186 lines
5.3 KiB
C++
186 lines
5.3 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1992.
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//
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// File: PropIter.cxx
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//
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// Contents: Iterator for property store.
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//
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// Classes: CPropertyStoreWids
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//
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// History: 27-Dec-19 KyleP Created
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//
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//----------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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#include <prpstmgr.hxx>
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#include <propobj.hxx>
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#include <propiter.hxx>
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//+---------------------------------------------------------------------------
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//
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// Member: CPropertyStoreWids::CPropertyStoreWids, public
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//
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// Synopsis: Constructor
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//
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// Arguments: [propstore] -- Property store manager.
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//
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// History: 04-Jan-96 KyleP Created.
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// 22-Oct-97 KrishnaN Modified to take the propstore mgr
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// and iterate through its primary store.
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//
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//----------------------------------------------------------------------------
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CPropertyStoreWids::CPropertyStoreWids( CPropStoreManager & propstoremgr )
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: _propstore( propstoremgr.GetPrimaryStore() ),
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_Borrowed( propstoremgr.GetPrimaryStore()._xPhysStore.GetReference(),
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propstoremgr.GetPrimaryStore()._PropStoreInfo.RecordsPerPage(),
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propstoremgr.GetPrimaryStore()._PropStoreInfo.RecordSize() )
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{
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Init(propstoremgr.GetPrimaryStore());
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CPropertyStoreWids::CPropertyStoreWids, public
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//
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// Synopsis: Constructor
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//
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// Arguments: [propstore] -- Property store.
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//
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// History: 04-Jan-96 KyleP Created.
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// 22-Oct-97 KrishnaN Modified to take the propstore mgr
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// and iterate through its primary store.
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//
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//----------------------------------------------------------------------------
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CPropertyStoreWids::CPropertyStoreWids( CPropertyStore & propstore )
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: _propstore( propstore ),
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_Borrowed( propstore._xPhysStore.GetReference(),
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propstore._PropStoreInfo.RecordsPerPage(),
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propstore._PropStoreInfo.RecordSize() )
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{
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Init(propstore);
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CPropertyStoreWids::Init, private
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//
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// Synopsis: Constructor helper.
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//
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// Arguments: [propstore] -- Property store.
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//
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// History: 20-Nov-97 KrishnaN Created.
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//
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//----------------------------------------------------------------------------
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void CPropertyStoreWids::Init(CPropertyStore& propstore)
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{
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if ( _propstore.MaxWorkId() > 0 )
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{
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_Borrowed.Set( 1 );
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_wid = 1;
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_cRecPerPage = _propstore.RecordsPerPage();
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if ( !_Borrowed.Get()->IsTopLevel() )
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_wid = NextWorkId();
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}
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else
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_wid = widInvalid;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CPropertyStoreWids::~CPropertyStoreWids, public
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//
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// Synopsis: Destructor
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//
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// History: 04-Jan-96 KyleP Created.
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//
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//----------------------------------------------------------------------------
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CPropertyStoreWids::~CPropertyStoreWids()
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{
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CPropertyStoreWids::NextWorkId, public
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//
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// Synopsis: Advances iterator to next in-use workid.
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//
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// Returns: Next workid, or widInvalid if at end.
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//
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// History: 04-Jan-96 KyleP Created.
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//
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//----------------------------------------------------------------------------
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WORKID CPropertyStoreWids::NextWorkId()
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{
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CReadAccess lock( _propstore.GetReadWriteAccess() );
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return LokNextWorkId();
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CPropertyStoreWids::LokNextWorkId, public
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//
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// Synopsis: Advances iterator to next in-use workid, assumes at least
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// a read lock is already grabbed.
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//
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// Returns: Next workid, or widInvalid if at end.
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//
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// History: 23-Feb-96 dlee created from NextWorkId
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//
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//----------------------------------------------------------------------------
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WORKID CPropertyStoreWids::LokNextWorkId()
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{
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Win4Assert( _wid != widInvalid );
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while ( TRUE )
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{
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COnDiskPropertyRecord const * pRec = _Borrowed.Get();
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if ( pRec->IsValidType() && pRec->IsValidLength(_wid, _cRecPerPage) )
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{
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_wid = _wid + _Borrowed.Get()->CountRecords();
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}
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else
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{
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ciDebugOut(( DEB_ERROR, "Wid (0x%X) pRec (0x%X) has bad length (%d)\n",
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_wid, pRec, pRec->CountRecords() ));
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Win4Assert( !"Corruption in PropertyStore" );
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// Try to find the next valid top level record.
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_wid++;
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}
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if ( _wid > _propstore.MaxWorkId() )
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{
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_Borrowed.Release();
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_wid = widInvalid;
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break;
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}
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//
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// Make sure we acquire new buffer before releasing old. Keeps us from
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// unmapping page.
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//
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CBorrowed temp( _Borrowed );
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_Borrowed.Set( _wid );
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if ( _Borrowed.Get()->IsTopLevel() )
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break;
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}
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return _wid;
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}
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