mirror of https://github.com/axmolengine/axmol.git
85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
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/****************************************************************************
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Copyright (c) 2021 @denghe
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Copyright (c) 2019-present Axmol Engine contributors (see AUTHORS.md).
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https://axmol.dev/
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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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****************************************************************************/
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#pragma once
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#include <string.h>
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#include <utility>
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#include <new>
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#include <type_traits>
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namespace ax
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{
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struct any_buffer
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{
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any_buffer() = default;
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any_buffer(any_buffer const&) = delete;
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any_buffer& operator=(any_buffer const&) = delete;
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any_buffer(any_buffer&& o) noexcept
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{
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std::swap(buf, o.buf);
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std::swap(cap, o.cap);
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}
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any_buffer& operator=(any_buffer&& o) noexcept
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{
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std::swap(buf, o.buf);
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std::swap(cap, o.cap);
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return *this;
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}
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~any_buffer() { clear(); }
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template <typename T, std::enable_if_t<std::is_trivially_destructible_v<T>, int> = 0>
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T* get(size_t const& len)
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{
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auto newCap = sizeof(T) * len;
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if (newCap > cap)
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{
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clear();
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auto newBlock = malloc(newCap);
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if (newBlock)
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{
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this->buf = newBlock;
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this->cap = newCap;
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}
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else
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throw std::bad_alloc{};
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}
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return (T*)buf;
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}
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void clear()
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{
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if (cap)
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{
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free(buf);
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buf = nullptr;
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cap = 0;
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}
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}
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private:
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void* buf = nullptr;
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size_t cap = 0;
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};
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} // namespace ax
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