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Kirill Smelkov
cpython
Commits
89461ef8
Commit
89461ef8
authored
Mar 26, 2011
by
Mark Dickinson
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Issue #11675: Zero-out newly-created multiprocessing.[Raw]Array objects.
parent
211643b6
Changes
3
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3 changed files
with
22 additions
and
1 deletion
+22
-1
Lib/multiprocessing/sharedctypes.py
Lib/multiprocessing/sharedctypes.py
+3
-1
Lib/test/test_multiprocessing.py
Lib/test/test_multiprocessing.py
+15
-0
Misc/NEWS
Misc/NEWS
+4
-0
No files found.
Lib/multiprocessing/sharedctypes.py
View file @
89461ef8
...
...
@@ -80,7 +80,9 @@ def RawArray(typecode_or_type, size_or_initializer):
type_
=
typecode_to_type
.
get
(
typecode_or_type
,
typecode_or_type
)
if
isinstance
(
size_or_initializer
,
int
):
type_
=
type_
*
size_or_initializer
return
_new_value
(
type_
)
obj
=
_new_value
(
type_
)
ctypes
.
memset
(
ctypes
.
addressof
(
obj
),
0
,
ctypes
.
sizeof
(
obj
))
return
obj
else
:
type_
=
type_
*
len
(
size_or_initializer
)
result
=
_new_value
(
type_
)
...
...
Lib/test/test_multiprocessing.py
View file @
89461ef8
...
...
@@ -913,6 +913,21 @@ class _TestArray(BaseTestCase):
self
.
assertEqual
(
list
(
arr
[:]),
seq
)
@
unittest
.
skipIf
(
c_int
is
None
,
"requires _ctypes"
)
def
test_array_from_size
(
self
):
size
=
10
# Test for zeroing (see issue #11675).
# The repetition below strengthens the test by increasing the chances
# of previously allocated non-zero memory being used for the new array
# on the 2nd and 3rd loops.
for
_
in
range
(
3
):
arr
=
self
.
Array
(
'i'
,
size
)
self
.
assertEqual
(
len
(
arr
),
size
)
self
.
assertEqual
(
list
(
arr
),
[
0
]
*
size
)
arr
[:]
=
range
(
10
)
self
.
assertEqual
(
list
(
arr
),
list
(
range
(
10
)))
del
arr
@
unittest
.
skipIf
(
c_int
is
None
,
"requires _ctypes"
)
def
test_rawarray
(
self
):
self
.
test_array
(
raw
=
True
)
...
...
Misc/NEWS
View file @
89461ef8
...
...
@@ -10,6 +10,10 @@ What's New in Python 3.1.4?
Core and Builtins
-----------------
- Issue #11675: multiprocessing.[Raw]Array objects created from an integer size
are now zeroed on creation. This matches the behaviour specified by the
documentation.
- Issue #8651: PyArg_Parse*() functions raise an OverflowError if the file
doesn't have PY_SSIZE_T_CLEAN define and the size doesn't fit in an int
(length bigger than 2^31-1 bytes).
...
...
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