cvolumeimpdrvnt.h

PGP8.0源码 请认真阅读您的文件包然后写出其具体功能

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

        $Id: CVolumeImpDrvNT.h,v 1.5 2002/08/06 20:09:32 dallen Exp $
____________________________________________________________________________*/

#ifndef Included_CVolumeImpDrvNT_h	// [
#define Included_CVolumeImpDrvNT_h

#include <ntdddisk.h>
#include "CVolumeImp.h"

_PGP_BEGIN

// Types

class CDevice;
class CString;
class CUnicodeString;


// Class CVolumeImpDrvNT

class CVolumeImpDrvNT : public CVolumeImp
{
	friend class CDriverImpFactoryDrvNT;

private:
	CVolumeImpDrvNT();
	~CVolumeImpDrvNT();

	const char *	DeviceName() const {return mAsciiDeviceName;}

	PGPBoolean	HasOpenFiles();

	CComboError	AttachVolume(const char *root, const char *deviceName);
	void		DetachVolume();

	CComboError	Mount(const char *deviceName, const char *root, 
		PGPUInt64 totalBlocks, PGPUInt32 blockSize, 
		const void *ioHandlerFunc, void *refPtr, PGPBoolean readOnly);
	CComboError	Unmount(PGPBoolean isForced);

	CComboError	LockForIO();
	CComboError	LockForFormat();
	CComboError	UnlockVolume();

	CComboError	Read(void *buf, PGPUInt64 pos, PGPUInt32 nBlocks) const;
	CComboError	Write(const void *buf, PGPUInt64 pos, PGPUInt32 nBlocks);

private:
	CDevice	*mPDevice;
	CString	mAsciiDeviceName;

	CDevice			mVHDevice;
	PFILE_OBJECT	mVHFileObject;
	HANDLE			mVolumeHandle;

#if	(_WIN32_WINNT >= 0x0500)

	CDevice	mMountMgr;

	CDevice			mDirDevice;
	PFILE_OBJECT	mDirFileObject;
	HANDLE			mDirHandle;

#endif	// (_WIN32_WINNT < 0x0500)

	PGPBoolean	IsVolumeHandleOpened() const
	{
		return (IsntNull(mVolumeHandle));
	}

	CComboError	MakeDeviceStrings(const char *deviceName, 
		const char *linkName, CUnicodeString& fullDevName, 
		CUnicodeString& fullLinkName) const;

#if	(_WIN32_WINNT >= 0x0500)

	CComboError	GetVolumeStrings(const char *deviceName, 
		CUnicodeString& volId, CUnicodeString& curLink) const;

	CComboError	OpenMountMgr();
	void		CloseMountMgr();

	CComboError	OpenMountPointDir(const CUnicodeString& fullDirName);
	void		CloseMountPointDir();

	CComboError	AnnounceWin2kArrival(const CUnicodeString& fullDevName);

	CComboError	CreateMountPoint(const CUnicodeString& volId, 
		const CUnicodeString& fullDevName, 
		const CUnicodeString& fullLinkName);

	CComboError	DeleteMountPoint(const CUnicodeString& volId, 
		const CUnicodeString& fullDevName, 
		const CUnicodeString& fullLinkName);

#endif	// (_WIN32_WINNT < 0x0500)

	CComboError	GetGeometry(DISK_GEOMETRY& geom);
	CComboError	GetPartitionInfo(PARTITION_INFORMATION& partInfo);
	CComboError	FillInBlockInfo();

	CComboError	OpenVolumeHandle();
	void		CloseVolumeHandle();
};

_PGP_END

#endif	// ] Included_CVolumeImpDrvNT_h