mirror of
https://github.com/pybind/pybind11.git
synced 2024-11-26 23:22:01 +00:00
95 lines
3.1 KiB
Python
95 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
|
|
import multiprocessing
|
|
import threading
|
|
|
|
from pybind11_tests import gil_scoped as m
|
|
|
|
|
|
def _run_in_process(target, *args, **kwargs):
|
|
"""Runs target in process and returns its exitcode after 10s (None if still alive)."""
|
|
process = multiprocessing.Process(target=target, args=args, kwargs=kwargs)
|
|
process.daemon = True
|
|
try:
|
|
process.start()
|
|
# Do not need to wait much, 10s should be more than enough.
|
|
process.join(timeout=10)
|
|
return process.exitcode
|
|
finally:
|
|
if process.is_alive():
|
|
process.terminate()
|
|
|
|
|
|
def _python_to_cpp_to_python():
|
|
"""Calls different C++ functions that come back to Python."""
|
|
|
|
class ExtendedVirtClass(m.VirtClass):
|
|
def virtual_func(self):
|
|
pass
|
|
|
|
def pure_virtual_func(self):
|
|
pass
|
|
|
|
extended = ExtendedVirtClass()
|
|
m.test_callback_py_obj(lambda: None)
|
|
m.test_callback_std_func(lambda: None)
|
|
m.test_callback_virtual_func(extended)
|
|
m.test_callback_pure_virtual_func(extended)
|
|
|
|
|
|
def _python_to_cpp_to_python_from_threads(num_threads, parallel=False):
|
|
"""Calls different C++ functions that come back to Python, from Python threads."""
|
|
threads = []
|
|
for _ in range(num_threads):
|
|
thread = threading.Thread(target=_python_to_cpp_to_python)
|
|
thread.daemon = True
|
|
thread.start()
|
|
if parallel:
|
|
threads.append(thread)
|
|
else:
|
|
thread.join()
|
|
for thread in threads:
|
|
thread.join()
|
|
|
|
|
|
# TODO: FIXME, sometimes returns -11 (segfault) instead of 0 on macOS Python 3.9
|
|
def test_python_to_cpp_to_python_from_thread():
|
|
"""Makes sure there is no GIL deadlock when running in a thread.
|
|
|
|
It runs in a separate process to be able to stop and assert if it deadlocks.
|
|
"""
|
|
assert _run_in_process(_python_to_cpp_to_python_from_threads, 1) == 0
|
|
|
|
|
|
# TODO: FIXME on macOS Python 3.9
|
|
def test_python_to_cpp_to_python_from_thread_multiple_parallel():
|
|
"""Makes sure there is no GIL deadlock when running in a thread multiple times in parallel.
|
|
|
|
It runs in a separate process to be able to stop and assert if it deadlocks.
|
|
"""
|
|
assert _run_in_process(_python_to_cpp_to_python_from_threads, 8, parallel=True) == 0
|
|
|
|
|
|
# TODO: FIXME on macOS Python 3.9
|
|
def test_python_to_cpp_to_python_from_thread_multiple_sequential():
|
|
"""Makes sure there is no GIL deadlock when running in a thread multiple times sequentially.
|
|
|
|
It runs in a separate process to be able to stop and assert if it deadlocks.
|
|
"""
|
|
assert (
|
|
_run_in_process(_python_to_cpp_to_python_from_threads, 8, parallel=False) == 0
|
|
)
|
|
|
|
|
|
# TODO: FIXME on macOS Python 3.9
|
|
def test_python_to_cpp_to_python_from_process():
|
|
"""Makes sure there is no GIL deadlock when using processes.
|
|
|
|
This test is for completion, but it was never an issue.
|
|
"""
|
|
assert _run_in_process(_python_to_cpp_to_python) == 0
|
|
|
|
|
|
def test_cross_module_gil():
|
|
"""Makes sure that the GIL can be acquired by another module from a GIL-released state."""
|
|
m.test_cross_module_gil() # Should not raise a SIGSEGV
|