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Hard-coding smart_holder into classh.

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Ralf W. Grosse-Kunstleve 2021-01-11 15:37:23 -08:00
parent 03f304e419
commit c8d19f9599
1 changed files with 8 additions and 17 deletions
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25
include/pybind11/classh.h
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@ -1,23 +1,23 @@
#pragma once #pragma once
#include "smart_holder_poc.h"
#include "pybind11.h" #include "pybind11.h"
PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE) PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
template <typename type_, typename... options> template <typename type_, typename... options>
class classh : public detail::generic_type { class classh : public detail::generic_type {
template <typename T> using is_holder = detail::is_holder_type<type_, T>;
template <typename T> using is_subtype = detail::is_strict_base_of<type_, T>; template <typename T> using is_subtype = detail::is_strict_base_of<type_, T>;
template <typename T> using is_base = detail::is_strict_base_of<T, type_>; template <typename T> using is_base = detail::is_strict_base_of<T, type_>;
// struct instead of using here to help MSVC: // struct instead of using here to help MSVC:
template <typename T> struct is_valid_class_option : template <typename T> struct is_valid_class_option :
detail::any_of<is_holder<T>, is_subtype<T>, is_base<T>> {}; detail::any_of<is_subtype<T>, is_base<T>> {};
public: public:
using type = type_; using type = type_;
using type_alias = detail::exactly_one_t<is_subtype, void, options...>; using type_alias = detail::exactly_one_t<is_subtype, void, options...>;
constexpr static bool has_alias = !std::is_void<type_alias>::value; constexpr static bool has_alias = !std::is_void<type_alias>::value;
using holder_type = detail::exactly_one_t<is_holder, std::unique_ptr<type>, options...>; using holder_type = pybindit::memory::smart_holder;
static_assert(detail::all_of<is_valid_class_option<options>...>::value, static_assert(detail::all_of<is_valid_class_option<options>...>::value,
"Unknown/invalid classh template parameters provided"); "Unknown/invalid classh template parameters provided");
@ -48,7 +48,7 @@ public:
record.holder_size = sizeof(holder_type); record.holder_size = sizeof(holder_type);
record.init_instance = init_instance; record.init_instance = init_instance;
record.dealloc = dealloc; record.dealloc = dealloc;
record.default_holder = detail::is_instantiation<std::unique_ptr, holder_type>::value; record.default_holder = false;
set_operator_new<type>(&record); set_operator_new<type>(&record);
@ -271,7 +271,7 @@ private:
static void init_holder(detail::instance *inst, detail::value_and_holder &v_h, static void init_holder(detail::instance *inst, detail::value_and_holder &v_h,
const holder_type * /* unused */, const std::enable_shared_from_this<T> * /* dummy */) { const holder_type * /* unused */, const std::enable_shared_from_this<T> * /* dummy */) {
try { try {
auto sh = std::dynamic_pointer_cast<typename holder_type::element_type>( auto sh = std::dynamic_pointer_cast<type>( // Was: typename holder_type::element_type
v_h.value_ptr<type>()->shared_from_this()); v_h.value_ptr<type>()->shared_from_this());
if (sh) { if (sh) {
new (std::addressof(v_h.holder<holder_type>())) holder_type(std::move(sh)); new (std::addressof(v_h.holder<holder_type>())) holder_type(std::move(sh));
@ -285,24 +285,15 @@ private:
} }
} }
static void init_holder_from_existing(const detail::value_and_holder &v_h,
const holder_type *holder_ptr, std::true_type /*is_copy_constructible*/) {
new (std::addressof(v_h.holder<holder_type>())) holder_type(*reinterpret_cast<const holder_type *>(holder_ptr));
}
static void init_holder_from_existing(const detail::value_and_holder &v_h,
const holder_type *holder_ptr, std::false_type /*is_copy_constructible*/) {
new (std::addressof(v_h.holder<holder_type>())) holder_type(std::move(*const_cast<holder_type *>(holder_ptr)));
}
/// Initialize holder object, variant 2: try to construct from existing holder object, if possible /// Initialize holder object, variant 2: try to construct from existing holder object, if possible
static void init_holder(detail::instance *inst, detail::value_and_holder &v_h, static void init_holder(detail::instance *inst, detail::value_and_holder &v_h,
const holder_type *holder_ptr, const void * /* dummy -- not enable_shared_from_this<T>) */) { const holder_type *holder_ptr, const void * /* dummy -- not enable_shared_from_this<T>) */) {
if (holder_ptr) { if (holder_ptr) {
init_holder_from_existing(v_h, holder_ptr, std::is_copy_constructible<holder_type>()); new (std::addressof(v_h.holder<holder_type>())) holder_type(*reinterpret_cast<const holder_type *>(holder_ptr));
v_h.set_holder_constructed(); v_h.set_holder_constructed();
} else if (inst->owned || detail::always_construct_holder<holder_type>::value) { } else if (inst->owned || detail::always_construct_holder<holder_type>::value) {
new (std::addressof(v_h.holder<holder_type>())) holder_type(v_h.value_ptr<type>()); new (std::addressof(v_h.holder<holder_type>())) holder_type(
std::move(holder_type::from_raw_ptr_take_ownership(v_h.value_ptr<type>())));
v_h.set_holder_constructed(); v_h.set_holder_constructed();
} }
} }