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Restore CPU kernel dispatch after unpickling contexts #190

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Merged
giadarol merged 1 commit into from
Oct 17, 2026
Merged

Restore CPU kernel dispatch after unpickling contexts #190

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11 changes: 10 additions & 1 deletion tests/test_kernel.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
# ########################################### #

import cffi
import pickle
import pytest
import sysconfig
from pathlib import Path
Expand All @@ -14,7 +15,8 @@
from xobjects.test_helpers import for_all_test_contexts, requires_context


def test_kernel_cpu():
@pytest.mark.parametrize('pickle_context', [False, True])
def test_kernel_cpu(pickle_context):
ctx = xo.ContextCpu()
src_code = r"""
double my_mul(const int n, const double* x1,
Expand Down Expand Up @@ -45,6 +47,13 @@ def test_kernel_cpu():

assert y == 285.0

if pickle_context:
restored = pickle.loads(pickle.dumps(ctx))
assert not restored.kernels
assert ctx.kernels.my_mul(n=len(a1), x1=a1, x2=a2) == 285.0
restored.add_kernels(sources=[src_code], kernels=kernel_descriptions)
assert restored.kernels.my_mul(n=len(a1), x1=a1, x2=a2) == 285.0


@for_all_test_contexts
def test_kernel_pointer_none_maps_to_null(test_context):
Expand Down
2 changes: 2 additions & 0 deletions xobjects/context_cpu.py
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Original file line number Diff line number Diff line change
Expand Up @@ -96,6 +96,7 @@ def kernel_compilation_help_message():

from .context import (
Kernel,
KernelDict,
ModuleNotAvailable,
SourceType,
XBuffer,
Expand Down Expand Up @@ -821,6 +822,7 @@ def __getstate__(self):

def __setstate__(self, state):
self.__dict__.update(state)
self._kernels = KernelDict(self._kernels)
self._buffers = weakref.WeakSet()


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