| /* |
| tests/test_thread.cpp -- call pybind11 bound methods in threads |
| |
| Copyright (c) 2021 Laramie Leavitt (Google LLC) <lar@google.com> |
| |
| All rights reserved. Use of this source code is governed by a |
| BSD-style license that can be found in the LICENSE file. |
| */ |
| |
| #include <pybind11/cast.h> |
| #include <pybind11/pybind11.h> |
| |
| #include "pybind11_tests.h" |
| |
| #include <chrono> |
| #include <thread> |
| |
| namespace py = pybind11; |
| |
| namespace { |
| |
| struct IntStruct { |
| explicit IntStruct(int v) : value(v){}; |
| ~IntStruct() { value = -value; } |
| IntStruct(const IntStruct &) = default; |
| IntStruct &operator=(const IntStruct &) = default; |
| |
| int value; |
| }; |
| |
| } // namespace |
| |
| TEST_SUBMODULE(thread, m) { |
| |
| py::class_<IntStruct>(m, "IntStruct").def(py::init([](const int i) { return IntStruct(i); })); |
| |
| // implicitly_convertible uses loader_life_support when an implicit |
| // conversion is required in order to lifetime extend the reference. |
| // |
| // This test should be run with ASAN for better effectiveness. |
| py::implicitly_convertible<int, IntStruct>(); |
| |
| m.def("test", [](int expected, const IntStruct &in) { |
| { |
| py::gil_scoped_release release; |
| std::this_thread::sleep_for(std::chrono::milliseconds(5)); |
| } |
| |
| if (in.value != expected) { |
| throw std::runtime_error("Value changed!!"); |
| } |
| }); |
| |
| m.def( |
| "test_no_gil", |
| [](int expected, const IntStruct &in) { |
| std::this_thread::sleep_for(std::chrono::milliseconds(5)); |
| if (in.value != expected) { |
| throw std::runtime_error("Value changed!!"); |
| } |
| }, |
| py::call_guard<py::gil_scoped_release>()); |
| |
| // NOTE: std::string_view also uses loader_life_support to ensure that |
| // the string contents remain alive, but that's a C++ 17 feature. |
| } |