--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/include/heap_hybrid.h	Fri May 14 17:13:29 2010 +0300
@@ -0,0 +1,365 @@
+// 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\heap_hybrid.h
+// 
+// Uses malloc (aka dlmalloc) written by Doug Lea version 2.8.4
+//
+
+#ifndef __HEAP_HYBRID_H__
+#define __HEAP_HYBRID_H__
+
+#include <e32cmn.h>
+
+#ifdef __WINS__
+#define USE_HYBRID_HEAP 0
+#else
+#define USE_HYBRID_HEAP 1
+#endif
+
+// This stuff is all temporary in order to prevent having to include dla.h from heap_hybrid.h, which causes
+// problems due to its definition of size_t (and possibly other types).  This is unfortunate but we cannot
+// pollute the namespace with these types or it will cause problems with Open C and other POSIX compatibility
+// efforts in Symbian
+
+#define NSMALLBINS        (32U)
+#define NTREEBINS         (32U)
+
+#ifndef MALLOC_ALIGNMENT
+	#define MALLOC_ALIGNMENT ((TUint)8U)
+#endif  /* MALLOC_ALIGNMENT */
+
+#define CHUNK_OVERHEAD      (sizeof(TUint))
+
+typedef unsigned int bindex_t;
+typedef unsigned int binmap_t;
+typedef struct malloc_chunk* mchunkptr;
+typedef struct malloc_segment msegment;
+typedef struct malloc_state* mstate;
+typedef struct malloc_tree_chunk* tbinptr;
+typedef struct malloc_tree_chunk* tchunkptr;
+
+struct malloc_segment {
+  TUint8*        iBase;             /* base address */
+  TUint       iSize;             /* allocated size */
+};
+
+struct malloc_state {
+	binmap_t	 iSmallMap;
+	binmap_t	 iTreeMap;
+	TUint		 iDvSize;
+	TUint		 iTopSize;
+	mchunkptr	iDv;
+	mchunkptr	iTop;
+	TUint		 iTrimCheck;
+	mchunkptr	iSmallBins[(NSMALLBINS+1)*2];
+	tbinptr		iTreeBins[NTREEBINS];
+	msegment	iSeg;
+	};
+
+class RHybridHeap : public RHeap
+	{
+
+public:
+
+	struct HeapInfo
+		{
+	    unsigned iFootprint;
+	    unsigned iMaxSize;
+	    unsigned iAllocBytes;
+	    unsigned iAllocN;
+	    unsigned iFreeBytes;
+	    unsigned iFreeN;
+		};
+
+	struct SHeapCellInfo { RHybridHeap* iHeap; TInt iTotalAlloc;	TInt iTotalAllocSize; TInt iTotalFree; TInt iLevelAlloc; SDebugCell* iStranded; };
+
+
+	/**
+    @internalComponent
+    */
+	enum TAllocatorType
+			{ESlabAllocator, EDougLeaAllocator, EPageAllocator, EFullSlab=0x80, EPartialFullSlab=0x40, EEmptySlab=0x20, ESlabSpare=0x10, ESlabMask=0xf0};
+
+
+	/**
+    @internalComponent
+    */
+	struct SWalkInfo {
+					  /**
+	                  Walk function address shall be called
+	                  */
+		TWalkFunc iFunction;
+
+					  /**
+	                  The first parameter for callback function
+	                  */
+		TAny*        iParam;
+					  /**
+	                  Pointer to RHybridHeap object
+	                  */
+		RHybridHeap* iHeap;
+		};
+
+	/**
+    @internalComponent
+    */
+	struct SConfig {
+					  /**
+	                  Required slab configuration ( bit 0=4, bit 1=8 ..
+	                  bit 13 = 56)
+	                  */
+		TUint32 iSlabBits;
+					  /**
+	                  Delayed slab threshold in bytes (0 = no threshold)
+	                  */
+		TInt   iDelayedSlabThreshold;
+					  /**
+	                  2^n is smallest size allocated in paged allocator (14-31 = 16 Kb --> )
+	                  */
+		TInt   iPagePower;
+
+		};
+
+	/**
+	@internalComponent
+
+	This structure is used by test code for configuring the allocators and obtaining information
+	from them in order to ensure they are behaving as required.  This is internal test specific
+	code and is liable to be changed without warning at any time.  You should under no circumstances
+	be using it!
