99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
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/*-
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* Copyright (c) 2013 Cosku Acay, http://www.coskuacay.com
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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
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* 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, 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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef MEMORY_POOL_H
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#define MEMORY_POOL_H
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#include <climits>
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#include <cstddef>
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template <typename T, size_t BlockSize = 4096>
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class MemoryPool
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{
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public:
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/* Member types */
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typedef T value_type;
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typedef T* pointer;
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typedef T& reference;
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typedef const T* const_pointer;
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typedef const T& const_reference;
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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typedef std::false_type propagate_on_container_copy_assignment;
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typedef std::true_type propagate_on_container_move_assignment;
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typedef std::true_type propagate_on_container_swap;
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template <typename U> struct rebind {
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typedef MemoryPool<U> other;
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};
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/* Member functions */
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MemoryPool() noexcept;
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MemoryPool(const MemoryPool& memoryPool) noexcept;
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MemoryPool(MemoryPool&& memoryPool) noexcept;
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template <class U> MemoryPool(const MemoryPool<U>& memoryPool) noexcept;
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~MemoryPool() noexcept;
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MemoryPool& operator=(const MemoryPool& memoryPool) = delete;
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MemoryPool& operator=(MemoryPool&& memoryPool) noexcept;
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pointer address(reference x) const noexcept;
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const_pointer address(const_reference x) const noexcept;
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// Can only allocate one object at a time. n and hint are ignored
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pointer allocate(size_type n = 1, const_pointer hint = 0);
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void deallocate(pointer p, size_type n = 1);
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size_type max_size() const noexcept;
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template <class U, class... Args> void construct(U* p, Args&&... args);
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template <class U> void destroy(U* p);
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template <class... Args> pointer newElement(Args&&... args);
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void deleteElement(pointer p);
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private:
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union Slot_ {
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value_type element;
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Slot_* next;
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};
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typedef char* data_pointer_;
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typedef Slot_ slot_type_;
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typedef Slot_* slot_pointer_;
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slot_pointer_ currentBlock_;
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slot_pointer_ currentSlot_;
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slot_pointer_ lastSlot_;
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slot_pointer_ freeSlots_;
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size_type padPointer(data_pointer_ p, size_type align) const noexcept;
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void allocateBlock();
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static_assert(BlockSize >= 2 * sizeof(slot_type_), "BlockSize too small.");
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};
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#include "MemoryPool.tcc"
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#endif // MEMORY_POOL_H
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