def test_pipe_overlapped(self):
h1, h2 = windows_utils.pipe(overlapped=(True, True))
try:
ov1 = _overlapped.Overlapped()
self.assertFalse(ov1.pending)
self.assertEqual(ov1.error, 0)
ov1.ReadFile(h1, 100)
self.assertTrue(ov1.pending)
self.assertEqual(ov1.error, _winapi.ERROR_IO_PENDING)
ERROR_IO_INCOMPLETE = 996
try:
ov1.getresult()
except OSError as e:
self.assertEqual(e.winerror, ERROR_IO_INCOMPLETE)
else:
raise RuntimeError('expected ERROR_IO_INCOMPLETE')
ov2 = _overlapped.Overlapped()
self.assertFalse(ov2.pending)
self.assertEqual(ov2.error, 0)
ov2.WriteFile(h2, b'hello')
self.assertIn(ov2.error, {0, _winapi.ERROR_IO_PENDING})
res = _winapi.WaitForMultipleObjects([ov2.event], False, 100)
self.assertEqual(res, _winapi.WAIT_OBJECT_0)
self.assertFalse(ov1.pending)
self.assertEqual(ov1.error, ERROR_IO_INCOMPLETE)
self.assertFalse(ov2.pending)
self.assertIn(ov2.error, {0, _winapi.ERROR_IO_PENDING})
self.assertEqual(ov1.getresult(), b'hello')
finally:
_winapi.CloseHandle(h1)
_winapi.CloseHandle(h2)
def _recv_bytes(self, maxsize=None):
if self._got_empty_message:
self._got_empty_message = False
return io.BytesIO()
else:
bsize = 128 if maxsize is None else min(maxsize, 128)
try:
ov, err = _winapi.ReadFile(self._handle,
bsize,
overlapped=True)
try:
if err == _winapi.ERROR_IO_PENDING:
waitres = _winapi.WaitForMultipleObjects(
[ov.event], False, INFINITE)
assert waitres == WAIT_OBJECT_0
except:
ov.cancel()
raise
finally:
nread, err = ov.GetOverlappedResult(True)
if err == 0:
f = io.BytesIO()
f.write(ov.getbuffer())
return f
elif err == _winapi.ERROR_MORE_DATA:
return self._get_more_data(ov, maxsize)
except OSError as e:
if e.winerror == _winapi.ERROR_BROKEN_PIPE:
raise EOFError
else:
raise
raise RuntimeError(
"shouldn't get here; expected KeyboardInterrupt")
def test_popen(self):
command = """if 1:
import sys
s = sys.stdin.readline()
sys.stdout.write(s.upper())
sys.stderr.write('stderr')
"""
msg = b'blah\n'
p = windows_utils.Popen([sys.executable, '-c', command],
stdin=windows_utils.PIPE,
stdout=windows_utils.PIPE,
stderr=windows_utils.PIPE)
for f in [p.stdin, p.stdout, p.stderr]:
self.assertIsInstance(f, windows_utils.PipeHandle)
ovin = _overlapped.Overlapped()
ovout = _overlapped.Overlapped()
overr = _overlapped.Overlapped()
ovin.WriteFile(p.stdin.handle, msg)
ovout.ReadFile(p.stdout.handle, 100)
overr.ReadFile(p.stderr.handle, 100)
events = [ovin.event, ovout.event, overr.event]
res = _winapi.WaitForMultipleObjects(events, True, 10000)
self.assertEqual(res, _winapi.WAIT_OBJECT_0)
self.assertFalse(ovout.pending)
self.assertFalse(overr.pending)
self.assertFalse(ovin.pending)
self.assertEqual(ovin.getresult(), len(msg))
out = ovout.getresult().rstrip()
err = overr.getresult().rstrip()
self.assertGreater(len(out), 0)
self.assertGreater(len(err), 0)
self.assertTrue(msg.upper().rstrip().startswith(out))
self.assertTrue(b'stderr'.startswith(err))
with p:
pass
def _send_bytes(self, buf):
ov, err = _winapi.WriteFile(self._handle, buf, overlapped=True)
try:
if err == _winapi.ERROR_IO_PENDING:
waitres = _winapi.WaitForMultipleObjects([ov.event], False,
INFINITE)
assert waitres == WAIT_OBJECT_0
except:
ov.cancel()
raise
finally:
nwritten, err = ov.GetOverlappedResult(True)
assert err == 0
assert nwritten == len(buf)
def test_popen(self):
command = r"""if 1:
import sys
s = sys.stdin.readline()
sys.stdout.write(s.upper())
sys.stderr.write('stderr')
"""
msg = b"blah\n"
p = windows_utils.Popen(
[sys.executable, '-c', command],
stdin=windows_utils.PIPE,
stdout=windows_utils.PIPE,
stderr=windows_utils.PIPE
)
for f in [p.stdin, p.stdout, p.stderr]:
self.assertIsInstance(f, windows_utils.PipeHandle)
ovin = _overlapped.Overlapped()
ovout = _overlapped.Overlapped()
overr = _overlapped.Overlapped()
ovin.WriteFile(p.stdin.handle, msg)
ovout.ReadFile(p.stdout.handle, 100)
overr.ReadFile(p.stderr.handle, 100)
events = [ovin.event, ovout.event, overr.event]
