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carefully cleanup pointer cache after creating struct pointers

This commit is contained in:
Benjamin Peterson 2011-07-13 23:09:30 -05:00
parent 0ab67ee79e
commit 2e7ea507d6
1 changed files with 12 additions and 12 deletions
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24
Lib/ctypes/test/test_byteswap.py
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@ -1,4 +1,4 @@
import sys, unittest, struct, math
import sys, unittest, struct, math, ctypes
from binascii import hexlify
from ctypes import *
@ -188,16 +188,6 @@ class Test(unittest.TestCase):
# nested structures with different byteorders
# create nested structures with given byteorders and set memory to data
def set_structures(endianness, nested_endianness, data):
class NestedStructure(nested_endianness):
_fields_ = [("x", c_uint32),
("y", c_uint32)]
class TestStructure(endianness):
_fields_ = [("point", NestedStructure)]
self.assertEqual(len(data), sizeof(TestStructure))
return cast(data, POINTER(TestStructure))[0]
for nested, data in (
(BigEndianStructure, b'\0\0\0\1\0\0\0\2'),
@ -208,7 +198,17 @@ class Test(unittest.TestCase):
LittleEndianStructure,
Structure,
):
s = set_structures(parent, nested, data)
class NestedStructure(nested):
_fields_ = [("x", c_uint32),
("y", c_uint32)]
class TestStructure(parent):
_fields_ = [("point", NestedStructure)]
self.assertEqual(len(data), sizeof(TestStructure))
ptr = POINTER(TestStructure)
s = cast(data, ptr)[0]
del ctypes._pointer_type_cache[TestStructure]
self.assertEqual(s.point.x, 1)
self.assertEqual(s.point.y, 2)