99 lines
3.3 KiB
C++
99 lines
3.3 KiB
C++
/*-
|
|
* Copyright (c) 2013 Cosku Acay, http://www.coskuacay.com
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef MEMORY_POOL_H
|
|
#define MEMORY_POOL_H
|
|
|
|
#include <climits>
|
|
#include <cstddef>
|
|
|
|
template <typename T, size_t BlockSize = 4096>
|
|
class MemoryPool
|
|
{
|
|
public:
|
|
/* Member types */
|
|
typedef T value_type;
|
|
typedef T* pointer;
|
|
typedef T& reference;
|
|
typedef const T* const_pointer;
|
|
typedef const T& const_reference;
|
|
typedef size_t size_type;
|
|
typedef ptrdiff_t difference_type;
|
|
typedef std::false_type propagate_on_container_copy_assignment;
|
|
typedef std::true_type propagate_on_container_move_assignment;
|
|
typedef std::true_type propagate_on_container_swap;
|
|
|
|
template <typename U> struct rebind {
|
|
typedef MemoryPool<U> other;
|
|
};
|
|
|
|
/* Member functions */
|
|
MemoryPool() noexcept;
|
|
MemoryPool(const MemoryPool& memoryPool) noexcept;
|
|
MemoryPool(MemoryPool&& memoryPool) noexcept;
|
|
template <class U> MemoryPool(const MemoryPool<U>& memoryPool) noexcept;
|
|
|
|
~MemoryPool() noexcept;
|
|
|
|
MemoryPool& operator=(const MemoryPool& memoryPool) = delete;
|
|
MemoryPool& operator=(MemoryPool&& memoryPool) noexcept;
|
|
|
|
pointer address(reference x) const noexcept;
|
|
const_pointer address(const_reference x) const noexcept;
|
|
|
|
// Can only allocate one object at a time. n and hint are ignored
|
|
pointer allocate(size_type n = 1, const_pointer hint = 0);
|
|
void deallocate(pointer p, size_type n = 1);
|
|
|
|
size_type max_size() const noexcept;
|
|
|
|
template <class U, class... Args> void construct(U* p, Args&&... args);
|
|
template <class U> void destroy(U* p);
|
|
|
|
template <class... Args> pointer newElement(Args&&... args);
|
|
void deleteElement(pointer p);
|
|
|
|
private:
|
|
union Slot_ {
|
|
value_type element;
|
|
Slot_* next;
|
|
};
|
|
|
|
typedef char* data_pointer_;
|
|
typedef Slot_ slot_type_;
|
|
typedef Slot_* slot_pointer_;
|
|
|
|
slot_pointer_ currentBlock_;
|
|
slot_pointer_ currentSlot_;
|
|
slot_pointer_ lastSlot_;
|
|
slot_pointer_ freeSlots_;
|
|
|
|
size_type padPointer(data_pointer_ p, size_type align) const noexcept;
|
|
void allocateBlock();
|
|
|
|
static_assert(BlockSize >= 2 * sizeof(slot_type_), "BlockSize too small.");
|
|
};
|
|
|
|
#include "MemoryPool.tcc"
|
|
|
|
#endif // MEMORY_POOL_H
|