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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
__init__.py	1.47 KB	-rw-r--r--
array.py	9.31 KB	-rw-r--r--
basics.py	9.15 KB	-rw-r--r--
builtin.py	1.21 KB	-rw-r--r--
dll.py	191 B	-rw-r--r--
dummy.py	118 B	-rw-r--r--
function.py	24.89 KB	-rw-r--r--
keepalive.txt	1005 B	-rw-r--r--
pointer.py	6.35 KB	-rw-r--r--
primitive.py	14.29 KB	-rw-r--r--
structure.py	11.63 KB	-rw-r--r--
union.py	167 B	-rw-r--r--

Few rules about ctypes keepalives:

* Ownership: the memory is freed when owner of this memory is deleted.
  Owner is the one who allocated the memory. So if we have:

a = c_int(3)
  b = c_int.from_address(a._buffer.buffer) # pypy notion of address access

only a frees memory.

* _objects: each ctypes object has (eventually) _objects dictionary in which
  it simply keeps objects to be kept alive.

* there are (some) rules about when to put stuff in it's objects when
  accessing the fields etc. need to list them here.

* each object has _objects dictionary. In this dict stuff is stored per
    key, which should be a tuple of indices of storages.

places storing stuff in _objects:

* array item assignement, if we share the storage

* pointer item assignement, if we share the storage

* getitem on CDLL stores function pointer

* CFuncPtr.__new__ (assuming that it's a ctypes callable), stores itself
  (XXX???)

* set contents on pointer

* set value on primitive or __init__ on primitive