kerneltest/e32test/system/t_atomic.h
changeset 9 96e5fb8b040d
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-1:000000000000 9:96e5fb8b040d
       
     1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
       
     2 // All rights reserved.
       
     3 // This component and the accompanying materials are made available
       
     4 // under the terms of the License "Eclipse Public License v1.0"
       
     5 // which accompanies this distribution, and is available
       
     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     7 //
       
     8 // Initial Contributors:
       
     9 // Nokia Corporation - initial contribution.
       
    10 //
       
    11 // Contributors:
       
    12 //
       
    13 // Description:
       
    14 // e32test\system\t_atomic.h
       
    15 // 
       
    16 //
       
    17 
       
    18 #include <e32atomics.h>
       
    19 
       
    20 #ifdef __VC32__
       
    21 #pragma warning( disable : 4244 )	/* conversion to shorter type - possible loss of data */
       
    22 #endif
       
    23 
       
    24 const TInt KMaxThreads = 8;
       
    25 
       
    26 #ifdef __KERNEL_MODE__
       
    27 #include <kernel/kernel.h>
       
    28 #undef	DEBUGPRINT
       
    29 #define	DEBUGPRINT	Kern::Printf
       
    30 #else
       
    31 extern void UPrintf(const char*, ...);
       
    32 #undef	DEBUGPRINT
       
    33 #define DEBUGPRINT	UPrintf
       
    34 #endif
       
    35 
       
    36 #undef	__INT64_ALIGNED__
       
    37 #if (defined(__GNUC__) && (__GNUC__ >= 3)) || defined(__EABI__)
       
    38 #define	__INT64_ALIGNED__
       
    39 #endif
       
    40 
       
    41 #ifdef __INT64_ALIGNED__
       
    42 typedef	TUint64	TUint64A;
       
    43 typedef	TInt64	TInt64A;
       
    44 #else
       
    45 
       
    46 class TUint64A
       
    47 	{
       
    48 public:
       
    49 	inline const TUint64* operator&() const
       
    50 		{ return ((const TUint64*)((T_UintPtr(this)+7)&~7)); }
       
    51 	inline TUint64* operator&()
       
    52 		{ return ((TUint64*)((T_UintPtr(this)+7)&~7)); }
       
    53 private:
       
    54 	TUint64 i_Data[2];
       
    55 	};
       
    56 
       
    57 class TInt64A
       
    58 	{
       
    59 public:
       
    60 	inline const TInt64* operator&() const
       
    61 		{ return ((const TInt64*)((T_UintPtr(this)+7)&~7)); }
       
    62 	inline TInt64* operator&()
       
    63 		{ return ((TInt64*)((T_UintPtr(this)+7)&~7)); }
       
    64 private:
       
    65 	TUint64 i_Data[2];
       
    66 	};
       
    67 
       
    68 #endif
       
    69 
       
    70 struct TDGBase
       
    71 	{
       
    72 	TInt Execute();
       
    73 	void Dump(const char*);
       
    74 
       
    75 	TUint64	i0;
       
    76 	TUint64	i1;
       
    77 	TUint64	i2;
       
    78 	TUint64	i3;
       
    79 	TInt	iIndex;
       
    80 	};
       
    81 
       
    82 struct TAtomicAction
       
    83 	{
       
    84 	TUint64	i0;			// first parameter to operation
       
    85 	TUint64	i1;			// second parameter to operation
       
    86 	TUint64	i2;			// third parameter to operation
       
    87 	TInt	iIndex;		// index of atomic function
       
    88 	TInt	iThread;	// thread identifier
       
    89 	};
       
    90 
       
    91 struct TPerThread
       
    92 	{
       
    93 	TUint64	iDiff;		// accumulated difference
       
    94 	TUint64	iXor;		// accumulated XOR
       
    95 	TUint64 iFailCount;	// failure count for CAS operations
       
    96 	TUint64 iCount;		// iteration count
       
    97 	};
       
    98 
       
    99 extern "C" TInt DoAtomicAction(TAny* aPtr, TPerThread* aT, TAtomicAction& aA);
       