+	*/
+	struct STestCommand
+		{
+		TInt	iCommand;			// The test related command to be executed
+
+		union
+			{
+			SConfig		iConfig;	// Configuration used by test code only
+			TAny*		iData;		// Extra supporting data for the test command
+			};
+		};
+
+	/**
+	@internalComponent
+
+	Commands used by test code for configuring the allocators and obtaining information them them
+	*/
+	enum TTestCommand { EGetConfig, ESetConfig, EHeapMetaData, ETestData };
+
+	virtual TAny* Alloc(TInt aSize);
+	virtual void Free(TAny* aPtr);
+	virtual TAny* ReAlloc(TAny* aPtr, TInt aSize, TInt aMode=0);
+	virtual TInt AllocLen(const TAny* aCell) const;
+#ifndef __KERNEL_MODE__	
+	virtual TInt Compress();
+	virtual void Reset();
+	virtual TInt AllocSize(TInt& aTotalAllocSize) const;
+	virtual TInt Available(TInt& aBiggestBlock) const;
+#endif	
+	virtual TInt DebugFunction(TInt aFunc, TAny* a1=NULL, TAny* a2=NULL);
+protected:
+	virtual TInt Extension_(TUint aExtensionId, TAny*& a0, TAny* a1);
+
+public:
+	TAny* operator new(TUint aSize, TAny* aBase) __NO_THROW;
+	void operator delete(TAny*, TAny*);
+	
+private:
+	TInt DoCountAllocFree(TInt& aFree);
+	TInt DoCheckHeap(SCheckInfo* aInfo);
+	void DoMarkStart();
+	TUint32 DoMarkEnd(TInt aExpected);
+	void DoSetAllocFail(TAllocFail aType, TInt aRate);
+	TBool CheckForSimulatedAllocFail();
+	void DoSetAllocFail(TAllocFail aType, TInt aRate, TUint aBurst);
+	
+	void Lock() const;
+	void Unlock() const;
+	TInt ChunkHandle() const;
+
+	RHybridHeap(TInt aChunkHandle, TInt aOffset, TInt aMinLength, TInt aMaxLength, TInt aGrowBy, TInt aAlign, TBool aSingleThread, TBool aDlOnly, TBool aUseAdjust);	
+	RHybridHeap(TInt aMaxLength, TInt aAlign=0, TBool aSingleThread=ETrue);
+	RHybridHeap();
+	
+	void Init(TInt aBitmapSlab, TInt aPagePower);
+	inline void InitBins(mstate m);
+	inline void InitTop(mstate m, mchunkptr p, TUint psize);
+    void* SysAlloc(mstate m, TUint nb);
+	int SysTrim(mstate m, TUint pad);
+	void* TmallocLarge(mstate m, TUint nb);
+	void* TmallocSmall(mstate m, TUint nb);
+	/*MACROS converted functions*/
+	static inline void UnlinkFirstSmallChunk(mstate M,mchunkptr B,mchunkptr P,bindex_t& I);
+	static inline void InsertSmallChunk(mstate M,mchunkptr P, TUint S);
+	static inline void InsertChunk(mstate M,mchunkptr P,TUint S);
+	static inline void UnlinkLargeChunk(mstate M,tchunkptr X);
+	static inline void UnlinkSmallChunk(mstate M, mchunkptr P,TUint S);
+	static inline void UnlinkChunk(mstate M, mchunkptr P, TUint S);
+	static inline void ComputeTreeIndex(TUint S, bindex_t& I);
+	static inline void InsertLargeChunk(mstate M,tchunkptr X,TUint S);
+	static inline void ReplaceDv(mstate M, mchunkptr P, TUint S);
+	static inline void ComputeBit2idx(binmap_t X,bindex_t& I);
+
+	void DoComputeTreeIndex(TUint S, bindex_t& I);	
+	void DoCheckAnyChunk(mstate m, mchunkptr p);
+	void DoCheckTopChunk(mstate m, mchunkptr p);
+	void DoCheckInuseChunk(mstate m, mchunkptr p);
+	void DoCheckFreeChunk(mstate m, mchunkptr p);
