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, e:
if e.args[0] != win32.ERROR_PIPE_CONNECTED:
raise
def test_pipe(self):
from _multiprocessing import win32
import os
address = r'\\.\pipe\pypy-test-%s' % (os.getpid())
openmode = win32.PIPE_ACCESS_INBOUND
access = win32.GENERIC_WRITE
obsize, ibsize = 0, 8192
readhandle = win32.CreateNamedPipe(
address, openmode,
win32.PIPE_TYPE_MESSAGE | win32.PIPE_READMODE_MESSAGE |
win32.PIPE_WAIT,
1, obsize, ibsize, win32.NMPWAIT_WAIT_FOREVER, win32.NULL
)
writehandle = win32.CreateFile(
address, access, 0, win32.NULL, win32.OPEN_EXISTING, 0, win32.NULL
)
win32.SetNamedPipeHandleState(
writehandle, win32.PIPE_READMODE_MESSAGE, None, None)
try:
win32.ConnectNamedPipe(readhandle, win32.NULL)
except WindowsError as e:
if e.args[0] != win32.ERROR_PIPE_CONNECTED:
raise
timeout = 100
exc = raises(WindowsError, win32.WaitNamedPipe, address, timeout)
assert exc.value.winerror == 121 # ERROR_SEM_TIMEOUT
win32.CloseHandle(readhandle)
win32.CloseHandle(writehandle)
def Pipe(duplex=True):
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)
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)
return
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, 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
