_socket3.py 文件源码

def sendmsg(self, buffers, ancdata=(), flags=0, address=None):
            try:
                return _socket.socket.sendmsg(self._sock, buffers, ancdata, flags, address)
            except error as ex:
                if flags & getattr(_socket, 'MSG_DONTWAIT', 0):
                    # Enable non-blocking behaviour
                    # XXX: Do all platforms that have sendmsg have MSG_DONTWAIT?
                    raise

                if ex.args[0] != EWOULDBLOCK or self.timeout == 0.0:
                    raise
                self._wait(self._write_event)
                try:
                    return _socket.socket.sendmsg(self._sock, buffers, ancdata, flags, address)
                except error as ex2:
                    if ex2.args[0] == EWOULDBLOCK:
                        return 0
                    raise