Python errno.ENOMEM属性代码示例

# 需要导入模块: import errno [as 别名]
# 或者: from errno import ENOMEM [as 别名]
def check_negative_errorcode(result, func, *args):
    """Error checker for funtions, which return negative error codes.

    If ``result`` is smaller than ``0``, it is interpreted as negative error
    code, and an appropriate exception is raised:

    - ``-ENOMEM`` raises a :exc:`~exceptions.MemoryError`
    - ``-EOVERFLOW`` raises a :exc:`~exceptions.OverflowError`
    - all other error codes raise :exc:`~exceptions.EnvironmentError`

    If result is greater or equal to ``0``, it is returned unchanged.

    """
    if result < 0:
        # udev returns the *negative* errno code at this point
        errnum = -result
        raise exception_from_errno(errnum)
    else:
        return result 

# 需要导入模块: import errno [as 别名]
# 或者: from errno import ENOMEM [as 别名]
def _accept_connection(self, protocol_factory, sock,
                           sslcontext=None, server=None):
        try:
            conn, addr = sock.accept()
            if self._debug:
                logger.debug("%r got a new connection from %r: %r",
                             server, addr, conn)
            conn.setblocking(False)
        except (BlockingIOError, InterruptedError, ConnectionAbortedError):
            pass  # False alarm.
        except OSError as exc:
            # There's nowhere to send the error, so just log it.
            if exc.errno in (errno.EMFILE, errno.ENFILE,
                             errno.ENOBUFS, errno.ENOMEM):
                # Some platforms (e.g. Linux keep reporting the FD as
                # ready, so we remove the read handler temporarily.
                # We'll try again in a while.
                self.call_exception_handler({
                    'message': 'socket.accept() out of system resource',
                    'exception': exc,
                    'socket': sock,
                })
                self.remove_reader(sock.fileno())
                self.call_later(constants.ACCEPT_RETRY_DELAY,
                                self._start_serving,
                                protocol_factory, sock, sslcontext, server)
            else:
                raise  # The event loop will catch, log and ignore it.
        else:
            extra = {'peername': addr}
            accept = self._accept_connection2(protocol_factory, conn, extra,
                                              sslcontext, server)
            self.create_task(accept) 

# 需要导入模块: import errno [as 别名]
# 或者: from errno import ENOMEM [as 别名]
def test_get_all_block_devices_when_oserror_is_not_enoent(self):
        driver = host_driver.HostDriver()
        oserror = OSError(errno.ENOMEM, "")
        with mock.patch('os.listdir', side_effect=oserror):
            self.assertRaises(OSError, driver.get_all_block_devices) 

# 需要导入模块: import errno [as 别名]
# 或者: from errno import ENOMEM [as 别名]
def nl_syserr2nlerr(error_):
    """https://github.com/thom311/libnl/blob/libnl3_2_25/lib/error.c#L84."""
    error_ = abs(error_)
    legend = {
        errno.EBADF: libnl.errno_.NLE_BAD_SOCK,
        errno.EADDRINUSE: libnl.errno_.NLE_EXIST,
        errno.EEXIST: libnl.errno_.NLE_EXIST,
        errno.EADDRNOTAVAIL: libnl.errno_.NLE_NOADDR,
        errno.ESRCH: libnl.errno_.NLE_OBJ_NOTFOUND,
        errno.ENOENT: libnl.errno_.NLE_OBJ_NOTFOUND,
        errno.EINTR: libnl.errno_.NLE_INTR,
        errno.EAGAIN: libnl.errno_.NLE_AGAIN,
        errno.ENOTSOCK: libnl.errno_.NLE_BAD_SOCK,
        errno.ENOPROTOOPT: libnl.errno_.NLE_INVAL,
        errno.EFAULT: libnl.errno_.NLE_INVAL,
        errno.EACCES: libnl.errno_.NLE_NOACCESS,
        errno.EINVAL: libnl.errno_.NLE_INVAL,
        errno.ENOBUFS: libnl.errno_.NLE_NOMEM,
        errno.ENOMEM: libnl.errno_.NLE_NOMEM,
        errno.EAFNOSUPPORT: libnl.errno_.NLE_AF_NOSUPPORT,
        errno.EPROTONOSUPPORT: libnl.errno_.NLE_PROTO_MISMATCH,
        errno.EOPNOTSUPP: libnl.errno_.NLE_OPNOTSUPP,
        errno.EPERM: libnl.errno_.NLE_PERM,
        errno.EBUSY: libnl.errno_.NLE_BUSY,
        errno.ERANGE: libnl.errno_.NLE_RANGE,
        errno.ENODEV: libnl.errno_.NLE_NODEV,
    }
    return int(legend.get(error_, libnl.errno_.NLE_FAILURE)) 

