107 lines
2.3 KiB
C++
107 lines
2.3 KiB
C++
/*!
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@file
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@author Albert Semenov
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@date 05/2009
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*/
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/*
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This file is part of MyGUI.
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MyGUI is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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MyGUI is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with MyGUI. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MYGUI_ALLOCATOR_H__
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#define __MYGUI_ALLOCATOR_H__
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#include <memory>
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#include <limits>
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namespace MyGUI
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{
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template<typename T>
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class Allocator
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{
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public:
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// typedefs
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typedef T value_type;
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typedef value_type* pointer;
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typedef const value_type* const_pointer;
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typedef value_type& reference;
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typedef const value_type& const_reference;
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typedef std::size_t size_type;
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typedef std::ptrdiff_t difference_type;
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public:
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// convert an allocator<T> to allocator<U>
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template<typename U>
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struct rebind
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{
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typedef Allocator<U> other;
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};
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public:
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inline explicit Allocator() { }
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inline ~Allocator() { }
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template<typename U>
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inline explicit Allocator(Allocator<U> const&) { }
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// address
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inline pointer address(reference r)
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{
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return &r;
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}
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inline const_pointer address(const_reference r)
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{
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return &r;
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}
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// memory allocation
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inline pointer allocate(size_type cnt, typename std::allocator<void>::const_pointer = 0)
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{
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return reinterpret_cast<pointer>(::operator new (cnt * sizeof (T)));
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}
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inline void deallocate(pointer p, size_type)
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{
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::operator delete (p);
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}
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// size
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inline size_type max_size() const
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{
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return (std::numeric_limits<size_type>::max)() / sizeof(T);
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}
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// construction/destruction
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inline void construct(pointer p, const T& t)
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{
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new (p) T(t);
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}
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inline void destroy(pointer p)
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{
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p->~T();
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}
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inline bool operator==(Allocator const&)
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{
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return true;
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}
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inline bool operator!=(Allocator const& a)
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{
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return !operator==(a);
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}
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};
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} // namespace MyGUI
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#endif // __MYGUI_ALLOCATOR_H__
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