yglukhov
How to use it with multithreading?
I am playing around with Nim and python where I need to access python objects from different threads. In cython we get a handy with gil operator. Is there a way to access python objects in a similar way under Nimpy? Could you provide a minimal example?
Cheers! C
In particular I have this example I am running with:
code
import nimpy{.all.}, dynlib
import nimpy/py_lib {.all.}
import malebolgia
type PyGILState_STATE = enum PyGILState_LOCKED, PyGILState_UNLOCKED
{.pragma: pyfunc, cdecl, gcsafe.}
# initPyLibIfNeeded()
let
m = pythonLibHandleForThisProcess()
nx = pyImport("networkx")
PyGILState_Ensure = cast[proc(): PyGILState_STATE {.pyfunc.}](m.symAddr("PyGILState_Ensure"))
PyGILState_Release = cast[proc(s: PyGILState_STATE) {.pyfunc.}](m.symAddr("PyGILState_Release"))
template withGIL*(code) =
let state = Py_GILState_Ensure()
code
Py_GILState_Release(state)
withGil:
echo "in gil"
proc createG(idx: int) =
echo idx
withGil:
var g = nx.path_graph(3)
var master = createMaster()
master.awaitAll:
for idx in 0..1000:
master.spawn createG(idx)
echo "done"
unloadLib(m)
Just to clarify for future reader since the link is incorrect -> This is the correct link https://thefriendlyghost.nl/unleashedgil/
It's a great article that would be deserving of being added to this repo as a test / example or documentation (IMO)
Many thanks @Clonkk! Happy to provide a concrete test if @yglukhov wants to
