On 29 Jun, 05:11, Ryan Kelly <[email protected]> wrote:
> Very interesting idea. Will it work if accessed through ctypes?
>
> ticker = ctypes.c_int.in_dll(ctypes.pythonapi,"_Py_Ticker")
> ticker.value = 0x7fffffff
>
> Or does ctypes muck with the GIL in a way that would break this idea?
>
>>> ctypes.pythonapi
<PyDLL 'python dll', handle 1e000000 at 1ffead0>
It's a PyDLL, so it should not mock with the GIL.
from contextlib import contextmanager
import ctypes
_Py_Ticker = ctypes.c_int.in_dll(ctypes.pythonapi,"_Py_Ticker")
@contextmanager
def atomic():
tmp = _Py_Ticker.value
_Py_Ticker.value = 0x7fffffff
yield
_Py_Ticker.value = tmp - 1
Now we can do
with atomic():
# whatever
pass
Just make sure we don't call extension code that releases the GIL :)
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