mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
613 lines
18 KiB
613 lines
18 KiB
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// EmptyVolumeCache.cpp
|
|
//
|
|
// Copyright (C) 1998, 1999 Microsoft Corporation. All rights reserved.
|
|
//
|
|
// Abstract :
|
|
//
|
|
// This is the implementation of IEmptyVolumeCache
|
|
//
|
|
// History :
|
|
//
|
|
// 10/12/1999 jchauvin/luish Created
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <assert.h>
|
|
#include "AppMan.h"
|
|
#include "AppManAdmin.h"
|
|
#include "emptyvc.h"
|
|
#include "resource.h"
|
|
#include "ApplicationManager.h"
|
|
#include "AppManDebug.h"
|
|
#include "ExceptionHandler.h"
|
|
#include "ExceptionHandler.h"
|
|
#include "Lock.h"
|
|
#include "StructIdentifiers.h"
|
|
#include "Global.h"
|
|
#include "RegistryKey.h"
|
|
|
|
#ifdef DBG_MODULE
|
|
#undef DBG_MODULE
|
|
#endif
|
|
|
|
#define DBG_MODULE DBG_EMPTYVOLUMECACHE
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
CEmptyVolumeCache::CEmptyVolumeCache(void)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::CEmptyVolumeCache (void)");
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
CEmptyVolumeCache::CEmptyVolumeCache(CApplicationManagerRoot * lpParent)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::CEmptyVolumeCache (CApplicationManagerRoot *pParent)");
|
|
|
|
HRESULT hResult = S_OK;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
try
|
|
{
|
|
assert(NULL != lpParent);
|
|
|
|
m_lpoParentObject = lpParent;
|
|
m_oInformationManager.Initialize();
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
catch(CAppManExceptionHandler * pException)
|
|
{
|
|
hResult = pException->GetResultCode();
|
|
delete pException;
|
|
}
|
|
|
|
catch(...)
|
|
{
|
|
hResult = E_UNEXPECTED;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
CEmptyVolumeCache::~CEmptyVolumeCache(void)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::~CEmptyVolumeCache (void)");
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
STDMETHODIMP CEmptyVolumeCache::QueryInterface(REFIID RefIID, LPVOID * lppVoidObject)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::QueryInterface (REFIID RefIID, LPVOID * lppVoidObject)");
|
|
|
|
if (NULL == m_lpoParentObject)
|
|
{
|
|
return E_NOINTERFACE;
|
|
}
|
|
|
|
return m_lpoParentObject->QueryInterface(RefIID, lppVoidObject);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
STDMETHODIMP_(ULONG) CEmptyVolumeCache::AddRef(void)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::AddRef (void)");
|
|
|
|
if (NULL != m_lpoParentObject)
|
|
{
|
|
return m_lpoParentObject->AddRef();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
STDMETHODIMP_(ULONG) CEmptyVolumeCache::Release(void)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::Release (void)");
|
|
|
|
if (NULL != m_lpoParentObject)
|
|
{
|
|
return m_lpoParentObject->Release();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
STDMETHODIMP CEmptyVolumeCache::Initialize(HKEY /*hRegKey*/, LPCWSTR lpwszVolume, LPWSTR * lppwszDisplayName, LPWSTR * lppwszDescription, DWORD * lpdwFlags)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::Initialize (HKEY hRegKey, LPCWSTR lpwszVolume, LPWSTR * lppwszDisplayName, LPWSTR * lppwszDescription, DWORD * lpdwFlags)");
|
|
|
|
HRESULT hResult = S_OK;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
