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Revert "Experiment: restoring original smart_holder_type_casters.h from smart_holder branch."
This reverts commit 19c5a3613fee71878ba2af0339eed325a5916089.
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2ae3c2ceb7
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@ -26,6 +26,11 @@
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#include <typeinfo>
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#include <utility>
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#ifdef JUNK
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# include <iostream>
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inline void to_cout(std::string msg) { std::cout << msg << std::endl; }
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#endif
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PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
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using pybindit::memory::smart_holder;
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@ -270,6 +275,31 @@ struct smart_holder_type_caster_class_hooks : smart_holder_type_caster_base_tag
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return &modified_type_caster_generic_load_impl::local_load;
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}
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using holder_type = pybindit::memory::smart_holder;
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#ifdef JUNK
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template <typename WrappedType>
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static bool try_initialization_using_shared_from_this(holder_type *, WrappedType *, ...) {
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return false;
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}
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#endif
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#ifdef JUNK
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template <typename WrappedType, typename AnyBaseOfWrappedType>
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static bool try_initialization_using_shared_from_this(
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holder_type *uninitialized_location,
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WrappedType *value_ptr_w_t,
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const std::enable_shared_from_this<AnyBaseOfWrappedType> *) {
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auto shd_ptr = std::dynamic_pointer_cast<WrappedType>(
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detail::try_get_shared_from_this(value_ptr_w_t));
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if (!shd_ptr)
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return false;
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// Note: inst->owned ignored.
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new (uninitialized_location) holder_type(holder_type::from_shared_ptr(shd_ptr));
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return true;
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}
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#endif
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template <typename WrappedType, typename AliasType>
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static void init_instance_for_type(detail::instance *inst, const void *holder_const_void_ptr) {
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// Need for const_cast is a consequence of the type_info::init_instance type:
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@ -281,17 +311,27 @@ struct smart_holder_type_caster_class_hooks : smart_holder_type_caster_base_tag
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register_instance(inst, v_h.value_ptr(), v_h.type);
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v_h.set_instance_registered();
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}
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using holder_type = pybindit::memory::smart_holder;
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if (holder_void_ptr) {
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// Note: inst->owned ignored.
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auto holder_ptr = static_cast<holder_type *>(holder_void_ptr);
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new (std::addressof(v_h.holder<holder_type>())) holder_type(std::move(*holder_ptr));
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} else if (inst->owned) {
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} else {
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#ifdef JUNK
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if (!try_initialization_using_shared_from_this(
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std::addressof(v_h.holder<holder_type>()),
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v_h.value_ptr<WrappedType>(),
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v_h.value_ptr<WrappedType>())) {
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#endif
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if (inst->owned) {
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new (std::addressof(v_h.holder<holder_type>())) holder_type(
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holder_type::from_raw_ptr_take_ownership(v_h.value_ptr<WrappedType>()));
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} else {
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new (std::addressof(v_h.holder<holder_type>()))
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holder_type(holder_type::from_raw_ptr_unowned(v_h.value_ptr<WrappedType>()));
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new (std::addressof(v_h.holder<holder_type>())) holder_type(
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holder_type::from_raw_ptr_unowned(v_h.value_ptr<WrappedType>()));
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}
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#ifdef JUNK
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}
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#endif
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}
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v_h.holder<holder_type>().pointee_depends_on_holder_owner
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= dynamic_raw_ptr_cast_if_possible<AliasType>(v_h.value_ptr<WrappedType>()) != nullptr;
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@ -364,11 +404,20 @@ struct smart_holder_type_caster_load {
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auto type_raw_ptr = convert_type(void_raw_ptr);
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if (holder().pointee_depends_on_holder_owner) {
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// Tie lifetime of trampoline Python part to C++ part (PR #2839).
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#ifdef JUNK
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to_cout("");
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to_cout("LOOOK " + std::to_string(__LINE__) + " " + __FILE__);
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#endif
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return std::shared_ptr<T>(
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type_raw_ptr,
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shared_ptr_dec_ref_deleter{
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handle((PyObject *) load_impl.loaded_v_h.inst).inc_ref()});
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}
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#ifdef JUNK
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if (holder().vptr_is_using_noop_deleter) {
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throw std::runtime_error("Non-owning holder (loaded_as_shared_ptr).");
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}
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#endif
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std::shared_ptr<void> void_shd_ptr = holder().template as_shared_ptr<void>();
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return std::shared_ptr<T>(void_shd_ptr, type_raw_ptr);
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}
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