+	void DoCheckMallocedChunk(mstate m, void* mem, TUint s);
+	void DoCheckTree(mstate m, tchunkptr t);
+	void DoCheckTreebin(mstate m, bindex_t i);
+	void DoCheckSmallbin(mstate m, bindex_t i);
+	TInt BinFind(mstate m, mchunkptr x);
+	TUint TraverseAndCheck(mstate m);
+	void DoCheckMallocState(mstate m);	
+	
+	TInt GetInfo(struct HeapInfo* i, SWalkInfo* wi=NULL) const;	
+	void InitDlMalloc(TUint capacity, int locked);
+	void* DlMalloc(TUint);
+	void  DlFree(void*);
+	void* DlRealloc(void*, TUint, TInt);
+	TUint DlInfo(struct HeapInfo* i, SWalkInfo* wi) const;
+	void DoCheckCommittedSize(TInt aNPages, mstate aM);	
+	
+	TAny* ReAllocImpl(TAny* aPtr, TInt aSize, TInt aMode);
+	void Construct(TBool aSingleThread, TBool aDLOnly, TBool aUseAdjust, TInt aAlign);
+#ifndef __KERNEL_MODE__	
+	TInt ConstructLock(TUint32 aMode);
+#endif	
+	static void Walk(SWalkInfo* aInfo, TAny* aBfr, TInt aLth, TCellType aBfrType, TAllocatorType aAlloctorType);
+	static void WalkCheckCell(TAny* aPtr, TCellType aType, TAny* aCell, TInt aLen);
+	void* Map(void* p, TInt sz);
+	void Unmap(void* p,TInt sz);
+
+private:
+	TInt iMinLength;
+	TInt iOffset;				// offset of RHeap object from chunk base
+	TInt iGrowBy;
+	TInt iMinCell;
+	TInt iPageSize;
+
+	// Temporarily commented out and exported from RHeap to prevent source breaks from req417-52840.
+	// This will be moved with another REQ after submission and subsequent fixing of bad code
+	//TInt iNestingLevel;
+	TInt iAllocCount;
+	// Temporarily commented out.  See comment above regarding req417-52840 source breaks
+	//TAllocFail iFailType;
+	TInt iFailRate;
+	TBool iFailed;
+	TInt iFailAllocCount;
+	TInt iRand;
+	// Temporarily commented out.  See comment above regarding req417-52840 source breaks
+	//TAny* iTestData;
+
+	TInt iChunkSize;				
+	TInt iHighWaterMark;
+	TBool iUseAdjust;
+	TBool iDLOnly;
+
+	malloc_state iGlobalMallocState;
+	
+#ifdef __KERNEL_MODE__
+	
+	friend class RHeapK;
+	
+#else
+	
+	friend class UserHeap;
+	friend class HybridHeap;
+	friend class TestHybridHeap;
+	
+private:
+
+	static void TreeRemove(slab* s);
+	static void TreeInsert(slab* s,slab** r);
+
+	enum {EOkBits = (1<<(MAXSLABSIZE>>2))-1};
+	
+	void SlabInit();
+	void SlabConfig(unsigned slabbitmap);
+	void* SlabAllocate(slabset& allocator);
+	void SlabFree(void* p);
+	void* AllocNewSlab(slabset& allocator);
+	void* AllocNewPage(slabset& allocator);
+	void* InitNewSlab(slabset& allocator, slab* s);
+	void FreeSlab(slab* s);
+	void FreePage(page* p);
+	void SlabInfo(struct HeapInfo* i, SWalkInfo* wi) const;
+	static void SlabFullInfo(slab* s, struct HeapInfo* i, SWalkInfo* wi);
+	static void SlabPartialInfo(slab* s, struct HeapInfo* i, SWalkInfo* wi);
+	static void SlabEmptyInfo(slab* s, struct HeapInfo* i, SWalkInfo* wi);
+	static void TreeWalk(slab* const* root, void (*f)(slab*, struct HeapInfo*, SWalkInfo*), struct HeapInfo* i, SWalkInfo* wi);
+
+	static void WalkPartialFullSlab(SWalkInfo* aInfo, slab* aSlab, TCellType aBfrType, TInt aLth);
