22 lines
642 B
Python
22 lines
642 B
Python
from weakref import ref
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class GcWeakrefs(object):
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def __init__(self, ffi):
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self.ffi = ffi
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self.data = {}
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def build(self, cdata, destructor):
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# make a new cdata of the same type as the original one
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new_cdata = self.ffi.cast(self.ffi._backend.typeof(cdata), cdata)
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#
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def remove(key):
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# careful, this function is not protected by any lock
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old_key = self.data.pop(index)
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assert old_key is key
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destructor(cdata)
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#
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key = ref(new_cdata, remove)
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index = object()
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self.data[index] = key
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return new_cdata
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