try
|
|
{
|
|
CRegistryKey oRegistryKey;
|
|
DWORD dwSize;
|
|
DWORD dwType;
|
|
CHAR cBuffer[20];
|
|
|
|
//
|
|
// Now Get Day Threshold from Registry
|
|
//
|
|
|
|
oRegistryKey.OpenKey(HKEY_LOCAL_MACHINE, "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\VolumeCaches\\Delete Game Manager Files", KEY_READ);
|
|
dwSize = sizeof(cBuffer);
|
|
hResult = oRegistryKey.GetValue("DiskCleanerDayThreshold", &dwType, (LPBYTE) cBuffer, &dwSize);
|
|
m_dwDiskCleanerDayThreshold = *((LPDWORD) cBuffer);
|
|
|
|
//
|
|
// Check to make sure sub key exists and correct type and size, else use default
|
|
//
|
|
|
|
if (FAILED(hResult)||(dwType != REG_DWORD)||(dwSize != sizeof(DWORD)))
|
|
{
|
|
m_dwDiskCleanerDayThreshold = DISKCLEANER_DAY_THRESHOLD;
|
|
}
|
|
|
|
//
|
|
// Now convert Day Threshold into String
|
|
//
|
|
|
|
_ltow(m_dwDiskCleanerDayThreshold, m_wszDiskCleanerDayTH, 10);
|
|
|
|
//
|
|
// Break Strings into several parts for easier localization, and because string table is
|
|
// limited to 1024 per string
|
|
//
|
|
|
|
GetResourceStringW(IDS_DISKCLEANERNAME1, m_wszDiskCleanerName, sizeof(m_wszDiskCleanerName));
|
|
GetResourceStringW(IDS_DISKCLEANERNAME2, m_wszDiskCleanerName2, sizeof(m_wszDiskCleanerName2));
|
|
wcscat(m_wszDiskCleanerName,m_wszDiskCleanerDayTH); //Append Day Threshold
|
|
wcscat(m_wszDiskCleanerName,m_wszDiskCleanerName2); //Append Rest of String;
|
|
|
|
GetResourceStringW(IDS_DISKCLEANERDESC1, m_wszDiskCleanerDesc, sizeof(m_wszDiskCleanerDesc));
|
|
GetResourceStringW(IDS_DISKCLEANERDESC2, m_wszDiskCleanerDesc2, sizeof(m_wszDiskCleanerDesc2));
|
|
wcscat(m_wszDiskCleanerDesc,m_wszDiskCleanerDayTH); //Append Day Threshold
|
|
wcscat(m_wszDiskCleanerDesc,m_wszDiskCleanerDesc2); //Append Rest of String;
|
|
|
|
*lppwszDisplayName = (LPWSTR) m_wszDiskCleanerName;
|
|
*lppwszDescription = (LPWSTR) m_wszDiskCleanerDesc;
|
|
|
|
//
|
|
// Set Volume number and make sure we are not enabled by default.
|
|
//
|
|
|
|
m_dwVolume = VolumeStringToNumber(lpwszVolume);
|
|
|
|
//
|
|
// *pdwFlags = EVCF_DONTSHOWIFZERO | EVCF_ENABLEBYDEFAULT | EVCF_ENABLEBYDEFAULT_AUTO;
|
|
//
|
|
|
|
*lpdwFlags = EVCF_DONTSHOWIFZERO;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
catch(CAppManExceptionHandler * pException)
|
|
{
|
|
hResult = pException->GetResultCode();
|
|
delete pException;
|
|
}
|
|
|
|
catch(...)
|
|
{
|
|
hResult = E_UNEXPECTED;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
return hResult;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
STDMETHODIMP CEmptyVolumeCache::GetSpaceUsed(DWORDLONG * lpdwSpaceUsed, IEmptyVolumeCacheCallBack * lpCallBack)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::GetSpaceUsed(DWORDLONG * lpdwSpaceUsed, IEmptyVolumeCacheCallBack * lpCallBack)");
|
|
|
|
HRESULT hResult = S_OK;
|
|
|
|
try
|
|
{
|
|
DWORD dwKilobytes;
|
|
DWORDLONG dwlSpaceUtilization;
|
|
|
|
|
|
GetSpaceUtilization(m_dwVolume, m_dwDiskCleanerDayThreshold, (LPDWORD) &dwKilobytes, lpCallBack);
|
|
dwlSpaceUtilization = (DWORDLONG)(dwKilobytes)*(DWORDLONG)1024;
|
|
|
|
(*lpdwSpaceUsed) = dwlSpaceUtilization;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
catch(CAppManExceptionHandler * pException)
|
|
{
|
|
hResult = pException->GetResultCode();
|
|
delete pException;
|
|
}
|
|
|
|
catch(...)
