115 lines
2.6 KiB
C++
115 lines
2.6 KiB
C++
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/* Copyright (c) 2022 Advanced Micro Devices, Inc.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE. */
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#ifndef UTILS_HANDLE_H_
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#define UTILS_HANDLE_H_
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#include <type_traits>
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#include <utility>
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#include <cstddef>
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namespace rocmtools {
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template <typename T, typename D>
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class handle_t {
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T value_;
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bool will_delete_;
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public:
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handle_t() noexcept
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: will_delete_(false)
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{}
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template
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< typename U
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, std::enable_if_t<std::is_same<T, U>::value, bool> = true
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>
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handle_t(U &&v, bool const will_delete = true) noexcept
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: value_(std::move(v))
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, will_delete_(will_delete)
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{}
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// No copy construction or copy assignment of handles
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handle_t(handle_t const &) = delete;
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handle_t& operator=(handle_t const &) = delete;
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handle_t& operator=(handle_t &&h) noexcept
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{
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reset();
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value_ = std::move(h.value_);
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will_delete_ = h.will_delete_;
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h.release();
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return *this;
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}
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handle_t(handle_t &&h) noexcept
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: value_(std::move(h.value_))
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{
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h.release();
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}
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~handle_t() noexcept
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{
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reset();
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}
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T const& get() const noexcept
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{
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return value_;
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}
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typename std::add_lvalue_reference
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< typename std::remove_pointer<T>::type
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>::type
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operator*() const noexcept
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{
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return *value_;
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}
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T operator->() const noexcept
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{
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return value_;
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}
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T const& release() noexcept
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{
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will_delete_ = false;
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return get();
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}
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void reset() noexcept
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{
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if (will_delete_) {
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will_delete_ = false;
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D{}(value_);
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}
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}
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void reset(T &&v) noexcept
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{
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reset();
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value_ = std::move(v);
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will_delete_ = true;
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}
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};
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} // namespace rocmtools
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#endif // UTILS_HANDLE_H_
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