82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
// Copyright ⓒ 2018-2021 ThePhD.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// See https://github.com/ThePhD/out_ptr/blob/master/docs/out_ptr.adoc for documentation.
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#include <phd/handle.hpp>
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#include <ficapi/ficapi.hpp>
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#include <ztd/out_ptr.hpp>
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#include <assert.hpp>
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#include <type_traits>
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namespace ztd { namespace out_ptr {
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// this is the full out_ptr_t customization point
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// you can also specialize the inout_ptr_t for that template too
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template <typename T, typename D, typename Pointer, typename... Args>
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class inout_ptr_t<ztd::handle<T, D>, Pointer, Args...> : std::tuple<Args...> {
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private:
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using Smart = ztd::handle<T, D>;
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using source_pointer = pointer_of_or_t<Smart, Pointer>;
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using ArgsTuple = std::tuple<Args...>;
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using Base = ArgsTuple;
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Pointer* m_target_ptr;
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public:
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inout_ptr_t(Smart& s, Args... args) noexcept
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: Base(std::forward<Args>(args)...), m_target_ptr(static_cast<Pointer*>(static_cast<void*>(std::addressof(s.get())))) {
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}
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inout_ptr_t(inout_ptr_t&& right) noexcept
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: Base(std::move(right)), m_target_ptr(right.m_target_ptr) {
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right.m_target_ptr = nullptr;
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}
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inout_ptr_t& operator=(inout_ptr_t&& right) noexcept {
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Base::operator =(std::move(right));
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this->m_target_ptr = right.m_target_ptr;
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return *this;
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}
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operator Pointer*() const noexcept {
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return const_cast<Pointer*>(this->m_target_ptr);
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}
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~inout_ptr_t() noexcept {
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static_assert(sizeof...(Args) < 1, "you cannot reset the deleter or pass more arguments for handle<T, Deleter>!: it only takes one argument!");
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reset();
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}
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private:
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void reset() {
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// internal pointer has already been written into,
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// we are fine
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}
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};
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}} // namespace ztd::out_ptr
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int main() {
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ztd::handle<int*, ficapi::int_deleter> p(nullptr);
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ficapi_re_create(ztd::out_ptr::inout_ptr<void*>(p), ficapi_type::ficapi_type_int);
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int* rawp = static_cast<int*>(p.get());
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OUT_PTR_C_ASSERT(rawp != nullptr);
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OUT_PTR_C_ASSERT(*rawp == ficapi_get_dynamic_data());
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}
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