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Adding from_raw_pointer_take_ownership_or_shared_from_this().

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Ralf W. Grosse-Kunstleve
2021-06-02 16:11:21 -07:00
committed by Ralf W. Grosse-Kunstleve
parent 2a265860a7
commit 775873d0b6
3 changed files with 35 additions and 16 deletions
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31
include/pybind11/detail/smart_holder_type_casters.h
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@@ -270,6 +270,30 @@ struct smart_holder_type_caster_class_hooks : smart_holder_type_caster_base_tag
return &modified_type_caster_generic_load_impl::local_load;
}
using holder_type = pybindit::memory::smart_holder;
template <typename WrappedType>
static void from_raw_pointer_take_ownership_or_shared_from_this(
holder_type *uninitialized_location, WrappedType *value_ptr, ...) {
new (uninitialized_location)
holder_type(holder_type::from_raw_ptr_take_ownership(value_ptr));
}
template <typename WrappedType, typename AnyBaseOfWrappedType>
static void from_raw_pointer_take_ownership_or_shared_from_this(
holder_type *uninitialized_location,
WrappedType *value_ptr,
const std::enable_shared_from_this<AnyBaseOfWrappedType> *) {
auto shd_ptr
= std::dynamic_pointer_cast<WrappedType>(detail::try_get_shared_from_this(value_ptr));
if (shd_ptr) {
new (uninitialized_location) holder_type(holder_type::from_shared_ptr(shd_ptr));
} else {
new (uninitialized_location)
holder_type(holder_type::from_shared_ptr(std::shared_ptr<WrappedType>(value_ptr)));
}
}
template <typename WrappedType, typename AliasType>
static void init_instance_for_type(detail::instance *inst, const void *holder_const_void_ptr) {
// Need for const_cast is a consequence of the type_info::init_instance type:
@@ -281,14 +305,15 @@ struct smart_holder_type_caster_class_hooks : smart_holder_type_caster_base_tag
register_instance(inst, v_h.value_ptr(), v_h.type);
v_h.set_instance_registered();
}
using holder_type = pybindit::memory::smart_holder;
if (holder_void_ptr) {
// Note: inst->owned ignored.
auto holder_ptr = static_cast<holder_type *>(holder_void_ptr);
new (std::addressof(v_h.holder<holder_type>())) holder_type(std::move(*holder_ptr));
} else if (inst->owned) {
new (std::addressof(v_h.holder<holder_type>())) holder_type(
holder_type::from_raw_ptr_take_ownership(v_h.value_ptr<WrappedType>()));
from_raw_pointer_take_ownership_or_shared_from_this(
std::addressof(v_h.holder<holder_type>()),
v_h.value_ptr<WrappedType>(),
v_h.value_ptr<WrappedType>());
} else {
new (std::addressof(v_h.holder<holder_type>()))
holder_type(holder_type::from_raw_ptr_unowned(v_h.value_ptr<WrappedType>()));