pool.py 文件源码

def _raise_connection_failure(self, error):
        # Catch *all* exceptions from socket methods and close the socket. In
        # regular Python, socket operations only raise socket.error, even if
        # the underlying cause was a Ctrl-C: a signal raised during socket.recv
        # is expressed as an EINTR error from poll. See internal_select_ex() in
        # socketmodule.c. All error codes from poll become socket.error at
        # first. Eventually in PyEval_EvalFrameEx the interpreter checks for
        # signals and throws KeyboardInterrupt into the current frame on the
        # main thread.
        #
        # But in Gevent and Eventlet, the polling mechanism (epoll, kqueue,
        # ...) is called in Python code, which experiences the signal as a
        # KeyboardInterrupt from the start, rather than as an initial
        # socket.error, so we catch that, close the socket, and reraise it.
        self.close()
        if isinstance(error, socket.error):
            _raise_connection_failure(self.address, error)
        else:
            raise error