   100 
       
   101 enum TMemoryOrder
       
   102 	{
       
   103 	EOrderRelaxed=0,
       
   104 	EOrderAcquire=1,
       
   105 	EOrderRelease=2,
       
   106 	EOrderOrdered=3,
       
   107 	};
       
   108 
       
   109 enum TAtomicFunc
       
   110 	{
       
   111 	EAtomicFuncLOAD=0,
       
   112 	EAtomicFuncSTORE=1,
       
   113 	EAtomicFuncSWP=2,
       
   114 	EAtomicFuncADD=3,
       
   115 	EAtomicFuncAND=4,
       
   116 	EAtomicFuncIOR=5,
       
   117 	EAtomicFuncXOR=6,
       
   118 	EAtomicFuncAXO=7,
       
   119 	EAtomicFuncTAU=8,
       
   120 	EAtomicFuncTAS=9,
       
   121 	EAtomicFuncCAS=10,
       
   122 	EAtomicFuncN
       
   123 	};
       
   124 
       
   125 enum TFuncType
       
   126 	{
       
   127 	EFuncTypeInvalid=0,
       
   128 	EFuncTypeLoad=1,
       
   129 	EFuncTypeRmw1=2,
       
   130 	EFuncTypeRmw2=3,
       
   131 	EFuncTypeRmw3=4,
       
   132 	EFuncTypeCas=5,
       
   133 	};
       
   134 
       
   135 #define	FUNCS_PER_SIZE			(TUint(EAtomicFuncN)*4)
       
   136 #define TOTAL_FUNCS				(FUNCS_PER_SIZE*4)
       
   137 #define	INDEXES_PER_SIZE		(16*4)
       
   138 #define	TOTAL_INDEXES			(INDEXES_PER_SIZE*4)
       
   139 
       
   140 #define FUNCATTR(func,size,ord,type)	((TUint(func)<<24)|(TUint(size)<<16)|(TUint(ord)<<8)|(TUint(type)))
       
   141 #define	ATTR_TO_TYPE(attr)				((attr)&0xff)
       
   142 #define	ATTR_TO_ORD(attr)				(((attr)>>8)&0xff)
       
   143 #define	ATTR_TO_SIZE(attr)				(((attr)>>16)&0xff)
       
   144 #define	ATTR_TO_FUNC(attr)				(((attr)>>24)&0xff)
       
   145 #define	FUNCATTR2(func,size,type)	\
       
   146 			FUNCATTR(func,size,EOrderRelaxed,type),	FUNCATTR(func,size,EOrderAcquire,type), FUNCATTR(func,size,EOrderRelease,type), FUNCATTR(func,size,EOrderOrdered,type)
       
   147 #define	FUNCATTR2A(func,size,type)	\
       
   148 												0,	FUNCATTR(func,size,EOrderAcquire,type),										0,										0
       
   149 #define	FUNCATTR2B(func,size,type)	\
       
   150 												0,										0,	FUNCATTR(func,size,EOrderRelease,type),	FUNCATTR(func,size,EOrderOrdered,type)
       
