def Pipe(duplex=True):
'''
Returns pair of connection objects at either end of a pipe
'''
address = arbitrary_address('AF_PIPE')
if duplex:
openmode = win32.PIPE_ACCESS_DUPLEX
access = win32.GENERIC_READ | win32.GENERIC_WRITE
obsize, ibsize = BUFSIZE, BUFSIZE
else:
openmode = win32.PIPE_ACCESS_INBOUND
access = win32.GENERIC_WRITE
obsize, ibsize = 0, BUFSIZE
h1 = win32.CreateNamedPipe(
address, openmode, win32.PIPE_TYPE_MESSAGE
| win32.PIPE_READMODE_MESSAGE | win32.PIPE_WAIT, 1, obsize, ibsize,
win32.NMPWAIT_WAIT_FOREVER, win32.NULL)
h2 = win32.CreateFile(address, access, 0, win32.NULL,
win32.OPEN_EXISTING, 0, win32.NULL)
win32.SetNamedPipeHandleState(h2, win32.PIPE_READMODE_MESSAGE, None,
None)
try:
win32.ConnectNamedPipe(h1, win32.NULL)
except WindowsError as e:
if e.args[0] != win32.ERROR_PIPE_CONNECTED:
raise
c1 = _multiprocessing.PipeConnection(h1, writable=duplex)
c2 = _multiprocessing.PipeConnection(h2, readable=duplex)
return c1, c2
class PipeListener(object):
'''
Representation of a named pipe
'''
def __init__(self, address, backlog=None):
self._address = address
handle = win32.CreateNamedPipe(
address, win32.PIPE_ACCESS_DUPLEX, win32.PIPE_TYPE_MESSAGE
| win32.PIPE_READMODE_MESSAGE | win32.PIPE_WAIT,
win32.PIPE_UNLIMITED_INSTANCES, BUFSIZE, BUFSIZE,
win32.NMPWAIT_WAIT_FOREVER, win32.NULL)
self._handle_queue = [handle]
self._last_accepted = None
sub_debug('listener created with address=%r', self._address)
self.close = Finalize(self,
PipeListener._finalize_pipe_listener,
args=(self._handle_queue, self._address),
exitpriority=0)
def accept(self):
newhandle = win32.CreateNamedPipe(
self._address, win32.PIPE_ACCESS_DUPLEX,
win32.PIPE_TYPE_MESSAGE | win32.PIPE_READMODE_MESSAGE
| win32.PIPE_WAIT, win32.PIPE_UNLIMITED_INSTANCES, BUFSIZE,
BUFSIZE, win32.NMPWAIT_WAIT_FOREVER, win32.NULL)
self._handle_queue.append(newhandle)
handle = self._handle_queue.pop(0)
try:
win32.ConnectNamedPipe(handle, win32.NULL)
except WindowsError, e:
if e.args[0] != win32.ERROR_PIPE_CONNECTED:
raise
return _multiprocessing.PipeConnection(handle)
def PipeClient(address):
'''
Return a connection object connected to the pipe given by `address`
'''
t = _init_timeout()
while 1:
try:
win32.WaitNamedPipe(address, 1000)
h = win32.CreateFile(address,
win32.GENERIC_READ | win32.GENERIC_WRITE,
0, win32.NULL, win32.OPEN_EXISTING, 0,
win32.NULL)
except WindowsError as e:
if e.args[0] not in (
win32.ERROR_SEM_TIMEOUT,
win32.ERROR_PIPE_BUSY) or _check_timeout(t):
raise
else:
break
else:
raise
win32.SetNamedPipeHandleState(h, win32.PIPE_READMODE_MESSAGE, None,
None)
return _multiprocessing.PipeConnection(h)
def test_repr(self):
import _multiprocessing
c = _multiprocessing.Connection(1)
assert repr(c) == '<read-write Connection, handle 1>'
if hasattr(_multiprocessing, 'PipeConnection'):
c = _multiprocessing.PipeConnection(1)
assert repr(c) == '<read-write PipeConnection, handle 1>'
def test_repr(self):
import _multiprocessing, os
fd = os.dup(1) # closed by Connection.__del__
c = _multiprocessing.Connection(fd)
assert repr(c) == '<read-write Connection, handle %d>' % fd
if hasattr(_multiprocessing, 'PipeConnection'):
fd = os.dup(1) # closed by PipeConnection.__del__
c = _multiprocessing.PipeConnection(fd)
assert repr(c) == '<read-write PipeConnection, handle %d>' % fd
def accept(self):
newhandle = win32.CreateNamedPipe(self._address, win32.PIPE_ACCESS_DUPLEX, win32.PIPE_TYPE_MESSAGE | win32.PIPE_READMODE_MESSAGE | win32.PIPE_WAIT, win32.PIPE_UNLIMITED_INSTANCES, BUFSIZE, BUFSIZE, win32.NMPWAIT_WAIT_FOREVER, win32.NULL)
self._handle_queue.append(newhandle)
handle = self._handle_queue.pop(0)
try:
win32.ConnectNamedPipe(handle, win32.NULL)
except WindowsError as e:
if e.args[0] != win32.ERROR_PIPE_CONNECTED:
raise
return _multiprocessing.PipeConnection(handle)
def accept(self):
newhandle = win32.CreateNamedPipe(
self._address, win32.PIPE_ACCESS_DUPLEX,
win32.PIPE_TYPE_MESSAGE | win32.PIPE_READMODE_MESSAGE
| win32.PIPE_WAIT, win32.PIPE_UNLIMITED_INSTANCES, BUFSIZE,
BUFSIZE, win32.NMPWAIT_WAIT_FOREVER, win32.NULL)
self._handle_queue.append(newhandle)
handle = self._handle_queue.pop(0)
try:
win32.ConnectNamedPipe(handle, win32.NULL)
except WindowsError as e:
# ERROR_NO_DATA can occur if a client has already connected,
# written data and then disconnected -- see Issue 14725.
if e.args[0] not in (win32.ERROR_PIPE_CONNECTED,
win32.ERROR_NO_DATA):
raise
return _multiprocessing.PipeConnection(handle)
h1 = win32.CreateNamedPipe(
address, openmode, win32.PIPE_TYPE_MESSAGE
| win32.PIPE_READMODE_MESSAGE | win32.PIPE_WAIT, 1, obsize, ibsize,
win32.NMPWAIT_WAIT_FOREVER, win32.NULL)
h2 = win32.CreateFile(address, access, 0, win32.NULL,
win32.OPEN_EXISTING, 0, win32.NULL)
win32.SetNamedPipeHandleState(h2, win32.PIPE_READMODE_MESSAGE, None,
None)
try:
win32.ConnectNamedPipe(h1, win32.NULL)
except WindowsError, e:
if e.args[0] != win32.ERROR_PIPE_CONNECTED:
raise
c1 = _multiprocessing.PipeConnection(h1, writable=duplex)
c2 = _multiprocessing.PipeConnection(h2, readable=duplex)
return c1, c2
#
# Definitions for connections based on sockets
#
class SocketListener(object):
'''
Representation of a socket which is bound to an address and listening
'''
def __init__(self, address, family, backlog=1):
def rebuild_pipe_connection(reduced_handle, readable, writable):
handle = rebuild_handle(reduced_handle)
return _multiprocessing.PipeConnection(handle,
readable=readable,
writable=writable)
def from_handle(cls, phandle, *args, **kwargs):
"""Create a :class:`PipeConnection` from pipe handle `phandle`"""
connection = _multiprocessing.PipeConnection(phandle)
return cls(connection, *args, **kwargs)