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cdef class Owner:
cdef object x
cdef call_me_with_owner(Owner owner, x):
owner.x = "def" # overwrite external reference
return x # crashes if x is not owned by function or caller
def test_ext_type_attr():
"""
>>> test_ext_type_attr()
'abc5'
"""
owner = Owner()
owner.x = ''.join("abc%d" % 5) # non-interned object
return call_me_with_owner(owner, owner.x)
cdef void call_me_without_gil(Owner owner, x) with gil:
owner.x = "def" # overwrite external reference
print x # crashes if x is not owned by function or caller
def test_ext_type_attr_nogil():
"""
>>> test_ext_type_attr_nogil()
abc5
"""
owner = Owner()
owner.x = ''.join("abc%d" % 5) # non-interned object
with nogil:
call_me_without_gil(owner, owner.x)
# the following isn't dangerous as long as index access uses temps
cdef call_me_with_list(list l, x):
l[:] = [(1,2), (3,4)] # overwrite external reference
return x # crashes if x is not owned by function or caller
def test_index():
"""
>>> test_index()
[3, 4]
"""
l = [[1,2],[3,4]]
return call_me_with_list(l, l[1])
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