   151 #define	FUNCATTR3(size)				\
       
   152 			FUNCATTR2A(EAtomicFuncLOAD,size,EFuncTypeLoad),		\
       
   153 			FUNCATTR2B(EAtomicFuncSTORE,size,EFuncTypeRmw1),	\
       
   154 			FUNCATTR2(EAtomicFuncSWP,size,EFuncTypeRmw1),		\
       
   155 			FUNCATTR2(EAtomicFuncADD,size,EFuncTypeRmw1),		\
       
   156 			FUNCATTR2(EAtomicFuncAND,size,EFuncTypeRmw1),		\
       
   157 			FUNCATTR2(EAtomicFuncIOR,size,EFuncTypeRmw1),		\
       
   158 			FUNCATTR2(EAtomicFuncXOR,size,EFuncTypeRmw1),		\
       
   159 			FUNCATTR2(EAtomicFuncAXO,size,EFuncTypeRmw2),		\
       
   160 			FUNCATTR2(EAtomicFuncTAU,size,EFuncTypeRmw3),		\
       
   161 			FUNCATTR2(EAtomicFuncTAS,size,EFuncTypeRmw3),		\
       
   162 			FUNCATTR2(EAtomicFuncCAS,size,EFuncTypeCas),		\
       
   163 			0,	0,	0,	0,										\
       
   164 			0,	0,	0,	0,										\
       
   165 			0,	0,	0,	0,										\
       
   166 			0,	0,	0,	0,										\
       
   167 			0,	0,	0,	0
       
   168 
       
   169 
       
   170 #define	__DO_STRINGIFY__(x)			#x
       
   171 #define	__STRINGIFY__(x)			__DO_STRINGIFY__(x)
       
   172 #define __concat3__(a,b,c)			a##b##c
       
   173 #define __concat5__(a,b,c,d,e)		a##b##c##d##e
       
   174 #define FUNCNAME(func,size,ord)		__STRINGIFY__(__concat3__(func,size,ord))
       
   175 #define ATOMICFUNC(func,size,ord)	__concat5__(__e32_atomic_,func,_,ord,size)
       
   176 #define CONTROLFUNC(func,size,ord)	__concat3__(__nonatomic_,func,size)
       
   177 #define	FUNCNAME2(func,size)		FUNCNAME(func,size,rlx), FUNCNAME(func,size,acq), FUNCNAME(func,size,rel), FUNCNAME(func,size,ord)
       
   178 #define	FUNCNAME3(size)	\
       
   179 			FUNCNAME2(load,size),	\
       
   180 			FUNCNAME2(store,size),	\
       
   181 			FUNCNAME2(swp,size),	\
       
   182 			FUNCNAME2(add,size),	\
       
   183 			FUNCNAME2(and,size),	\
       
   184 			FUNCNAME2(ior,size),	\
       
   185 			FUNCNAME2(xor,size),	\
       
   186 			FUNCNAME2(axo,size),	\
       
   187 			FUNCNAME2(tau,size),	\
       
   188 			FUNCNAME2(tas,size),	\
       
   189 			FUNCNAME2(cas,size),	\
       
   190 			"", "", "", "",			\
       
   191 			"", "", "", "",			\
       
   192 			"", "", "", "",			\
       
   193 			"", "", "", "",			\
       
   194 			"", "", "", ""
       
   195 
       
   196 
       
   197 #define	ATOMICFUNC2(func,size)		(PFV)&ATOMICFUNC(func,size,rlx), (PFV)&ATOMICFUNC(func,size,acq), (PFV)&ATOMICFUNC(func,size,rel), (PFV)&ATOMICFUNC(func,size,ord)
       
   198 #define	ATOMICFUNC2A(func,size)									0,	(PFV)&ATOMICFUNC(func,size,acq),								0,							0
       
   199 #define	ATOMICFUNC2B(func,size)									0,								0,	(PFV)&ATOMICFUNC(func,size,rel), (PFV)&ATOMICFUNC(func,size,ord)
       
   200 #define	ATOMICFUNC3(size)				\
       
   201 			ATOMICFUNC2A(load,size),	\
       
   202 			ATOMICFUNC2B(store,size),	\
       
   203 			ATOMICFUNC2(swp,size),		\
       
   204 			ATOMICFUNC2(add,size),		\
       
   205 			ATOMICFUNC2(and,size),		\
       
   206 			ATOMICFUNC2(ior,size),		\
       
   207 			ATOMICFUNC2(xor,size),		\
       
   208 			ATOMICFUNC2(axo,size),		\
       
   209 			ATOMICFUNC2(tau,size),		\
       
   210 			ATOMICFUNC2(tas,size),		\
       
   211 			ATOMICFUNC2(cas,size),		\
       
   212 			0, 0, 0, 0,					\
       
   213 			0, 0, 0, 0,					\
       
   214 			0, 0, 0, 0,					\
       
   215 			0, 0, 0, 0,					\
       
   216 			0, 0, 0, 0
       
   217 
       
   218 
       
   219 #define	CONTROLFUNC2(func,size)		(PFV)&CONTROLFUNC(func,size,rlx), (PFV)&CONTROLFUNC(func,size,acq), (PFV)&CONTROLFUNC(func,size,rel), (PFV)&CONTROLFUNC(func,size,ord)
       