# Super-long timeout for slow buildbots.
res = _winapi.WaitForMultipleObjects(events, True, 10000)
self.assertEqual(res, _winapi.WAIT_OBJECT_0)
self.assertFalse(ovout.pending)
self.assertFalse(overr.pending)
self.assertFalse(ovin.pending)
self.assertEqual(ovin.getresult(), len(msg))
out = ovout.getresult().rstrip()
err = overr.getresult().rstrip()
self.assertGreater(len(out), 0)
self.assertGreater(len(err), 0)
# allow for partial reads...
self.assertTrue(msg.upper().rstrip().startswith(out))
self.assertTrue(b"stderr".startswith(err))
# The context manager calls wait() and closes resources
with p:
pass
def _exhaustive_wait(handles, timeout):
L = list(handles)
ready = []
while L:
res = _winapi.WaitForMultipleObjects(L, False, timeout)
if res == WAIT_TIMEOUT:
break
elif WAIT_OBJECT_0 <= res < WAIT_OBJECT_0 + len(L):
res -= WAIT_OBJECT_0
elif WAIT_ABANDONED_0 <= res < WAIT_ABANDONED_0 + len(L):
res -= WAIT_ABANDONED_0
else:
raise RuntimeError('Should not get here')
ready.append(L[res])
L = L[res + 1:]
timeout = 0
return ready
def _exhaustive_wait(handles, timeout):
# Return ALL handles which are currently signalled. (Only
# returning the first signalled might create starvation issues.)
L = list(handles)
ready = []
while L:
res = _winapi.WaitForMultipleObjects(L, False, timeout)
if res == WAIT_TIMEOUT:
break
elif WAIT_OBJECT_0 <= res < WAIT_OBJECT_0 + len(L):
res -= WAIT_OBJECT_0
elif WAIT_ABANDONED_0 <= res < WAIT_ABANDONED_0 + len(L):
res -= WAIT_ABANDONED_0
else:
raise RuntimeError('Should not get here')
ready.append(L[res])
L = L[res + 1:]
timeout = 0
return ready
def accept(self):
self._handle_queue.append(self._new_handle())
handle = self._handle_queue.pop(0)
try:
ov = _winapi.ConnectNamedPipe(handle, overlapped=True)
except OSError as e:
if e.winerror != _winapi.ERROR_NO_DATA:
raise
else:
try:
res = _winapi.WaitForMultipleObjects([ov.event], False,
INFINITE)
except:
ov.cancel()
_winapi.CloseHandle(handle)
raise
finally:
_, err = ov.GetOverlappedResult(True)
assert err == 0
return PipeConnection(handle)
def accept(self):
self._handle_queue.append(self._new_handle())
handle = self._handle_queue.pop(0)
try:
ov = _winapi.ConnectNamedPipe(handle, overlapped=True)
except OSError as e:
if e.winerror != _winapi.ERROR_NO_DATA:
raise
# ERROR_NO_DATA can occur if a client has already connected,
# written data and then disconnected -- see Issue 14725.
else:
try:
_winapi.WaitForMultipleObjects([ov.event], False, INFINITE)
except:
ov.cancel()
_winapi.CloseHandle(handle)
raise
finally:
_, err = ov.GetOverlappedResult(True)
assert err == 0
return PipeConnection(handle)
def dispatch(self):
rc = None
draining = False
while rc is None or draining:
if rc is None:
rc = self.proc.poll()
all_fileobj = []
if self.stdout is not None:
all_fileobj.append(self.stdout)
if self.stderr is not None:
all_fileobj.append(self.stderr)
if rc is None and self.io_handlers._hasInput(
) and self.stdin is not None:
all_fileobj.append(self.stdio)
draining = False
while rc is None or draining:
all_handles = [
msvcrt.get_osfhandle(fileobj.fileno())
for fileobj in all_fileobj
]
result = _winapi.WaitForMultipleObjects(all_handles, 0, 10)
print('result %r' % (result, ))
if result == _winapi.WAIT_TIMEOUT:
break
handle = all_handles[result]
fileobj = all_fileobj[result]
if fileobj == self.stdout:
try:
text, err = _winapi.ReadFile(handle, 128, 0)
if len(text) > 0:
draining = True
self.io_handlers._handleStdOut(
text.decode(sys.getdefaultencoding()))
except BrokenPipeError:
self.stdout = None
elif fileobj == self.stderr:
try:
text, err = _winapi.ReadFile(handle, 1024, 0)
assert err == 0
if len(text) > 0:
draining = True
self.io_handlers._handleStdErr(
text.decode(sys.getdefaultencoding()))
except BrokenPipeError:
self.stderr = None
elif fileobj == self.stdin:
written, err = _winapi.WriteFile(
handle,
self.io_handlers._getInput().encode(
sys.getdefaultencoding()), False)
self.io_handlers._dispatch()
return rc