本文整理汇总了Python中os.poll方法的典型用法代码示例。如果您正苦于以下问题：Python os.poll方法的具体用法？Python os.poll怎么用？Python os.poll使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类os的用法示例。
在下文中一共展示了os.poll方法的11个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_poll2
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll2(self):
cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done'
p = os.popen(cmd, 'r')
pollster = select.poll()
pollster.register( p, select.POLLIN )
for tout in (0, 1000, 2000, 4000, 8000, 16000) + (-1,)*10:
fdlist = pollster.poll(tout)
if (fdlist == []):
continue
fd, flags = fdlist[0]
if flags & select.POLLHUP:
line = p.readline()
if line != "":
self.fail('error: pipe seems to be closed, but still returns data')
continue
elif flags & select.POLLIN:
line = p.readline()
if not line:
break
continue
else:
self.fail('Unexpected return value from select.poll: %s' % fdlist)
p.close() 示例2: test_poll3
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll3(self):
# test int overflow
pollster = select.poll()
pollster.register(1)
self.assertRaises(OverflowError, pollster.poll, 1L << 64)
x = 2 + 3
if x != 5:
self.fail('Overflow must have occurred')
# Issues #15989, #17919
self.assertRaises(OverflowError, pollster.register, 0, -1)
self.assertRaises(OverflowError, pollster.register, 0, 1 << 64)
self.assertRaises(OverflowError, pollster.modify, 1, -1)
self.assertRaises(OverflowError, pollster.modify, 1, 1 << 64) 示例3: test_poll_blocks_with_negative_ms
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll_blocks_with_negative_ms(self):
for timeout_ms in [None, -1000, -1, -1.0]:
# Create two file descriptors. This will be used to unlock
# the blocking call to poll.poll inside the thread
r, w = os.pipe()
pollster = select.poll()
pollster.register(r, select.POLLIN)
poll_thread = threading.Thread(target=pollster.poll, args=(timeout_ms,))
poll_thread.start()
poll_thread.join(timeout=0.1)
self.assertTrue(poll_thread.is_alive())
# Write to the pipe so pollster.poll unblocks and the thread ends.
os.write(w, b'spam')
poll_thread.join()
self.assertFalse(poll_thread.is_alive())
os.close(r)
os.close(w) 示例4: test_poll3
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll3(self):
# test int overflow
pollster = select.poll()
pollster.register(1)
self.assertRaises(OverflowError, pollster.poll, 1L << 64)
x = 2 + 3
if x != 5:
self.fail('Overflow must have occurred')
pollster = select.poll()
# Issue 15989
self.assertRaises(OverflowError, pollster.register, 0,
_testcapi.SHRT_MAX + 1)
self.assertRaises(OverflowError, pollster.register, 0,
_testcapi.USHRT_MAX + 1)
self.assertRaises(OverflowError, pollster.poll, _testcapi.INT_MAX + 1)
self.assertRaises(OverflowError, pollster.poll, _testcapi.UINT_MAX + 1) 示例5: test_poll3
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll3(self):
# test int overflow
pollster = select.poll()
pollster.register(1)
self.assertRaises(OverflowError, pollster.poll, 1 << 64)
x = 2 + 3
if x != 5:
self.fail('Overflow must have occurred')
# Issues #15989, #17919
self.assertRaises(OverflowError, pollster.register, 0, -1)
self.assertRaises(OverflowError, pollster.register, 0, 1 << 64)
self.assertRaises(OverflowError, pollster.modify, 1, -1)
self.assertRaises(OverflowError, pollster.modify, 1, 1 << 64) 示例6: test_poll_blocks_with_negative_ms
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll_blocks_with_negative_ms(self):
for timeout_ms in [None, -1000, -1, -1.0, -0.1, -1e-100]:
# Create two file descriptors. This will be used to unlock
# the blocking call to poll.poll inside the thread
r, w = os.pipe()
pollster = select.poll()
pollster.register(r, select.POLLIN)
poll_thread = threading.Thread(target=pollster.poll, args=(timeout_ms,))
poll_thread.start()
poll_thread.join(timeout=0.1)
self.assertTrue(poll_thread.is_alive())