   220 #define	CONTROLFUNC2A(func,size)								0,	(PFV)&CONTROLFUNC(func,size,acq),								0,							0
       
   221 #define	CONTROLFUNC2B(func,size)								0,								0,	(PFV)&CONTROLFUNC(func,size,rel), (PFV)&CONTROLFUNC(func,size,ord)
       
   222 #define	CONTROLFUNC3(size)				\
       
   223 			CONTROLFUNC2A(load,size),	\
       
   224 			CONTROLFUNC2B(store,size),	\
       
   225 			CONTROLFUNC2(swp,size),		\
       
   226 			CONTROLFUNC2(add,size),		\
       
   227 			CONTROLFUNC2(and,size),		\
       
   228 			CONTROLFUNC2(ior,size),		\
       
   229 			CONTROLFUNC2(xor,size),		\
       
   230 			CONTROLFUNC2(axo,size),		\
       
   231 			CONTROLFUNC2(tau,size),		\
       
   232 			CONTROLFUNC2(tas,size),		\
       
   233 			CONTROLFUNC2(cas,size),		\
       
   234 			0, 0, 0, 0,					\
       
   235 			0, 0, 0, 0,					\
       
   236 			0, 0, 0, 0,					\
       
   237 			0, 0, 0, 0,					\
       
   238 			0, 0, 0, 0
       
   239 
       
   240 
       
   241 #ifdef __INCLUDE_FUNC_NAMES__
       
   242 extern "C" const char* FuncName[] =
       
   243 	{
       
   244 	FUNCNAME3(8),
       
   245 	FUNCNAME3(16),
       
   246 	FUNCNAME3(32),
       
   247 	FUNCNAME3(64)
       
   248 	};
       
   249 #endif
       
   250 
       
   251 typedef void (*PFV)();
       
   252 
       
   253 #ifdef __INCLUDE_ATOMIC_FUNCTIONS__
       
   254 extern "C" const PFV AtomicFuncPtr[] =
       
   255 	{
       
   256 	ATOMICFUNC3(8),
       
   257 	ATOMICFUNC3(16),
       
   258 	ATOMICFUNC3(32),
       
   259 	ATOMICFUNC3(64)
       
   260 	};
       
   261 #endif
       
   262 
       
   263 #ifdef __INCLUDE_CONTROL_FUNCTIONS__
       
   264 extern "C" {
       
   265 
       
   266 // Simulated versions of atomic functions without the atomicity
       
   267 extern TUint8	__nonatomic_load8(const volatile TAny* a);
       
   268 extern TUint8	__nonatomic_store8(volatile TAny* a, TUint8 v);
       
   269 extern TUint8	__nonatomic_swp8(volatile TAny* a, TUint8 v);
       
   270 extern TBool	__nonatomic_cas8(volatile TAny* a, TUint8* q, TUint8 v);
       
   271 extern TUint8	__nonatomic_add8(volatile TAny* a, TUint8 v);
       
   272 extern TUint8	__nonatomic_and8(volatile TAny* a, TUint8 v);
       
   273 extern TUint8	__nonatomic_ior8(volatile TAny* a, TUint8 v);
       
   274 extern TUint8	__nonatomic_xor8(volatile TAny* a, TUint8 v);
       
   275 extern TUint8	__nonatomic_axo8(volatile TAny* a, TUint8 u, TUint8 v);
       
   276 extern TUint8	__nonatomic_tau8(volatile TAny* a, TUint8 t, TUint8 u, TUint8 v);
       
   277 extern TInt8	__nonatomic_tas8(volatile TAny* a, TInt8 t, TInt8 u, TInt8 v);
       
