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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef __KERNEL_MODE__
class slab;
class slabhdr;
#define MAXSLABSIZE 56
#define PAGESHIFT 12
#define PAGESIZE (1<<PAGESHIFT)
#define SLABSHIFT 10
#define SLABSIZE (1 << SLABSHIFT)
#define CELLALIGN 8
const unsigned slabfull = 0;
const TInt slabsperpage = (int)(PAGESIZE/SLABSIZE);
#define HIBIT(bits) (((unsigned)bits & 0xc) ? 2 + ((unsigned)bits>>3) : ((unsigned) bits>>1))
#define LOWBIT(bits) (((unsigned) bits&3) ? 1 - ((unsigned)bits&1) : 3 - (((unsigned)bits>>2)&1))
#define ZEROBITS(header) (((unsigned)header & 0x70000000) ? 0 : 1)
class slabhdr
{
public:
unsigned iHeader;
// made up of
// bits | 31 | 30..28 | 27..18 | 17..12 | 11..8 | 7..0 |
// +----------+--------+--------+--------+---------+----------+
// field | floating | zero | used-4 | size | pagemap | free pos |
//
slab** iParent; // reference to iParent's pointer to this slab in tree
slab* iChild1; // 1st iChild in tree
slab* iChild2; // 2nd iChild in tree
};
const TInt KMaxSlabPayload = SLABSIZE - sizeof(slabhdr);
#define MAXUSEDM4BITS 0x0fc00000
#define FLOATING_BIT 0x80000000
inline unsigned HeaderFloating(unsigned h)
{return (h&0x80000000);}
const unsigned maxuse = (SLABSIZE - sizeof(slabhdr))>>2;
const unsigned firstpos = sizeof(slabhdr)>>2;
#ifdef _DEBUG
#define CHECKTREE(x) DoCheckSlabTree(x,EFalse)
#define CHECKSLAB(s,t,p) DoCheckSlab(s,t,p)
#define CHECKSLABBFR(s,p) {TUint32 b[4]; BuildPartialSlabBitmap(b,s,p);}
#else
#define CHECKTREE(x) (void)0
#define CHECKSLAB(s,t,p) (void)0
#define CHECKSLABBFR(s,p) (void)0
#endif
class slabset
{
public:
slab* iPartial;
};
class slab : public slabhdr
{
public:
void Init(unsigned clz);
//static slab* SlabFor( void* p);
static slab* SlabFor(const void* p) ;
unsigned char iPayload[SLABSIZE-sizeof(slabhdr)];
};
class page
{
public:
inline static page* PageFor(slab* s);
//slab iSlabs;
slab iSlabs[slabsperpage];
};
inline page* page::PageFor(slab* s)
{
return reinterpret_cast<page*>((unsigned(s))&~(PAGESIZE-1));
}
#endif // __KERNEL_MODE__
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