+	static void WalkFullSlab(SWalkInfo* aInfo, slab* aSlab, TCellType aBfrType, TInt aLth);
+	void DoCheckSlab(slab* aSlab, TAllocatorType aSlabType, TAny* aBfr=NULL);
+	void DoCheckSlabTrees();	
+	void DoCheckSlabTree(slab** aS, TBool aPartialPage);
+	void BuildPartialSlabBitmap(TUint32* aBitmap, slab* aSlab, TAny* aBfr=NULL);
+	
+	static inline unsigned SlabHeaderFree(unsigned h) 
+	{return (h&0x000000ff);}
+	static inline unsigned SlabHeaderPagemap(unsigned h) 
+	{return (h&0x00000f00)>>8;}
+	static inline unsigned SlabHeaderSize(unsigned h) 
+	{return (h&0x0003f000)>>12;}
+	static inline unsigned SlabHeaderUsedm4(unsigned h) 
+	{return (h&0x0ffc0000)>>18;}
+	/***paged allocator code***/
+	void PagedInit(TInt aPagePower);
+	void* PagedAllocate(unsigned size);
+	void PagedFree(void* p);	
+	void* PagedReallocate(void* p, unsigned size, TInt mode);
+	
+	bool PagedEncode(unsigned pos, unsigned npage);
+	unsigned PagedDecode(unsigned pos) const;
+	inline unsigned PagedSize(void* p) const;
+	inline bool PagedSetSize(void* p, unsigned size);
+	inline void PagedZapSize(void* p, unsigned size);
+	inline void* Bitmap2addr(unsigned pos) const;
+	void PagedInfo(struct HeapInfo* i, SWalkInfo* wi) const;
+	void ResetBitmap();
+	TBool CheckBitmap(void* aBfr, TInt aSize, TUint32& aDummy, TInt& aNPages);	
+	
+private:
+	paged_bitmap iPageMap;							// bitmap representing page allocator's pages
+	TUint8*		iMemBase;							// bottom of paged/slab memory (chunk base)
+	TUint8		iBitMapBuffer[MAXSMALLPAGEBITS>>3];	// buffer for initial page bitmap
+	TInt		iSlabThreshold;						// allocations < than this are done by the slab allocator
+	TInt		iPageThreshold;						// 2^n is smallest cell size allocated in paged allocator
+	TInt		iSlabInitThreshold;					// slab allocator will be used after chunk reaches this size
+	TUint32		iSlabConfigBits;					// set of bits that specify which slab sizes to use
+	slab*		iPartialPage;						// partial-use page tree
+	slab*		iFullSlab;							// full slabs list (so we can find them when walking)
+	page*		iSparePage;							// cached, to avoid kernel exec calls for unmapping/remapping
+	TUint8		iSizeMap[(MAXSLABSIZE>>2)+1];		// index of slabset indexes based on size class
+	slabset		iSlabAlloc[MAXSLABSIZE>>2];			// array of pointers to slabsets
+
+#endif // __KERNEL_MODE__	
+};
+
+#define HEAP_ASSERT(x) __ASSERT_DEBUG(x, HEAP_PANIC(ETHeapBadCellAddress))
+
+template <class T> inline T Floor(const T addr, unsigned aln)
+{return T((unsigned(addr))&~(aln-1));}
+template <class T> inline T Ceiling(T addr, unsigned aln)
+{return T((unsigned(addr)+(aln-1))&~(aln-1));}
+template <class T> inline unsigned LowBits(T addr, unsigned aln)
+{return unsigned(addr)&(aln-1);}
+template <class T1, class T2> inline int PtrDiff(const T1* a1, const T2* a2)
+{return reinterpret_cast<const unsigned char*>(a1) - reinterpret_cast<const unsigned char*>(a2);}
+template <class T> inline T Offset(T addr, unsigned ofs)
+{return T(unsigned(addr)+ofs);}
+
+#endif //__HEAP_HYBRID_H__