   278 
       
   279 extern TUint16	__nonatomic_load16(const volatile TAny* a);
       
   280 extern TUint16	__nonatomic_store16(volatile TAny* a, TUint16 v);
       
   281 extern TUint16	__nonatomic_swp16(volatile TAny* a, TUint16 v);
       
   282 extern TBool	__nonatomic_cas16(volatile TAny* a, TUint16* q, TUint16 v);
       
   283 extern TUint16	__nonatomic_add16(volatile TAny* a, TUint16 v);
       
   284 extern TUint16	__nonatomic_and16(volatile TAny* a, TUint16 v);
       
   285 extern TUint16	__nonatomic_ior16(volatile TAny* a, TUint16 v);
       
   286 extern TUint16	__nonatomic_xor16(volatile TAny* a, TUint16 v);
       
   287 extern TUint16	__nonatomic_axo16(volatile TAny* a, TUint16 u, TUint16 v);
       
   288 extern TUint16	__nonatomic_tau16(volatile TAny* a, TUint16 t, TUint16 u, TUint16 v);
       
   289 extern TInt16	__nonatomic_tas16(volatile TAny* a, TInt16 t, TInt16 u, TInt16 v);
       
   290 
       
   291 extern TUint32	__nonatomic_load32(const volatile TAny* a);
       
   292 extern TUint32	__nonatomic_store32(volatile TAny* a, TUint32 v);
       
   293 extern TUint32	__nonatomic_swp32(volatile TAny* a, TUint32 v);
       
   294 extern TBool	__nonatomic_cas32(volatile TAny* a, TUint32* q, TUint32 v);
       
   295 extern TUint32	__nonatomic_add32(volatile TAny* a, TUint32 v);
       
   296 extern TUint32	__nonatomic_and32(volatile TAny* a, TUint32 v);
       
   297 extern TUint32	__nonatomic_ior32(volatile TAny* a, TUint32 v);
       
   298 extern TUint32	__nonatomic_xor32(volatile TAny* a, TUint32 v);
       
   299 extern TUint32	__nonatomic_axo32(volatile TAny* a, TUint32 u, TUint32 v);
       
   300 extern TUint32	__nonatomic_tau32(volatile TAny* a, TUint32 t, TUint32 u, TUint32 v);
       
   301 extern TInt32	__nonatomic_tas32(volatile TAny* a, TInt32 t, TInt32 u, TInt32 v);
       
   302 
       
   303 extern TUint64	__nonatomic_load64(const volatile TAny* a);
       
   304 extern TUint64	__nonatomic_store64(volatile TAny* a, TUint64 v);
       
   305 extern TUint64	__nonatomic_swp64(volatile TAny* a, TUint64 v);
       
   306 extern TBool	__nonatomic_cas64(volatile TAny* a, TUint64* q, TUint64 v);
       
   307 extern TUint64	__nonatomic_add64(volatile TAny* a, TUint64 v);
       
   308 extern TUint64	__nonatomic_and64(volatile TAny* a, TUint64 v);
       
   309 extern TUint64	__nonatomic_ior64(volatile TAny* a, TUint64 v);
       
   310 extern TUint64	__nonatomic_xor64(volatile TAny* a, TUint64 v);
       
   311 extern TUint64	__nonatomic_axo64(volatile TAny* a, TUint64 u, TUint64 v);
       
   312 extern TUint64	__nonatomic_tau64(volatile TAny* a, TUint64 t, TUint64 u, TUint64 v);
       
   313 extern TInt64	__nonatomic_tas64(volatile TAny* a, TInt64 t, TInt64 u, TInt64 v);
       
   314 
       
   315 } // extern "C"
       
   316 
       
   317 
       
   318 extern "C" const PFV ControlFuncPtr[] =
       
   319 	{
       
   320 	CONTROLFUNC3(8),
       
   321 	CONTROLFUNC3(16),
       
   322 	CONTROLFUNC3(32),
       
   323 	CONTROLFUNC3(64)
       
   324 	};
       
