/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Peter Schlaile <peter@schlaile.de> 2005
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file memutil/MEM_Allocator.h
 *  \ingroup memutil
 */


#ifndef __MEM_ALLOCATOR_H__
#define __MEM_ALLOCATOR_H__

#include <stddef.h>
#include "guardedalloc/MEM_guardedalloc.h"
#include "guardedalloc/MEM_sys_types.h"

template<typename _Tp>
struct MEM_Allocator
{
	typedef size_t    size_type;
	typedef ptrdiff_t difference_type;
	typedef _Tp*       pointer;
	typedef const _Tp* const_pointer;
	typedef _Tp&       reference;
	typedef const _Tp& const_reference;
	typedef _Tp        value_type;

	template<typename _Tp1>
        struct rebind { 
		typedef MEM_Allocator<_Tp1> other; 
	};

	MEM_Allocator() throw() {}
	MEM_Allocator(const MEM_Allocator&) throw() {}

	template<typename _Tp1>
        MEM_Allocator(const MEM_Allocator<_Tp1>) throw() { }

	~MEM_Allocator() throw() {}

	pointer address(reference __x) const { return &__x; }

	const_pointer address(const_reference __x) const { return &__x; }

	// NB: __n is permitted to be 0.  The C++ standard says nothing
	// about what the return value is when __n == 0.
	_Tp* allocate(size_type __n, const void* = 0) {
		_Tp* __ret = 0;
		if (__n)
			__ret = static_cast<_Tp*>(
				MEM_mallocN(__n * sizeof(_Tp),
					    "STL MEM_Allocator"));
		return __ret;
	}

	// __p is not permitted to be a null pointer.
	void deallocate(pointer __p, size_type){ 
		MEM_freeN(__p);
	}

	size_type max_size() const throw() { 
		return size_t(-1) / sizeof(_Tp); 
	}

	void construct(pointer __p, const _Tp& __val) { 
		new(__p) _Tp(__val); 
	}

	void destroy(pointer __p) { 
		__p->~_Tp(); 
	}
};

#endif // __MEM_ALLOCATOR_H__