg); i != 0 {
		return []byte{}, errget(err)
	}
	defer C.zmq_msg_close(&msg)

	var size C.int
	var err error

	var i C.int
	i, err = C.zmq_recv(soc.soc, &msg, C.int(flags))
	if i == 0 {
		size = C.int(C.zmq_msg_size(&msg))
	} else {
		size = -1
	}

	if size < 0 {
		return []byte{}, errget(err)
	}
	if size == 0 {
		return []byte{}, nil
	}
	data := make([]byte, int(size))
	C.my_memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&msg), C.size_t(size))
	return data, nil
}
Exemplo n.º 2
0
// Receive a message from the socket.
// int zmq_recv (void *s, zmq_msg_t *msg, int flags);
func (s *Socket) Recv(flags SendRecvOption) (data []byte, err error) {
	// Allocate and initialise a new zmq_msg_t
	var m C.zmq_msg_t
	var rc C.int
	if rc, err = C.zmq_msg_init(&m); rc != 0 {
		err = casterr(err)
		return
	}
	defer C.zmq_msg_close(&m)
	// Receive into message
	if rc, err = C.zmq_recvmsg(s.s, &m, C.int(flags)); rc == -1 {
		err = casterr(err)
		return
	}
	err = nil
	// Copy message data into a byte array
	// FIXME Ideally this wouldn't require a copy.
	size := C.zmq_msg_size(&m)
	if size > 0 {
		data = make([]byte, int(size))
		C.memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&m), size)
	} else {
		data = nil
	}
	return
}
Exemplo n.º 3
0
// Receive a message from the socket.
// int zmq_recv (void *s, zmq_msg_t *msg, int flags);
func (s *zmqSocket) Recv(flags SendRecvOption) (data []byte, err error) {
	// Allocate and initialise a new zmq_msg_t
	err = nil
	var m C.zmq_msg_t
	if C.zmq_msg_init(&m) != 0 {
		println("init")
		err = errno()
		return
	}
	defer C.zmq_msg_close(&m)
	// Receive into message
	if C.zmq_recvmsg(s.s, &m, C.int(flags)) != 0 {
		println("recvmsg")
		err = errno()
		return
	}
	// Copy message data into a byte array
	// FIXME Ideally this wouldn't require a copy.
	size := C.zmq_msg_size(&m)
	if size > 0 {
		data = make([]byte, int(size))
		C.memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&m), size)
	} else {
		data = nil
	}
	return
}
Exemplo n.º 4
0
func (s *Socket) RecvEvent(flags SendRecvOption) (ty Event, addr string, ex int64, err error) {
	// Allocate and initialise a new zmq_msg_t
	var m C.zmq_msg_t
	var rc C.int
	if rc, err = C.zmq_msg_init(&m); rc != 0 {
		err = casterr(err)
		return
	}
	defer C.zmq_msg_close(&m)
	// Receive into message
	if rc, err = C.zmq_recvmsg(s.s, &m, C.int(flags)); rc == -1 {
		err = casterr(err)
		return
	}
	var ev *C.zmq_event_t
	size := C.zmq_msg_size(&m)
	if uintptr(size) != unsafe.Sizeof(*ev) {
		err = errors.New("Invalid event message received")
		return
	}
	err = nil

	ev = (*C.zmq_event_t)(C.zmq_msg_data(&m))
	ty = Event(ev.event)
	addr = C.GoString(C.ev_get_addr(ev))
	ex = int64(C.ev_get_extra(ev))
	return
}
Exemplo n.º 5
0
func fromMsg(msg *C.zmq_msg_t) []byte {
	defer C.zmq_msg_close(msg)
	return C.GoBytes(C.zmq_msg_data(msg), C.int(C.zmq_msg_size(msg)))
}
Exemplo n.º 6
0
func MessageSize(message ZMessage) int {
	return int(C.zmq_msg_size(message.Ptr))
}
Exemplo n.º 7
0
Arquivo: zmq.go Projeto: miffa/gozero
func (p *lzmqMessage) Size() int {
	// size_t always fits int, we do not allocate larger messages
	return int(C.zmq_msg_size(p.ptr()))
}