|
|
{
|
|
hResult = E_UNEXPECTED;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
return hResult;
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
STDMETHODIMP CEmptyVolumeCache::Purge(DWORDLONG dwSpaceToFree, IEmptyVolumeCacheCallBack * lpCallBack)
|
|
{
|
|
|
|
FUNCTION("CEmptyVolumeCache::Purge(DWORDLONG dwSpaceToFree, IEmptyVolumeCacheCallBack * lpCallBack)");
|
|
|
|
HRESULT hResult = S_OK;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
try
|
|
{
|
|
DWORD dwKilobytes;
|
|
|
|
dwKilobytes = (DWORD) (dwSpaceToFree / 1024);
|
|
|
|
|
|
hResult = CleanDisk(m_dwVolume, m_dwDiskCleanerDayThreshold, dwKilobytes, lpCallBack);
|
|
|
|
if (FAILED(hResult))
|
|
{
|
|
THROW(hResult);
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
catch(CAppManExceptionHandler * pException)
|
|
{
|
|
hResult = pException->GetResultCode();
|
|
delete pException;
|
|
}
|
|
|
|
catch(...)
|
|
{
|
|
hResult = E_UNEXPECTED;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
return hResult;
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
STDMETHODIMP CEmptyVolumeCache::ShowProperties(HWND /*hwnd*/)
|
|
{
|
|
return S_OK;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
STDMETHODIMP CEmptyVolumeCache::Deactivate(DWORD * /*pdwFlags*/)
|
|
{
|
|
return S_OK;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
HRESULT CEmptyVolumeCache::GetSpaceUtilization(DWORD dwDeviceIndex, DWORD dwDays, LPDWORD lpdwKilobytes, IEmptyVolumeCacheCallBack * lpCallBack)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::GetSpaceUtilization(DWORD dwDeviceIndex, DWORD dwDays, LPDWORD lpdwKilobytes, IEmptyVolumeCacheCallBack * lpCallBack)");
|
|
|
|
HRESULT hResult = S_OK;
|
|
DWORD dwKilobytesAvailable = 0;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
try
|
|
{
|
|
DEVICE_RECORD sDeviceRecord;
|
|
APPLICATION_DATA sApplicationData;
|
|
DWORD dwElapsedDays;
|
|
SYSTEMTIME stLastUsedDate;
|
|
|
|
//
|
|
// Record the initial state
|
|
//
|
|
|
|
if (FAILED(m_oInformationManager.GetDeviceInfoWithIndex(dwDeviceIndex, &sDeviceRecord)))
|
|
{
|
|
THROW(E_UNEXPECTED);
|
|
}
|
|
|
|
//
|
|
// Go through each application to determine removable diskspace consumed by game apps
|
|
// that have been last accessed over X days ago, where X = DiskCleanerDayThreshold value
|
|
// from registry. These are candidates for downsizing.
|
|
// Note: X default value = 120 days. Also, pinned apps are not considered candidates for
|
|
// downsizing, regardless of age.
|
|
//
|
|
|
|
if (S_OK == m_oInformationManager.GetOldestApplicationDataByDeviceWithIndex(dwDeviceIndex, &sApplicationData))
|
|
{
|
|
do
|
|
{
|
|
//
|
|
// Get the age of the application
|
|
//
|
|
|
|
stLastUsedDate = sApplicationData.sAgingInfo.stLastUsedDate;
|
|
dwElapsedDays = ElapsedDays(&stLastUsedDate);
|
|
|
|
//
|
|
// Determine amount that can be freed sApplicationRecord
|
|
//
|
|
|
|
if ((dwElapsedDays >= dwDays)&&(APP_CATEGORY_ENTERTAINMENT & sApplicationData.sBaseInfo.dwCategory)&&(sApplicationData.sBaseInfo.dwPinState == 0))
|
|
{
|
|
dwKilobytesAvailable += sApplicationData.sBaseInfo.dwRemovableKilobytes;
|
|
hResult = lpCallBack->ScanProgress(dwKilobytesAvailable*1024, 0, NULL);
|
|
|
|
if(FAILED(hResult))
|
|
{
|
|
THROW(E_UNEXPECTED);
|
|
}
|
|
}
|
|
}
|
|
while ((dwElapsedDays >= dwDays)&&(S_OK == m_oInformationManager.GetNextOldestApplicationDataByDeviceWithIndex(dwDeviceIndex, &sApplicationData)));
|
|
}
|
|
|
|
//
|
|
// Now pass back the available kilobytes
|
|
//
|
|
|
|
*lpdwKilobytes = dwKilobytesAvailable;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
catch(CAppManExceptionHandler * pException)
|
|
{
|
|
hResult = pException->GetResultCode();
|
|
delete pException;
|
|
}
|
|
|
|
catch(...)
