multi-threaded allocation test

tests/CMakeLists.txt

@@ -46,6 +46,7 @@ nanobind_add_module(test_exception_ext test_exception.cpp ${NB_EXTRA_ARGS})
 nanobind_add_module(test_make_iterator_ext test_make_iterator.cpp ${NB_EXTRA_ARGS})
 nanobind_add_module(test_typing_ext test_typing.cpp ${NB_EXTRA_ARGS})
 nanobind_add_module(test_issue_ext test_issue.cpp ${NB_EXTRA_ARGS})
+nanobind_add_module(test_thread_ext test_thread.cpp ${NB_EXTRA_ARGS})
 
 foreach (NAME functions classes ndarray stl enum typing make_iterator)
   if (NAME STREQUAL typing)
@@ -120,6 +121,7 @@ set(TEST_FILES
   test_ndarray.py
   test_stubs.py
   test_typing.py
+  test_thread.py
 
   # Stub reference files
   test_classes_ext.pyi.ref

tests/test_thread.cpp

@@ -0,0 +1,16 @@
+#include <nanobind/nanobind.h>
+#include <atomic>
+
+namespace nb = nanobind;
+
+struct Counter {
+    std::atomic<size_t> counter { 0 };
+    void inc() { counter++; }
+};
+
+NB_MODULE(test_thread_ext, m) {
+    nb::class_<Counter>(m, "Counter")
+        .def(nb::init<>())
+        .def_prop_ro("counter", [](Counter &c) { return (size_t) c.counter; })
+        .def("inc", &Counter::inc);
+}