ciop.cpp

来自「PGP8.0源码 请认真阅读您的文件包然后写出其具体功能」· C++ 代码 · 共 122 行

/*____________________________________________________________________________
		Copyright (C) 2002 PGP Corporation
        All rights reserved.

        $Id: CIop.cpp,v 1.2 2002/08/06 20:09:30 dallen Exp $
____________________________________________________________________________*/

#include "pgpClassesConfig.h"

#include "CDriverSubsystemsDrv98.h"
#include "CIop.h"
#include "CIosInterface.h"

_USING_PGP

// Types

typedef void (__cdecl *IopCallbackFuncType)(PIOP);


// Class CIop member functions

CIop::CIop() : mWeCreated(FALSE), mIop(NULL)
{
}

CIop::CIop(PIOP pIop) : mWeCreated(FALSE), mIop(pIop)
{
	pgpAssertAddrValid(pIop, IOP);
}

CIop::~CIop()
{
	if (WeCreated())
		Destroy();
}

PGPBoolean 
CIop::DoIlbCriteria() const
{
	return CDriverSubsystemsDrv98::IosInterface().IlbIoCriteria(&Ior());
}

PGPBoolean 
CIop::DoInternalIlbCriteria() const
{
	return CDriverSubsystemsDrv98::IosInterface().IlbIntIoCriteria(mIop);
}

CComboError 
CIop::Create(PVRP pVrp, PGPUInt8 flags)
{
	pgpAssert(!WeCreated());

	CComboError	error;

	mSize = static_cast<PGPUInt16>(pVrp->VRP_max_req_size + 
		(pVrp->VRP_max_sgd * sizeof(SGD)));
	mOffset = static_cast<PGPUInt16>(pVrp->VRP_delta_to_ior);

	mIop = CDriverSubsystemsDrv98::IosInterface().IspCreateIop(mSize, 
		mOffset, ISP_M_FL_INTERRUPT_TIME);

	if (IsNull(mIop))
		error.pgpErr = kPGPError_VolumeOpFailed;

	if (error.IsntError())
	{
		mWeCreated = TRUE;

		Timer()		= kDefaultIopTimeout;
		TimerOrig()	= kDefaultIopTimeout;

		Next()		= NULL;
		Status()	= 0;
		Flags()		= IORF_VERSION_002;

		Callback()		= NULL;
		PrivatePort()	= kPGPdiskIopMagic;
		SgdLinPhys()	= reinterpret_cast<PSGD>(&Ior() + 1);
		NumSgds()		= 0;
	}

	return error;
}

void 
CIop::Destroy()
{
	pgpAssert(WeCreated());		

	CDriverSubsystemsDrv98::IosInterface().IspDeallocMem((PGPUInt8 *) &Ior() - 
		mOffset);

	mIop = NULL;
	mWeCreated = FALSE;
}

void 
CIop::SendCommand(const PDCB pDcb) const
{
	pgpAssertAddrValid(pDcb, DCB);

	__asm push edi
	IOS_SendCommand(&Ior(), const_cast<PDCB>(pDcb));
	__asm pop edi
}

void 
CIop::Callback(PGPUInt16 status) const
{
	Status() = status;

	--CallbackPtr();

	IopCallbackFuncType	callbackFunc	= 
		reinterpret_cast<IopCallbackFuncType>(
		CallbackPtr()->IOP_CB_address);
	
	callbackFunc(mIop);
}