|
|
{
|
|
hResult = E_UNEXPECTED;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
hResult = lpCallBack->ScanProgress(dwKilobytesAvailable * 1024, EVCCBF_LASTNOTIFICATION, NULL);
|
|
if(FAILED(hResult))
|
|
{
|
|
hResult = E_UNEXPECTED;
|
|
}
|
|
|
|
return hResult;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
HRESULT CEmptyVolumeCache::CleanDisk(DWORD dwDeviceIndex, DWORD dwDays, DWORD dwKilobytesToFree, IEmptyVolumeCacheCallBack * lpCallBack)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::CleanDisk(DWORD dwDeviceIndex, DWORD dwDays, DWORD dwKilobytesToFree, IEmptyVolumeCacheCallBack * lpCallBack)");
|
|
|
|
HRESULT hResult = S_OK;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
try
|
|
{
|
|
DEVICE_SPACE_INFO sDeviceSpaceInfo;
|
|
APPLICATION_DATA sApplicationData;
|
|
DWORD dwKilobytesFreed;
|
|
DWORD dwElapsedDays;
|
|
DWORDLONG dwlMBFreed;
|
|
DWORDLONG dwlMBToFree;
|
|
SYSTEMTIME stLastUsedDate;
|
|
|
|
if (FAILED(m_oInformationManager.GetDeviceSpaceInfoWithIndex(dwDeviceIndex, &sDeviceSpaceInfo)))
|
|
{
|
|
THROW(E_UNEXPECTED);
|
|
}
|
|
|
|
//
|
|
// Record the initial state
|
|
//
|
|
|
|
dwlMBToFree = dwKilobytesToFree * 1024;
|
|
dwlMBFreed = 0;
|
|
|
|
//
|
|
// Downsize removable diskspace consumed by game apps that have been last accessed over
|
|
// X days ago, where X = DiskCleanerDayThreshold value from registry.
|
|
// Note: X default value = 120 days. Also, pinned apps are not downsized,
|
|
// regardless of age.
|
|
//
|
|
|
|
if (S_OK == m_oInformationManager.GetOldestApplicationDataByDeviceWithIndex(dwDeviceIndex, &sApplicationData))
|
|
{
|
|
do
|
|
{
|
|
//
|
|
// Get the age of the application
|
|
//
|
|
|
|
stLastUsedDate = sApplicationData.sAgingInfo.stLastUsedDate;
|
|
dwElapsedDays = ElapsedDays(&stLastUsedDate);
|
|
|
|
//
|
|
// Determine amount that can be freed sApplicationRecord
|
|
//
|
|
|
|
if ((dwElapsedDays >= dwDays)&&(APP_CATEGORY_ENTERTAINMENT & sApplicationData.sBaseInfo.dwCategory)&&(sApplicationData.sBaseInfo.dwPinState == 0))
|
|
{
|
|
m_oInformationManager.DownsizeApplication(sApplicationData.sBaseInfo.dwRemovableKilobytes, &sApplicationData);
|
|
dwKilobytesFreed = sApplicationData.sBaseInfo.dwRemovableKilobytes;
|
|
dwlMBFreed += (DWORDLONG)dwKilobytesFreed*(DWORDLONG)1024; //dwlMBFreed is cumulative up to that point
|
|
hResult = lpCallBack->PurgeProgress(dwlMBFreed,dwlMBToFree-dwlMBFreed, 0,NULL);
|
|
|
|
if (FAILED(hResult))
|
|
{
|
|
THROW(E_UNEXPECTED);
|
|
}
|
|
}
|
|
}
|
|
while ((dwElapsedDays >= dwDays)&&(S_OK == m_oInformationManager.GetNextOldestApplicationDataByDeviceWithIndex(dwDeviceIndex, &sApplicationData)));
|
|
|
|
hResult = lpCallBack->PurgeProgress(dwlMBFreed,dwlMBToFree-dwlMBFreed, EVCCBF_LASTNOTIFICATION,NULL);
|
|
if (FAILED(hResult))
|
|
{
|
|
THROW(E_UNEXPECTED);
|
|
}
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
catch(CAppManExceptionHandler * pException)
|
|
{
|
|
hResult = pException->GetResultCode();
|
|
delete pException;
|
|
}
|
|
|
|
catch(...)
