libcruft-util/alloc/stack.hpp

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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2015 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_ALLOC_STACK_HPP
#define __UTIL_ALLOC_STACK_HPP
#include <cstddef>
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namespace util::alloc {
// allocate memory from a buffer in a stacklike manner. deallocation that
// is not correctly ordered has undefined (read 'bad') results.
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class stack {
public:
stack (const stack&) = delete;
stack (stack&&) = delete;
stack& operator= (const stack&) = delete;
stack& operator= (stack&&) = delete;
stack (void *begin, void *end);
void *allocate (size_t bytes, size_t alignment);
void *allocate (size_t bytes);
void deallocate (void *ptr, size_t bytes);
void deallocate (void *ptr, size_t bytes, size_t alignment);
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void* base (void);
const void* base (void) const;
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size_t offset (const void*) const;
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void reset (void);
size_t capacity (void) const;
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size_t used (void) const;
size_t remain (void) const;
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private:
char *m_begin, *m_end, *m_cursor;
};
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}
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#endif