diff -r a232af6b0b1f -r a5496987b1da kernel/eka/include/slab.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/include/slab.h	Thu Jul 01 17:57:33 2010 +0100
@@ -0,0 +1,101 @@
+// Copyright (c) 1994-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// kernel\eka\include\slab.h
+// 
+//
+
+#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__