# Write to the pipe so pollster.poll unblocks and the thread ends.
os.write(w, b'spam')
poll_thread.join()
self.assertFalse(poll_thread.is_alive())
os.close(r)
os.close(w) 示例7: test_poll_c_limits
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll_c_limits(self):
from _testcapi import USHRT_MAX, INT_MAX, UINT_MAX
pollster = select.poll()
pollster.register(1)
# Issues #15989, #17919
self.assertRaises(OverflowError, pollster.register, 0, USHRT_MAX + 1)
self.assertRaises(OverflowError, pollster.modify, 1, USHRT_MAX + 1)
self.assertRaises(OverflowError, pollster.poll, INT_MAX + 1)
self.assertRaises(OverflowError, pollster.poll, UINT_MAX + 1) 示例8: test_poll2
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll2(self):
cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done'
proc = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,
bufsize=0)
p = proc.stdout
pollster = select.poll()
pollster.register( p, select.POLLIN )
for tout in (0, 1000, 2000, 4000, 8000, 16000) + (-1,)*10:
fdlist = pollster.poll(tout)
if (fdlist == []):
continue
fd, flags = fdlist[0]
if flags & select.POLLHUP:
line = p.readline()
if line != b"":
self.fail('error: pipe seems to be closed, but still returns data')
continue
elif flags & select.POLLIN:
line = p.readline()
if not line:
break
self.assertEqual(line, b'testing...\n')
continue
else:
self.fail('Unexpected return value from select.poll: %s' % fdlist)
p.close() 示例9: test_poll2
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll2(self):
cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done'
proc = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,
bufsize=0)
proc.__enter__()
self.addCleanup(proc.__exit__, None, None, None)
p = proc.stdout
pollster = select.poll()
pollster.register( p, select.POLLIN )
for tout in (0, 1000, 2000, 4000, 8000, 16000) + (-1,)*10:
fdlist = pollster.poll(tout)
if (fdlist == []):
continue
fd, flags = fdlist[0]
if flags & select.POLLHUP:
line = p.readline()
if line != b"":
self.fail('error: pipe seems to be closed, but still returns data')
continue
elif flags & select.POLLIN:
line = p.readline()
if not line:
break
self.assertEqual(line, b'testing...\n')
continue
else:
self.fail('Unexpected return value from select.poll: %s' % fdlist) 示例10: test_poll1
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def test_poll1(self):
# Basic functional test of poll object
# Create a bunch of pipe and test that poll works with them.
p = select.poll()
NUM_PIPES = 12
MSG = " This is a test."
MSG_LEN = len(MSG)
readers = []
writers = []
r2w = {}
w2r = {}
for i in range(NUM_PIPES):
rd, wr = os.pipe()
p.register(rd)
p.modify(rd, select.POLLIN)
p.register(wr, select.POLLOUT)
readers.append(rd)
writers.append(wr)
r2w[rd] = wr
w2r[wr] = rd
bufs = []
while writers:
ready = p.poll()
ready_writers = find_ready_matching(ready, select.POLLOUT)
if not ready_writers:
raise RuntimeError, "no pipes ready for writing"
wr = random.choice(ready_writers)
os.write(wr, MSG)
ready = p.poll()
ready_readers = find_ready_matching(ready, select.POLLIN)
if not ready_readers:
raise RuntimeError, "no pipes ready for reading"
rd = random.choice(ready_readers)
buf = os.read(rd, MSG_LEN)
self.assertEqual(len(buf), MSG_LEN)
bufs.append(buf)
os.close(r2w[rd]) ; os.close( rd )
p.unregister( r2w[rd] )
p.unregister( rd )
writers.remove(r2w[rd])
self.assertEqual(bufs, [MSG] * NUM_PIPES) 示例11: poll_unit_tests
# 需要导入模块: import os [as 别名]
# 或者: from os import poll [as 别名]
def poll_unit_tests(self):
# returns NVAL for invalid file descriptor
FD = 42
try:
os.close(FD)
except OSError:
pass
p = select.poll()
p.register(FD)
r = p.poll()
self.assertEqual(r[0], (FD, select.POLLNVAL))
f = open(TESTFN, 'w')
fd = f.fileno()
p = select.poll()
p.register(f)
r = p.poll()
self.assertEqual(r[0][0], fd)
f.close()
r = p.poll()
self.assertEqual(r[0], (fd, select.POLLNVAL))
os.unlink(TESTFN)
# type error for invalid arguments
p = select.poll()
self.assertRaises(TypeError, p.register, p)
self.assertRaises(TypeError, p.unregister, p)
# can't unregister non-existent object
p = select.poll()
self.assertRaises(KeyError, p.unregister, 3)
# Test error cases
pollster = select.poll()
class Nope:
pass
class Almost:
def fileno(self):
return 'fileno'
self.assertRaises(TypeError, pollster.register, Nope(), 0)
self.assertRaises(TypeError, pollster.register, Almost(), 0)
# Another test case for poll(). This is copied from the test case for
# select(), modified to use poll() instead.