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/** @file
* IPRT / No-CRT - Minimal C++ std::memory.
*/
/*
* Copyright (C) 2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* 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, in version 3 of the
* License.
*
* 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, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef VBOX_INCLUDED_SRC_nocrt_memory
#define VBOX_INCLUDED_SRC_nocrt_memory
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/nocrt/cstddef>
#include <iprt/nocrt/new>
namespace std
{
/**
* Simple allocator - not C++11 compliant.
*/
template<class a_Type> class allocator
{
public:
typedef a_Type value_type;
typedef a_Type const &const_reference;
typedef a_Type *pointer;
typedef a_Type const *const_pointer;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
public:
allocator() RT_NOEXCEPT
{ }
allocator(allocator const &a_rThat) RT_NOEXCEPT
{ RT_NOREF(a_rThat); }
~allocator()
{ }
a_Type *allocate(size_type a_cItems, const void *a_pvHint = NULL)
{
RT_NOREF(a_pvHint);
Assert(a_cItems <= max_size()); /** @todo throw stuff */
return static_cast<pointer>(::operator new(sizeof(value_type) * a_cItems));
}
void deallocate(a_Type *a_paItems, size_type a_cItems)
{
if (a_paItems && a_cItems > 0)
::operator delete(a_paItems);
}
size_type max_size() const
{
/* whatever */
#if ARCH_BITS >= 64
return _4G / sizeof(value_type);
#else
return _512M / sizeof(value_type);
#endif
}
void construct(pointer a_pDst, const_reference a_rSrc)
{
::new (static_cast<void *>(a_pDst)) a_Type(a_rSrc);
}
void destroy(pointer a_pDst)
{
a_pDst->~value_type();
}
};
/** @todo make_unique and unique */
}
#endif /* !VBOX_INCLUDED_SRC_nocrt_memory */
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