On Freitag, 6. Januar 2017 00:28:37 Hans-Peter Jansen wrote:
> Hi Eryk,
>
> This is exactly, what I was after:
>
> @contextmanager
> def cstructmap(cstruct, mm, offset = 0):
> # resize the mmap (and backing file), if structure exceeds mmap size
> # mmap size must be aligned to mmap.PAGESIZE
> cssize = ctypes.sizeof(cstruct)
> if offset + cssize > mm.size():
> newsize = align(offset + cssize, mmap.PAGESIZE)
> mm.resize(newsize)
> cmap = cstruct.from_buffer(mm, offset)
> try:
> yield cmap
> finally:
> for mv in cmap._objects.values():
if isinstance(mv, memoryview):
mv.release()
It happens, that _objects contain other objects as well...
Cheers,
Pete
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