Danny Robson
7af076e2de
this allows the users to more easily walk the byte ranges (or perform simply pointer arithmetic), without as much danger of using the values in an expression inadvertantly.
68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
/*
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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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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef CRUFT_UTIL_ALLOC_RAW_STACK_HPP
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#define CRUFT_UTIL_ALLOC_RAW_STACK_HPP
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#include "../../view.hpp"
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#include <cstddef>
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namespace util::alloc::raw {
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// allocate memory from a buffer in a stacklike manner. deallocation that
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// is not correctly ordered has undefined (read 'bad') results.
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class stack {
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public:
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stack (const stack&) = delete;
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stack (stack&&) = delete;
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stack& operator= (const stack&) = delete;
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stack& operator= (stack&&) = delete;
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stack (void *begin, void *end);
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void *allocate (size_t bytes, size_t alignment);
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void *allocate (size_t bytes);
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void deallocate (void *ptr, size_t bytes);
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void deallocate (void *ptr, size_t bytes, size_t alignment);
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util::view<std::byte*> data (void);
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util::view<const std::byte*> data (void) const;
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std::byte* begin (void);
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const std::byte* begin (void) const;
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std::byte* end (void);
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const std::byte* end (void) const;
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size_t offset (const void*) const;
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void reset (void);
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size_t capacity (void) const;
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size_t used (void) const;
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size_t remain (void) const;
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private:
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std::byte *const m_begin;
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std::byte *const m_end;
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std::byte *m_cursor;
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};
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}
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#endif
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