191 lines
3.4 KiB
C++
191 lines
3.4 KiB
C++
#include "shellprv.h"
|
|
#pragma hdrstop
|
|
|
|
#include "subdata.h"
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
BOOL CSubData::Init(CSubDataProvider* pSDProv, SUBDATACB fctCB, PVOID pvData)
|
|
{
|
|
_pSDProv = pSDProv;
|
|
_fctCB = fctCB;
|
|
|
|
_pvData = pvData;
|
|
|
|
#ifdef DEBUG
|
|
ASSERT(!_fInited);
|
|
_fInited = TRUE;
|
|
#endif
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL CSubData::InitStatic(STATICSUBDATACB fctStaticCB, PVOID pvData)
|
|
{
|
|
_fStatic = TRUE;
|
|
|
|
_fctStaticCB = fctStaticCB;
|
|
|
|
_pvData = pvData;
|
|
|
|
#ifdef DEBUG
|
|
ASSERT(!_fInited);
|
|
_fInited = TRUE;
|
|
#endif
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL CSubData::InitExpiration(DWORD cTick)
|
|
{
|
|
ASSERT(_fInited);
|
|
|
|
_cTickExpiration = cTick;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL CSubData::Update()
|
|
{
|
|
ASSERT(_fInited);
|
|
|
|
BOOL fNeedUpdate = FALSE;
|
|
BOOL fRet = TRUE;
|
|
|
|
if (!_fHoldUpdate)
|
|
{
|
|
// Check if we need to update the info?
|
|
|
|
if (_IsValid())
|
|
{
|
|
// Did we at least update once?
|
|
if (!_GetTickLastUpdate())
|
|
{
|
|
// No
|
|
fNeedUpdate = TRUE;
|
|
}
|
|
else
|
|
{
|
|
// Is the information expired?
|
|
if (_IsExpired())
|
|
{
|
|
// Yes
|
|
fNeedUpdate = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!_IsValid() || fNeedUpdate)
|
|
{
|
|
_fInvalid = FALSE;
|
|
|
|
fRet = _Call();
|
|
}
|
|
|
|
// TBDTBD: in DEBUG_PARANOID do call anyway to see if accurate
|
|
}
|
|
|
|
return fRet;
|
|
}
|
|
|
|
void CSubData::HoldUpdates()
|
|
{
|
|
ASSERT(_fInited);
|
|
|
|
_fHoldUpdate = TRUE;
|
|
}
|
|
|
|
void CSubData::ResumeUpdates()
|
|
{
|
|
ASSERT(_fInited);
|
|
|
|
_fHoldUpdate = FALSE;
|
|
}
|
|
|
|
void CSubData::Invalidate()
|
|
{
|
|
_fInvalid = TRUE;
|
|
}
|
|
|
|
CSubData::CSubData() : _cTickExpiration(EXPIRATION_NEVER)
|
|
{}
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
BOOL CSubData::_Call()
|
|
{
|
|
// TBDTBD: Getsystemtime for stats
|
|
|
|
BOOL fRet = TRUE;
|
|
|
|
if (!_fStatic)
|
|
{
|
|
if (_fctCB)
|
|
{
|
|
// Calling with the CSubDataProvider ptr the passed in
|
|
// CSubDataProvider's member fct
|
|
fRet = (_pSDProv->*_fctCB)(_GetDataPtr());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (_fctStaticCB)
|
|
{
|
|
fRet = _fctStaticCB(_GetDataPtr());
|
|
}
|
|
}
|
|
|
|
_SetTickLastUpdate(GetTickCount());
|
|
|
|
return fRet;
|
|
}
|
|
|
|
void CSubData::_SetTickLastUpdate(DWORD dwTick)
|
|
{
|
|
_dwTickLast = dwTick;
|
|
}
|
|
|
|
DWORD CSubData::_GetTickLastUpdate()
|
|
{
|
|
return _dwTickLast;
|
|
}
|
|
|
|
DWORD* CSubData::_GetTickLastUpdatePtr()
|
|
{
|
|
return &_dwTickLast;
|
|
}
|
|
|
|
PVOID CSubData::_GetDataPtr()
|
|
{
|
|
ASSERT(_pvData);
|
|
|
|
return _pvData;
|
|
}
|
|
|
|
void CSubData::_SetDataPtr(PVOID pvData)
|
|
{
|
|
_pvData = pvData;
|
|
}
|
|
|
|
BOOL CSubData::_IsExpired()
|
|
{
|
|
BOOL fExpired = FALSE;
|
|
DWORD dwTickCurrent = GetTickCount();
|
|
|
|
// Is the information expired? Check also for the wrapping case.
|
|
if ((EXPIRATION_NEVER != _cTickExpiration) && ((_GetTickLastUpdate() > dwTickCurrent) ||
|
|
((dwTickCurrent - _GetTickLastUpdate()) > _cTickExpiration)))
|
|
{
|
|
// Yes
|
|
fExpired = TRUE;
|
|
}
|
|
|
|
return fExpired;
|
|
}
|
|
|
|
BOOL CSubData::_IsValid()
|
|
{
|
|
return !_fInvalid;
|
|
}
|