diff options
Diffstat (limited to 'src/corelib/arch/symbian/slab_p.h')
-rw-r--r-- | src/corelib/arch/symbian/slab_p.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/corelib/arch/symbian/slab_p.h b/src/corelib/arch/symbian/slab_p.h new file mode 100644 index 0000000000..2451bbf151 --- /dev/null +++ b/src/corelib/arch/symbian/slab_p.h @@ -0,0 +1,125 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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__ |