// Copyright (c) 1998-2009 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:

 // e32\include\nkern\win32\nk_plat.h

 // 

 // WARNING: This file contains some APIs which are internal and are subject

 //          to change without notice. Such APIs should therefore not be used

 //          outside the Kernel and Hardware Services package.

 //

 /**

  @file

  @internalComponent

 */

 #ifndef __NK_WIN32_H__

 #define __NK_WIN32_H__

 #define _CRTIMP			// we want to use the win32 static runtime library

 #define WIN32_LEAN_AND_MEAN

 #define _WIN32_WINNT 0x0400

 #include <windows.h>

 typedef void (*TExcHandler)(TAny*,TAny*);

 struct TWin32ExcInfo

 	{

 	enum {EExcInKernel = 0x1};

 public:

 	TExcHandler iHandler;

 	TAny* iParam[2];

 	TUint iFlags;

 	// ExcType, iExcId, iFaultAddress, iEax, iEcx, iEdx, iEbx, iEsp, iEbp, iEsi, iEdi,

 	// iSs, iDs, iEs, iFs, iGs, iEflags, iEip, iCs

 	TUint32	iExcType;	// filled in by EPOC

 	TUint32 iExcCode;

 	TUint32 iExcDataAddress;

 	TUint32 iEax;

 	TUint32 iEcx;

 	TUint32 iEdx;

 	TUint32 iEbx;

 	TUint32 iEsp;

 	TUint32 iEsi;

 	TUint32 iEdi;

 	TUint32 iSs;

 	TUint32 iDs;

 	TUint32 iEs;

 	TUint32 iFs;

 	TUint32 iGs;

 	TUint32 iEflags;

 	TUint32 iCs;

 	TUint32 iEbp;

 	TUint32 iEip;

 	};

 enum TEmulThreadType

 	{

 	EThreadEvent,	// an 'interrupt' thread, interacts with Win32 events

 	EThreadNKern	// a nKern thread, identified by a NThread control block

 	};

 class NThread : public NThreadBase

 	{

 public:

 	typedef void (*TDivert)();

 	enum TWakeup {ERelease,EResume,EResumeLocked,EIdle,EEscaped,EResumeDiverted};

 	enum TSelectCpu {ECpuAll=-1,ECpuSingle=-2};

 public:

 	TInt Create(SNThreadCreateInfo& aInfo, TBool aInitial);

 	void Stillborn();

 	void DoForceExit();

 //

 	IMPORT_C static void Idle();

 	IMPORT_C static void SetProperties(TBool aTrace, TInt aCpu);

 	TBool WakeUp();

 	TBool IsSafeToPreempt();

 	void Divert(TDivert aDivert);

 	void ApplyDiversion();

 private:

 	static DWORD WINAPI StartThread(LPVOID aParam);

 //

 	static void ExitSync();

 	static void ExitAsync();

 //

 	static void Exception();

 	static LONG WINAPI ExceptionFilter(EXCEPTION_POINTERS* aExc);

 public:

 	static void Diverted();

 	// Has to be accessible to code user-side via emulator.lib

 	static DWORD ExceptionHandler(EXCEPTION_RECORD* aException, CONTEXT* aContext);

 public:

 	HANDLE iWinThread;

 	DWORD iWinThreadId;

 	HANDLE iScheduleLock;	// event used for scheduling interlock

 	TBool iDiverted;		// flag to indicate that the thread is being diverted

 	TDivert iDivert;		// function to invoke after reschedule, may be null

 	TAny* iDivertReturn;    // return address from diversion

 	TInt iInKernel;			// flag to indicate if the thread is running 'in' the kernel

 	TWakeup iWakeup;		// indicates how to wake up the thread

 	TLinAddr iUserStackBase;

 	};

 IMPORT_C HANDLE CreateWin32Thread(TEmulThreadType aType, LPTHREAD_START_ROUTINE aThreadFunc, LPVOID aPtr, TBool aRun);

 IMPORT_C void StartOfInterrupt();

 IMPORT_C void EndOfInterrupt();

 void SchedulerInit(NThread& aInit);

 void SchedulerRegister(NThread& aSelf);

 NThread* SchedulerThread();

 NThread& CheckedCurrentThread();

 void SchedulerLock();

 void SchedulerUnlock();

 void SchedulerEscape();

 void SchedulerReenter();

 void Win32FindNonPreemptibleFunctions();

 inline void EnterKernel(TBool aCheck=TRUE)

 	{

 	if (++CheckedCurrentThread().iInKernel==1 && aCheck)

 		{

 		NThread& t = CheckedCurrentThread();

 		__NK_ASSERT_ALWAYS(t.iCsCount==0);

 		__NK_ASSERT_ALWAYS(t.iHeldFastMutex==0);

 		__NK_ASSERT_ALWAYS(TheScheduler.iKernCSLocked==0);

 		}

 	}

 void LeaveKernel();

 IMPORT_C TInt __fastcall Dispatch(TInt aFunction, TInt* aArgs);

 typedef TInt (__cdecl *TExecHandler)(TInt,TInt,TInt,TInt);

 typedef void (__cdecl *TPreprocessHandler)(TInt*,TUint32);

 // Emulator nKern scheduling data

 class Win32Interrupt

 	{

 public:

 	void Init();

 	TInt Mask();

 	void Restore(TInt aLevel);

 	void Begin();

 	void End();

 	inline TBool InInterrupt() const

 		{return iInterrupted!=0;}	

 	void ForceReschedule();

 	inline TBool InterruptsStatus(TBool aRequest) const

 	{return aRequest?(iLevel==0):(iLevel!=0);}

 private:

 	static void Reschedule(TAny*);

 private:

 	TInt iLock;

 	HANDLE iQ;

 	DWORD iOwner;

 	TInt iLevel;

 	TBool iRescheduleOnExit;

 	NThread* iInterrupted;

 	NThread iScheduler;

 	};

 extern TBool Win32AtomicSOAW;	// flag to indicate availability of SignalObjectAndWait() API

 extern TBool Win32TraceThreadId;

 extern TInt Win32SingleCpu;

 extern Win32Interrupt Interrupt;

 // Emulator nKern exception data

 extern TAny* Win32ExcAddress;

 extern TAny* Win32ExcDataAddress;

 extern TUint Win32ExcCode;

 void FastCounterInit();

 #endif