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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* Effective License of whole file:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* Parts "Copyright by Sun Microsystems, Inc" prior to August 2011:
*
* The Contents of this file are made available subject to the terms of
* the GNU Lesser General Public License Version 2.1
*
* Copyright: 2002 by Sun Microsystems, Inc.
*
* All parts contributed on or after August 2011:
*
* Version: MPL 1.1 / GPLv3+ / LGPLv2.1+
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License or as specified alternatively below. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Major Contributor(s):
* [ Copyright (C) 2011 Lionel Elie Mamane <lionel@mamane.lu> ]
*
* All Rights Reserved.
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 3 or later (the "GPLv3+"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPLv2.1+"),
* in which case the provisions of the GPLv3+ or the LGPLv2.1+ are applicable
* instead of those above.
*
************************************************************************/
#ifndef _PQ_ALLOCATOR_
#define _PQ_ALLOCATOR_
#include <cstddef>
#include "sal/types.h"
/** jbu: This source has been copied from sal/inc/internal/allocator.hxx,
because it is not a public interface. Thx a lot for figuring this
out.
*/
//######################################################
// This is no general purpose STL allocator but one
// necessary to use STL for some implementation but
// avoid linking sal against the STLPort library!!!
// For more information on when and how to define a
// custom stl allocator have a look at Scott Meyers:
// "Effective STL", Nicolai M. Josuttis:
// "The C++ Standard Library - A Tutorial and Reference"
// and at http://www.josuttis.com/cppcode/allocator.html
namespace pq_sdbc_driver {
template<class T>
class Allocator
{
public:
typedef T value_type;
typedef T* pointer;
typedef const T* const_pointer;
typedef T& reference;
typedef const T& const_reference;
typedef ::std::size_t size_type;
typedef ::std::ptrdiff_t difference_type;
//-----------------------------------------
template<class U>
struct rebind
{
typedef Allocator<U> other;
};
//-----------------------------------------
pointer address (reference value) const
{
return &value;
}
//-----------------------------------------
const_pointer address (const_reference value) const
{
return &value;
}
//-----------------------------------------
Allocator() SAL_THROW(())
{}
//-----------------------------------------
template<class U>
Allocator (const Allocator<U>&) SAL_THROW(())
{}
//-----------------------------------------
Allocator(const Allocator&) SAL_THROW(())
{}
//-----------------------------------------
~Allocator() SAL_THROW(())
{}
//-----------------------------------------
size_type max_size() const SAL_THROW(())
{
return size_type(-1)/sizeof(T);
}
//-----------------------------------------
/* Normally the code for allocate should
throw a std::bad_alloc exception if the
requested memory could not be allocated:
(C++ standard 20.4.1.1):
pointer allocate (size_type n, const void* hint = 0)
{
pointer p = reinterpret_cast<pointer>(
rtl_allocateMemory(sal_uInt32(n * sizeof(T))));
if (NULL == p)
throw ::std::bad_alloc();
return p;
}
but some compilers do not compile it if exceptions
are not enabled, e.g. GCC under Linux and it is
in general not desired to compile sal with exceptions
enabled. */
pointer allocate (size_type n, SAL_UNUSED_PARAMETER const void* = 0)
{
return reinterpret_cast<pointer>(
rtl_allocateMemory(sal_uInt32(n * sizeof(T))));
}
//-----------------------------------------
void deallocate (pointer p, SAL_UNUSED_PARAMETER size_type)
{
rtl_freeMemory(p);
}
//-----------------------------------------
void construct (pointer p, const T& value)
{
new ((void*)p)T(value);
}
// LEM: GNU libstdc++ vectors expect this one to exist,
// at least if one intends to create vectors by giving
// only a size and no initialising value.
//-----------------------------------------
void construct (pointer p)
{
new ((void*)p)T;
}
//-----------------------------------------
void destroy (pointer p)
{
p->~T();
#ifdef _MSC_VER
(void) p; // spurious warning C4100: 'p': unreferenced formal parameter
#endif
}
};
//######################################################
// Custom STL allocators must be stateless (see
// references above) that's why the operators below
// return always true or false
template<class T, class U>
inline bool operator== (const Allocator<T>&, const Allocator<U>&) SAL_THROW(())
{
return true;
}
template<class T, class U>
inline bool operator!= (const Allocator<T>&, const Allocator<U>&) SAL_THROW(())
{
return false;
}
} /* namespace sal */
#endif /* _PQ_ALLOCATOR_ */
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