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#pragma once
#include "borrowed-ptr.hpp"
#include "compat/assert.hpp"
#include <utility>
#define FM_BPTR_DEBUG
#ifdef __CLION_IDE__
#define fm_bptr_assert(...) (void(__VA_ARGS__))
#elif defined FM_BPTR_DEBUG && !defined FM_NO_DEBUG
#define fm_bptr_assert(...) fm_assert(__VA_ARGS__)
#else
#define fm_bptr_assert(...) void()
#endif
#ifdef __GNUG__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#endif
namespace floormat::detail_borrowed_ptr {
#ifdef __GNUG__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
#endif
struct control_block
{
bptr_base* _ptr;
uint32_t _count;
static void decrement(control_block*& blk) noexcept;
};
#ifdef __GNUG__
#pragma GCC diagnostic pop
#endif
} // namespace floormat::detail_borrowed_ptr
namespace floormat {
template<typename T>
template<typename... Ts>
requires std::is_constructible_v<T, Ts&&...>
bptr<T>::bptr(InPlaceInitT, Ts&&... args) noexcept:
bptr{ new T{ forward<Ts...>(args...) } }
{
}
template<typename T> bptr<T>::bptr(std::nullptr_t) noexcept: blk{nullptr} {}
template<typename T> bptr<T>::bptr() noexcept: bptr{nullptr} {}
template<typename T>
bptr<T>::bptr(T* ptr) noexcept:
blk{ptr ? new detail_borrowed_ptr::control_block{ptr, 1} : nullptr}
{
fm_bptr_assert(!blk || blk->_count == 1 && blk->_ptr);
}
template<typename T>
bptr<T>::~bptr() noexcept
{
if (blk)
blk->decrement(blk);
}
template<typename T> bptr<T>::bptr(const bptr& other) noexcept: bptr{other, private_tag} {}
template<typename T> bptr<T>& bptr<T>::operator=(const bptr& other) noexcept { return _copy_assign(other); }
template<typename T>
template<detail_borrowed_ptr::DerivedFrom<T> Y>
bptr<T>::bptr(const bptr<Y>& other) noexcept: bptr{other, private_tag} {}
template<typename T>
template<detail_borrowed_ptr::DerivedFrom<T> Y>
bptr<T>& bptr<T>::operator=(const bptr<Y>& other) noexcept
{ return _copy_assign(other); }
template<typename T> bptr<T>& bptr<T>::operator=(bptr&& other) noexcept { return _move_assign(move(other)); }
template<typename T> bptr<T>::bptr(bptr&& other) noexcept: bptr{move(other), private_tag} {}
template<typename T>
template<detail_borrowed_ptr::DerivedFrom<T> Y>
bptr<T>::bptr(bptr<Y>&& other) noexcept: bptr{move(other), private_tag} {}
template<typename T>
template<detail_borrowed_ptr::DerivedFrom<T> Y>
bptr<T>& bptr<T>::operator=(bptr<Y>&& other) noexcept
{ return _move_assign(move(other)); }
template<typename T>
void bptr<T>::reset() noexcept
{
if (blk)
{
blk->decrement(blk);
blk = nullptr;
}
}
template<typename T>
void bptr<T>::destroy() noexcept
{
if (!blk)
return;
delete blk->_ptr;
blk->_ptr = nullptr;
}
template<typename T> bptr<T>& bptr<T>::operator=(std::nullptr_t) noexcept { reset(); return *this; }
template<typename T>
template<typename Y>
bptr<T>::bptr(const bptr<Y>& other, private_tag_t) noexcept:
blk{other.blk}
{
if (blk)
{
++blk->_count;
fm_bptr_assert(blk->_count > 1);
}
}
template<typename T>
template<typename Y>
bptr<T>& bptr<T>::_copy_assign(const bptr<Y>& other) noexcept
{
if (blk != other.blk)
{
CORRADE_ASSUME(this != &other); // todo! see if helps
if (blk)
blk->decrement(blk);
blk = other.blk;
if (blk)
++blk->_count;
}
return *this;
}
template<typename T>
template<typename Y>
bptr<T>::bptr(bptr<Y>&& other, private_tag_t) noexcept:
blk{other.blk}
{
other.blk = nullptr;
}
template<typename T>
template<typename Y>
bptr<T>& bptr<T>::_move_assign(bptr<Y>&& other) noexcept
{
if (blk)
blk->decrement(blk);
blk = other.blk;
other.blk = nullptr;
return *this;
}
template<typename T> T* bptr<T>::get() const noexcept
{
if (blk) [[likely]]
return static_cast<T*>(blk->_ptr);
else
return nullptr;
}
template<typename T> T* bptr<T>::operator->() const noexcept
{
auto* ret = get();
fm_bptr_assert(ret);
return ret;
}
template<typename T> T& bptr<T>::operator*() const noexcept { return *operator->(); }
template<typename T> bool operator==(const bptr<T>& a, const bptr<T>& b) noexcept { return a.get() == b.get(); }
template<typename T> bptr<T>::operator bool() const noexcept { return get(); }
template<typename T>
void bptr<T>::swap(bptr& other) noexcept
{
using floormat::swap;
swap(blk, other.blk);
}
template<typename T> uint32_t bptr<T>::use_count() const noexcept
{
if (blk && blk->_ptr) [[likely]]
return blk->_count;
else
return 0;
}
} // namespace floormat
#ifdef __GNUG__
#pragma GCC diagnostic pop
#endif
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