88 lines
2.4 KiB
Text
88 lines
2.4 KiB
Text
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/*
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// The MIT License (MIT)
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//
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// Copyright (c) 2015 Howard Hinnant
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//
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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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//
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// The above copyright notice and this permission notice shall be included in all
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// 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, 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 THE
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// SOFTWARE.
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*/
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#ifndef STACK_ALLOC_IPP
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#define STACK_ALLOC_IPP
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namespace jwt {
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template <size_t N, size_t alignment>
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template <size_t reqested_alignment>
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char* Arena<N, alignment>::allocate(size_t n) noexcept
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{
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static_assert (reqested_alignment <= alignment,
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"Requested alignment is too small for this arena");
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assert (pointer_in_storage(ptr_) &&
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"No more space in the arena or it has outgrown its capacity");
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n = align_up(n);
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if ((ptr_ + n) <= (buf_ + N)) {
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char* ret = ptr_;
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ptr_ += n;
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return ret;
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}
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assert (0 && "Code should not reach here");
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return nullptr;
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}
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template <size_t N, size_t alignment>
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void Arena<N, alignment>::deallocate(char* p, size_t n) noexcept
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{
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assert (pointer_in_storage(p) &&
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"The address to de deleted does not lie inside the storage");
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n = align_up(n);
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if ((p + n) == ptr_) {
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ptr_ = p;
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}
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return;
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}
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template <typename T, size_t N, size_t alignment>
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T* stack_alloc<T, N, alignment>::allocate(size_t n) noexcept
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{
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return reinterpret_cast<T*>(
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arena_.template allocate<alignof(T)>(n * sizeof(T))
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);
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}
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template <typename T, size_t N, size_t alignment>
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void stack_alloc<T, N, alignment>::deallocate(T* p, size_t n) noexcept
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{
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arena_.deallocate(reinterpret_cast<char*>(p), n);
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return;
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}
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}
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#endif
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