Hi,
I started working on better malloc() support and wrote this code as a test
to get going:
"""
cimport cython
def test_malloc(int n):
with cython.malloc(n*sizeof(int)) as m:
for i in range(n):
m[i] = i
l = [ m[i] for i in range(n) ]
return l
"""
Now, when I compile this normally, I get a compiler error about "malloc"
not being a cython attribute. However, when I do the same in the test
runner, it compiles without errors and crashes when trying to run the test.
The code it generates for the 'with' statement above starts like this:
"""
__pyx_t_1 = PyObject_GetAttr(((PyObject *)malloc((__pyx_v_n *
(sizeof(int))))), __pyx_n_s____exit__); /*...*/
"""
It appears that something has declared malloc(). I'm pretty sure it's this
code in UtilityCode.py:
"""
def declare_in_scope(self, dest_scope, used=False, cython_scope=None):
"""
Declare all entries from the utility code in dest_scope. Code will
only be included for used entries. If module_name is given,
declare the type entries with that name.
"""
tree = self.get_tree(entries_only=True, cython_scope=cython_scope)
entries = tree.scope.entries
entries.pop('__name__')
entries.pop('__file__')
entries.pop('__builtins__')
entries.pop('__doc__')
for name, entry in entries.iteritems():
entry.utility_code_definition = self
entry.used = used
"""
Basically, it declares everything it finds except for an explicit
blacklist. Bad design. As I argued before, it should use a whitelist in the
utility code file instead, which specifically lists the names that should
be public. Everything else should just be considered implementation details.
Stefan
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