   325 #endif
       
   326 
       
   327 #ifdef __INCLUDE_FUNCTION_ATTRIBUTES__
       
   328 extern "C" const TUint FuncAttr[] =
       
   329 	{
       
   330 	FUNCATTR3(1),
       
   331 	FUNCATTR3(2),
       
   332 	FUNCATTR3(4),
       
   333 	FUNCATTR3(8)
       
   334 	};
       
   335 #endif
       
   336 
       
   337 template<class T>
       
   338 struct TLoadFn	//	load
       
   339 	{
       
   340 	typedef T (*F)(const volatile TAny*);
       
   341 	};
       
   342 
       
   343 template<class T>
       
   344 struct TRmw1Fn	// store, swp, add, and, ior, xor
       
   345 	{
       
   346 	typedef T (*F)(volatile TAny*, T);
       
   347 	};
       
   348 
       
   349 template<class T>
       
   350 struct TRmw2Fn	// axo
       
   351 	{
       
   352 	typedef T (*F)(volatile TAny*, T, T);
       
   353 	};
       
   354 
       
   355 template<class T>
       
   356 struct TRmw3Fn	// tau, tas
       
   357 	{
       
   358 	typedef T (*F)(volatile TAny*, T, T, T);
       
   359 	};
       
   360 
       
   361 template<class T>
       
   362 struct TCasFn	// cas
       
   363 	{
       
   364 	typedef TBool (*F)(volatile TAny*, T*, T);
       
   365 	};
       
   366 
       
   367 class TEnclosed
       
   368 	{
       
   369 public:
       
   370 	TEnclosed(TInt aSize);
       
   371 	TAny* Ptr();
       
   372 	TInt Next();
       
   373 	void Init();
       
   374 	TInt Verify();
       
   375 	TInt Offset() const {return iOffset;}
       
   376 private:
       
   377 	TUint64* iData;
       
   378 	TUint64* iBackup;
       
   379 	TUint64	i_Data[17];
       
   380 	TInt iOffset;
       
   381 	TInt iSize;
       
   382 	};
       
   383 
       
   384 template<class T>
       
   385 class Transform
       
   386 	{
       
   387 public:
       
   388 	inline static T A();
       
   389 	inline static T B();
       
   390 	static T F(T aOrig);						// return Ax+B mod M (M=2^n, n=number of bits in T)
       
   391 	static T Pow(T aBase, TUint64 aExp);		// return aBase^aExp mod M
       
   392 	static T PowerSum(T aBase, TUint64 aExp);	// return 1 + T + T^2 + ... + T^(aExp-1) mod M
       
   393 	static T F_iter(T aOrig, TUint64 aCount);	// return result of applying F iterated aCount times to aOrig
       
   394 	};
       
   395 
       
   396 TEMPLATE_SPECIALIZATION inline TUint8 Transform<TUint8>::A()
       
   397 	{ return 19; }
       
   398 TEMPLATE_SPECIALIZATION inline TUint8 Transform<TUint8>::B()
       
   399 	{ return 29; }
       
   400 
       
   401 TEMPLATE_SPECIALIZATION inline TUint16 Transform<TUint16>::A()
       
   402 	{ return 487; }
       
   403 TEMPLATE_SPECIALIZATION inline TUint16 Transform<TUint16>::B()
       
   404 	{ return 12983; }
       
   405 
       
   406 TEMPLATE_SPECIALIZATION inline TUint32 Transform<TUint32>::A()
       
   407 	{ return 29943829; }
       
   408 TEMPLATE_SPECIALIZATION inline TUint32 Transform<TUint32>::B()
       
   409 	{ return 104729; }
       
   410 
       
   411 TEMPLATE_SPECIALIZATION inline TUint64 Transform<TUint64>::A()
       
   412 	{ return UI64LIT(2862933555777941757); }
       
   413 TEMPLATE_SPECIALIZATION inline TUint64 Transform<TUint64>::B()
       
   414 	{ return UI64LIT(104917093); }
       
   415 
       
   416 template<class T>
       
   417 T Transform<T>::F(T aOrig)
       
   418 	{
       
   419 	return (T)(aOrig * Transform<T>::A() + Transform<T>::B());
       
