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import unittest, os, errno
from ctypes import *
from ctypes.util import find_library
try:
import threading
except ImportError:
threading = None
class Test(unittest.TestCase):
def test_open(self):
libc_name = find_library("c")
if libc_name is None:
raise unittest.SkipTest("Unable to find C library")
libc = CDLL(libc_name, use_errno=True)
if os.name == "nt":
libc_open = libc._open
else:
libc_open = libc.open
libc_open.argtypes = c_char_p, c_int
self.assertEqual(libc_open(b"", 0), -1)
self.assertEqual(get_errno(), errno.ENOENT)
self.assertEqual(set_errno(32), errno.ENOENT)
self.assertEqual(get_errno(), 32)
if threading:
def _worker():
set_errno(0)
libc = CDLL(libc_name, use_errno=False)
if os.name == "nt":
libc_open = libc._open
else:
libc_open = libc.open
libc_open.argtypes = c_char_p, c_int
self.assertEqual(libc_open(b"", 0), -1)
self.assertEqual(get_errno(), 0)
t = threading.Thread(target=_worker)
t.start()
t.join()
self.assertEqual(get_errno(), 32)
set_errno(0)
@unittest.skipUnless(os.name == "nt", 'Test specific to Windows')
def test_GetLastError(self):
dll = WinDLL("kernel32", use_last_error=True)
GetModuleHandle = dll.GetModuleHandleA
GetModuleHandle.argtypes = [c_wchar_p]
self.assertEqual(0, GetModuleHandle("foo"))
self.assertEqual(get_last_error(), 126)
self.assertEqual(set_last_error(32), 126)
self.assertEqual(get_last_error(), 32)
def _worker():
set_last_error(0)
dll = WinDLL("kernel32", use_last_error=False)
GetModuleHandle = dll.GetModuleHandleW
GetModuleHandle.argtypes = [c_wchar_p]
GetModuleHandle("bar")
self.assertEqual(get_last_error(), 0)
t = threading.Thread(target=_worker)
t.start()
t.join()
self.assertEqual(get_last_error(), 32)
set_last_error(0)
if __name__ == "__main__":
unittest.main()