|
|
{
|
|
hResult = E_UNEXPECTED;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
return hResult;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Miscellaneous functions
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
DWORD CEmptyVolumeCache::VolumeStringToNumber(LPCWSTR lpszVolume)
|
|
{
|
|
FUNCTION("CEmptyVolumeCache::VolumeStringToNumber(LPCWSTR lpszVolume)");
|
|
|
|
WORD wDrive;
|
|
DWORD dwDrive;
|
|
|
|
//
|
|
// First get the first DWORD which makes up the drive label (i.e. c:\)
|
|
//
|
|
|
|
wDrive = *(WORD *) lpszVolume;
|
|
|
|
//
|
|
// Now convert the character to uppercase
|
|
//
|
|
|
|
dwDrive = toupper((INT) wDrive);
|
|
|
|
//
|
|
// Now Subtract the ASCII index off to have a drive number from 0 - 25.
|
|
//
|
|
|
|
dwDrive -= 65;
|
|
|
|
return dwDrive;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
DWORD CEmptyVolumeCache::ElapsedDays(SYSTEMTIME * lpLastUsedDate)
|
|
{
|
|
|
|
FUNCTION("CEmptyVolumeCache::ElapsedDays(SYSTEMTIME * lpLastUsedDate)");
|
|
SYSTEMTIME stTodaysDate;
|
|
FILETIME ftTodaysDate, ftLastUsedDate;
|
|
DWORDLONG dwlTodaysDate, dwlLastUsedDate;
|
|
|
|
DWORD dwElapsedDays;
|
|
|
|
GetLocalTime(&stTodaysDate);
|
|
|
|
//
|
|
// Convert from systemtime to filetime
|
|
//
|
|
|
|
SystemTimeToFileTime(&stTodaysDate,&ftTodaysDate);
|
|
SystemTimeToFileTime(lpLastUsedDate, &ftLastUsedDate);
|
|
|
|
//
|
|
// Copy to a DWORDLONG element
|
|
//
|
|
|
|
memcpy((void *)&dwlTodaysDate,(void *)&ftTodaysDate,sizeof(DWORDLONG));
|
|
memcpy((void *)&dwlLastUsedDate,(void *)&ftLastUsedDate,sizeof(DWORDLONG));
|
|
|
|
// Conversion: 100 nsec to days
|
|
//
|
|
// 10000000 (100 nsec) 60 sec 60 min 24 hours 864000000000 (100 nsec)
|
|
// ------------------- x ------ x ------- x -------- = -----------------------
|
|
// sec min hour day day
|
|
//
|
|
|
|
if (dwlTodaysDate <= dwlLastUsedDate)
|
|
{
|
|
dwElapsedDays = 0;
|
|
}
|
|
else
|
|
{
|
|
dwElapsedDays = (DWORD)((dwlTodaysDate - dwlLastUsedDate) / (DWORDLONG) 864000000000);
|
|
}
|
|
|
|
return dwElapsedDays;
|
|
}
|