/* int xs_recv (void *sck,void *buf,size_t len,int flags) */
func (sck *xsSocket) Recv(flags SocketOption) ([]byte, error, uint64) {
var msg C.xs_msg_t
r := C.xs_msg_init(&msg)
if r != 0 {
return nil, errno(), 0
}
defer C.xs_msg_close(&msg)
r = C.xs_recvmsg(sck.sck, &msg, C.int(flags))
if r == -1 {
return nil, errno(), 0
}
size := C.xs_msg_size(&msg)
var more uint64
more_size := C.size_t(unsafe.Sizeof(more))
C.xs_getmsgopt(&msg, C.XS_MORE, unsafe.Pointer(&more), &more_size)
if size > 0 {
data := make([]byte, int(size))
C.memcpy(unsafe.Pointer(&data[0]), C.xs_msg_data(&msg), size)
return data, nil, more
}
return nil, nil, more /* nothing to recv */
}
func (msg *xsMessage) Close() error {
r := C.xs_msg_close(&msg.msg)
if r == 0 {
return nil
}
return errno()
}
func (sck *xsSocket) SendMsg(msg Message, flags SocketOption) error {
/* do a zero-copy */
cmsg, err := msg.ZeroCopy()
if err != nil {
return err
}
r := C.xs_sendmsg(sck.sck, cmsg, C.int(flags))
if r == -1 {
C.xs_msg_close(cmsg)
return errno()
}
return nil
}