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https://github.com/libretro/beetle-psx-libretro.git
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62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
/* Copyright (c) 2017-2018 Hans-Kristian Arntzen
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <algorithm>
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namespace Util
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{
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template <typename T, size_t N>
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class StackAllocator
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{
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public:
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T *allocate(size_t count)
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{
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if (count == 0)
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return nullptr;
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if (offset + count > N)
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return nullptr;
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T *ret = buffer + offset;
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offset += count;
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return ret;
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}
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T *allocate_cleared(size_t count)
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{
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T *ret = allocate(count);
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if (ret)
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std::fill(ret, ret + count, T());
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return ret;
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}
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void reset()
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{
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offset = 0;
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}
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private:
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T buffer[N];
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size_t offset = 0;
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};
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} |