mirror of
https://github.com/pybind/pybind11.git
synced 2024-12-01 17:37:15 +00:00
123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
#include "pybind11_tests.h"
|
|
|
|
#include <pybind11/vptr_holder.h>
|
|
|
|
#include <iostream>
|
|
#include <memory>
|
|
|
|
namespace pybind11_tests {
|
|
namespace unique_ptr_member {
|
|
|
|
inline void to_cout(std::string text) { std::cout << text << std::endl; }
|
|
|
|
class pointee { // NOT copyable.
|
|
public:
|
|
pointee() = default;
|
|
|
|
int get_int() const {
|
|
to_cout("pointee::get_int()");
|
|
//TRIGGER_SEGSEV
|
|
return 213;
|
|
}
|
|
|
|
~pointee() { to_cout("~pointee()"); }
|
|
|
|
private:
|
|
pointee(const pointee &) = delete;
|
|
pointee(pointee &&) = delete;
|
|
pointee &operator=(const pointee &) = delete;
|
|
pointee &operator=(pointee &&) = delete;
|
|
};
|
|
|
|
inline std::unique_ptr<pointee> make_unique_pointee() {
|
|
return std::unique_ptr<pointee>(new pointee);
|
|
}
|
|
|
|
class ptr_owner {
|
|
public:
|
|
explicit ptr_owner(std::unique_ptr<pointee> ptr) : ptr_(std::move(ptr)) {}
|
|
|
|
bool is_owner() const { return bool(ptr_); }
|
|
|
|
std::unique_ptr<pointee> give_up_ownership_via_unique_ptr() {
|
|
return std::move(ptr_);
|
|
}
|
|
std::shared_ptr<pointee> give_up_ownership_via_shared_ptr() {
|
|
return std::move(ptr_);
|
|
}
|
|
|
|
private:
|
|
std::unique_ptr<pointee> ptr_;
|
|
};
|
|
|
|
// Just to have a minimal example of a typical C++ pattern.
|
|
inline int cpp_pattern() {
|
|
auto obj = make_unique_pointee();
|
|
int result = (obj ? 1 : 8);
|
|
obj->get_int();
|
|
ptr_owner owner(std::move(obj));
|
|
result = result * 10 + (obj ? 8 : 1);
|
|
result = result * 10 + (owner.is_owner() ? 1 : 8);
|
|
to_cout("before give up");
|
|
auto reclaimed = owner.give_up_ownership_via_shared_ptr();
|
|
to_cout("after give up");
|
|
result = result * 10 + (owner.is_owner() ? 8 : 1);
|
|
result = result * 10 + (reclaimed ? 1 : 8);
|
|
reclaimed.reset();
|
|
to_cout("after del");
|
|
result = result * 10 + (reclaimed ? 8 : 1);
|
|
return result;
|
|
}
|
|
|
|
} // namespace unique_ptr_member
|
|
} // namespace pybind11_tests
|
|
|
|
namespace pybind11 {
|
|
namespace detail {
|
|
template <>
|
|
struct type_caster<
|
|
std::unique_ptr<pybind11_tests::unique_ptr_member::pointee>> {
|
|
public:
|
|
PYBIND11_TYPE_CASTER(
|
|
std::unique_ptr<pybind11_tests::unique_ptr_member::pointee>,
|
|
_("std::unique_ptr<pybind11_tests::unique_ptr_member::pointee>"));
|
|
|
|
bool load(handle /* src */, bool) {
|
|
throw std::runtime_error("Not implemented: load");
|
|
}
|
|
|
|
static handle
|
|
cast(std::unique_ptr<pybind11_tests::unique_ptr_member::pointee> /* src */,
|
|
return_value_policy /* policy */, handle /* parent */) {
|
|
throw std::runtime_error("Not implemented: cast");
|
|
}
|
|
};
|
|
} // namespace detail
|
|
} // namespace pybind11
|
|
|
|
namespace pybind11_tests {
|
|
namespace unique_ptr_member {
|
|
|
|
TEST_SUBMODULE(unique_ptr_member, m) {
|
|
m.def("to_cout", to_cout);
|
|
|
|
py::class_<pointee, py::vptr_holder<pointee>>(m, "pointee")
|
|
.def(py::init<>())
|
|
.def("get_int", &pointee::get_int);
|
|
|
|
m.def("make_unique_pointee", make_unique_pointee);
|
|
|
|
py::class_<ptr_owner>(m, "ptr_owner")
|
|
.def(py::init<std::unique_ptr<pointee>>(), py::arg("ptr"))
|
|
.def("is_owner", &ptr_owner::is_owner)
|
|
.def("give_up_ownership_via_unique_ptr",
|
|
&ptr_owner::give_up_ownership_via_unique_ptr)
|
|
.def("give_up_ownership_via_shared_ptr",
|
|
&ptr_owner::give_up_ownership_via_shared_ptr);
|
|
|
|
m.def("cpp_pattern", cpp_pattern);
|
|
}
|
|
|
|
} // namespace unique_ptr_member
|
|
} // namespace pybind11_tests
|