# 需要导入模块: import errno [as 别名]
# 或者: from errno import ENOMEM [as 别名]
def _accept_connection(self, protocol_factory, sock,
                           sslcontext=None, server=None, backlog=100):
        # This method is only called once for each event loop tick where the
        # listening socket has triggered an EVENT_READ. There may be multiple
        # connections waiting for an .accept() so it is called in a loop.
        # See https://bugs.python.org/issue27906 for more details.
        for _ in range(backlog):
            try:
                conn, addr = sock.accept()
                if self._debug:
                    logger.debug("%r got a new connection from %r: %r",
                                 server, addr, conn)
                conn.setblocking(False)
            except (BlockingIOError, InterruptedError, ConnectionAbortedError):
                # Early exit because the socket accept buffer is empty.
                return None
            except OSError as exc:
                # There's nowhere to send the error, so just log it.
                if exc.errno in (errno.EMFILE, errno.ENFILE,
                                 errno.ENOBUFS, errno.ENOMEM):
                    # Some platforms (e.g. Linux keep reporting the FD as
                    # ready, so we remove the read handler temporarily.
                    # We'll try again in a while.
                    self.call_exception_handler({
                        'message': 'socket.accept() out of system resource',
                        'exception': exc,
                        'socket': sock,
                    })
                    self._remove_reader(sock.fileno())
                    self.call_later(constants.ACCEPT_RETRY_DELAY,
                                    self._start_serving,
                                    protocol_factory, sock, sslcontext, server,
                                    backlog)
                else:
                    raise  # The event loop will catch, log and ignore it.
            else:
                extra = {'peername': addr}
                accept = self._accept_connection2(protocol_factory, conn, extra,
                                                  sslcontext, server)
                self.create_task(accept) 

# 需要导入模块: import errno [as 别名]
# 或者: from errno import ENOMEM [as 别名]
def test_mmap_allocate_error(self):
        """
        Regression test for https://github.com/astropy/astropy/issues/1380

        Temporarily patches mmap.mmap to raise an OSError if mode is ACCESS_COPY.
        """

        mmap_original = mmap.mmap

        # We patch mmap here to raise an error if access=mmap.ACCESS_COPY, which
        # emulates an issue that an OSError is raised if the available address
        # space is less than the size of the file even if memory mapping is used.

        def mmap_patched(*args, **kwargs):
            if kwargs.get('access') == mmap.ACCESS_COPY:
                exc = OSError()
                exc.errno = errno.ENOMEM
                raise exc
            else:
                return mmap_original(*args, **kwargs)

        with fits.open(self.data('test0.fits'), memmap=True) as hdulist:
            with patch.object(mmap, 'mmap', side_effect=mmap_patched) as p:
                with pytest.warns(AstropyUserWarning, match=r"Could not memory "
                                  r"map array with mode='readonly'"):
                    data = hdulist[1].data
                p.reset_mock()
            assert not data.flags.writeable 

# 需要导入模块: import errno [as 别名]
# 或者: from errno import ENOMEM [as 别名]
def _accept_connection(
            self, protocol_factory, sock,
            sslcontext=None, server=None, backlog=100,
            ssl_handshake_timeout=constants.SSL_HANDSHAKE_TIMEOUT):
        # This method is only called once for each event loop tick where the
        # listening socket has triggered an EVENT_READ. There may be multiple
        # connections waiting for an .accept() so it is called in a loop.
        # See https://bugs.python.org/issue27906 for more details.
        for _ in range(backlog):
            try:
                conn, addr = sock.accept()
                if self._debug:
                    logger.debug("%r got a new connection from %r: %r",
                                 server, addr, conn)
                conn.setblocking(False)
            except (BlockingIOError, InterruptedError, ConnectionAbortedError):
                # Early exit because the socket accept buffer is empty.
                return None
            except OSError as exc:
                # There's nowhere to send the error, so just log it.
                if exc.errno in (errno.EMFILE, errno.ENFILE,
                                 errno.ENOBUFS, errno.ENOMEM):
                    # Some platforms (e.g. Linux keep reporting the FD as
                    # ready, so we remove the read handler temporarily.
                    # We'll try again in a while.
                    self.call_exception_handler({
                        'message': 'socket.accept() out of system resource',
                        'exception': exc,
                        'socket': sock,
                    })
                    self._remove_reader(sock.fileno())
                    self.call_later(constants.ACCEPT_RETRY_DELAY,
                                    self._start_serving,
                                    protocol_factory, sock, sslcontext, server,
                                    backlog, ssl_handshake_timeout)
                else:
                    raise  # The event loop will catch, log and ignore it.
            else:
                extra = {'peername': addr}
                accept = self._accept_connection2(
                    protocol_factory, conn, extra, sslcontext, server,
                    ssl_handshake_timeout)
                self.create_task(accept) 