   420 	}
       
   421 
       
   422 template<class T>
       
   423 T Transform<T>::Pow(T aBase, TUint64 aExp)
       
   424 	{
       
   425 	T result(1);
       
   426 	T multiplier(aBase);
       
   427 	while (aExp)
       
   428 		{
       
   429 		if (aExp&1)
       
   430 			result *= multiplier;
       
   431 		aExp >>= 1;
       
   432 		if (aExp)
       
   433 			multiplier *= multiplier;
       
   434 		}
       
   435 	return (T)result;
       
   436 	}
       
   437 
       
   438 template<class T>
       
   439 T Transform<T>::PowerSum(T aBase, TUint64 aExp)
       
   440 	{
       
   441 	T result(0);
       
   442 	T multiplier(aBase);
       
   443 	T inter(1);
       
   444 	while (aExp)
       
   445 		{
       
   446 		if (aExp&1)
       
   447 			{
       
   448 			result *= multiplier;
       
   449 			result += inter;
       
   450 			}
       
   451 		aExp >>= 1;
       
   452 		if (aExp)
       
   453 			{
       
   454 			inter *= (multiplier + 1);
       
   455 			multiplier *= multiplier;
       
   456 			}
       
   457 		}
       
   458 	return (T)result;
       
   459 	}
       
   460 
       
   461 template<class T>
       
   462 T Transform<T>::F_iter(T aOrig, TUint64 aCount)
       
   463 	{
       
   464 	return (T)(Pow(A(),aCount)*aOrig + PowerSum(A(),aCount)*B());
       
   465 	}
       
   466 
       
   467 
       
   468 
       
   469 #ifdef __EPOC32__
       
   470 _LIT(KAtomicTestLddName,"D_ATOMIC");
       
   471 
       
   472 class RTestAtomic : public RBusLogicalChannel
       
   473 	{
       
   474 public:
       
   475 	enum TControl
       
   476 		{
       
   477 		ETDGExecuteK=0,
       
   478 		EInitialise=1,
       
   479 		ERetrieve=2,
       
   480 		ESetCurrentThreadTimeslice=3,
       
   481 		ESwitchExecTables=4,
       
   482 		EGetKernelMemoryAddress=5,
       
   483 		EMaxControl
       
   484 		};
       
   485 
       
   486 #ifndef __KERNEL_MODE__
       
   487 public:
       
   488 	inline TInt Open()
       
   489 		{ return DoCreate(KAtomicTestLddName,TVersion(),KNullUnit,NULL,NULL); }
       
   490 public:
       
   491 	inline TInt TDGExecuteK(TDGBase& a)
       
   492 		{ return DoControl(ETDGExecuteK, &a); }
       
   493 	inline TInt Initialise(TUint64 aValue)
       
   494 		{ return DoControl(EInitialise, &aValue); }
       
   495 	inline TUint64 Retrieve()
       
   496 		{ TUint64 x; DoControl(ERetrieve, &x); return x; }
       
   497 	inline TInt SetCurrentThreadTimeslice(TInt aTimeslice)
       
   498 		{ return DoControl(ESetCurrentThreadTimeslice, (TAny*)aTimeslice); }
       
   499 	inline TInt SwitchExecTables(TInt aThread)
       
   500 		{ return DoControl(ESwitchExecTables, (TAny*)aThread); }
       
   501 	inline TAny* KernelMemoryAddress()
       
   502 		{ return (TAny*)DoControl(EGetKernelMemoryAddress); }
       
   503 
       
   504 	static TInt GetThreadInfo(TPerThread& aInfo);
       
   505 	static TInt SetThreadInfo(const TPerThread& aInfo);
       
   506 	static TInt AtomicAction(TAtomicAction& aAction);
       
   507 	static TInt RestoreExecTable();
       
   508 #endif
       
   509 	};
       
   510 #endif
       
   511 
       
   512