# 需要导入模块: import errno [as 别名]
# 或者: from errno import ENOMEM [as 别名]
def ndarray_shm(shape, dtype, location, readonly=False, order='F', **kwargs):
  """Create a shared memory numpy array. Requires /dev/shm to exist."""
  import posix_ipc
  from posix_ipc import O_CREAT
  import psutil

  nbytes = Vec(*shape).rectVolume() * np.dtype(dtype).itemsize
  available = psutil.virtual_memory().available

  preexisting = 0
  # This might only work on Ubuntu
  shmloc = os.path.join(SHM_DIRECTORY, location)
  if os.path.exists(shmloc):
    preexisting = os.path.getsize(shmloc)
  elif readonly:
    raise SharedMemoryReadError(shmloc + " has not been allocated. Requested " + str(nbytes) + " bytes.")

  if readonly and preexisting != nbytes:
    raise SharedMemoryReadError("{} exists, but the allocation size ({} bytes) does not match the request ({} bytes).".format(
      shmloc, preexisting, nbytes
    ))

  if (nbytes - preexisting) > available:
    overallocated = nbytes - preexisting - available
    overpercent = (100 * overallocated / (preexisting + available))
    raise SharedMemoryAllocationError("""
      Requested more memory than is available. 

      Shared Memory Location:  {}

      Shape:                   {}
      Requested Bytes:         {} 
      
      Available Bytes:         {} 
      Preexisting Bytes*:      {} 

      Overallocated Bytes*:    {} (+{:.2f}%)

      * Preexisting is only correct on linux systems that support /dev/shm/""" \
        .format(location, shape, nbytes, available, preexisting, overallocated, overpercent))

  # This might seem like we're being "extra safe" but consider
  # a threading condition where the condition of the shared memory
  # was adjusted between the check above and now. Better to make sure
  # that we don't accidently change anything if readonly is set.
  flags = 0 if readonly else O_CREAT 
  size = 0 if readonly else int(nbytes) 

  try:
    shared = posix_ipc.SharedMemory(location, flags=flags, size=size)
    array_like = mmap.mmap(shared.fd, shared.size)
    os.close(shared.fd)
    renderbuffer = np.ndarray(buffer=array_like, dtype=dtype, shape=shape, order=order, **kwargs)
  except OSError as err:
    if err.errno == errno.ENOMEM: # Out of Memory
      posix_ipc.unlink_shared_memory(location)      
    raise

  renderbuffer.setflags(write=(not readonly))
  return array_like, renderbuffer 

# 需要导入模块: import errno [as 别名]
# 或者: from errno import ENOMEM [as 别名]
def doRead(self):
        """Called when my socket is ready for reading.

        This accepts a connection and calls self.protocol() to handle the
        wire-level protocol.
        """
        try:
            if platformType == "posix":
                numAccepts = self.numberAccepts
            else:
                # win32 event loop breaks if we do more than one accept()
                # in an iteration of the event loop.
                numAccepts = 1
            for i in range(numAccepts):
                # we need this so we can deal with a factory's buildProtocol
                # calling our loseConnection
                if self.disconnecting:
                    return
                try:
                    skt, addr = self.socket.accept()
                except socket.error, e:
                    if e.args[0] in (EWOULDBLOCK, EAGAIN):
                        self.numberAccepts = i
                        break
                    elif e.args[0] == EPERM:
                        # Netfilter on Linux may have rejected the
                        # connection, but we get told to try to accept()
                        # anyway.
                        continue
                    elif e.args[0] in (EMFILE, ENOBUFS, ENFILE, ENOMEM, ECONNABORTED):

                        # Linux gives EMFILE when a process is not allowed
                        # to allocate any more file descriptors.  *BSD and
                        # Win32 give (WSA)ENOBUFS.  Linux can also give
                        # ENFILE if the system is out of inodes, or ENOMEM
                        # if there is insufficient memory to allocate a new
                        # dentry.  ECONNABORTED is documented as possible on
                        # both Linux and Windows, but it is not clear
                        # whether there are actually any circumstances under
                        # which it can happen (one might expect it to be
                        # possible if a client sends a FIN or RST after the
                        # server sends a SYN|ACK but before application code
                        # calls accept(2), however at least on Linux this
                        # _seems_ to be short-circuited by syncookies.

                        log.msg("Could not accept new connection (%s)" % (
                            errorcode[e.args[0]],))
                        break
                    raise

                fdesc._setCloseOnExec(skt.fileno())
                protocol = self.factory.buildProtocol(self._buildAddr(addr))
                if protocol is None:
                    skt.close()
                    continue
                s = self.sessionno
                self.sessionno = s+1
                transport = self.transport(skt, protocol, addr, self, s, self.reactor)
                transport = self._preMakeConnection(transport)
                protocol.makeConnection(transport)
            else: