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232 lines
3.8 KiB
232 lines
3.8 KiB
/*++
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Copyright (c) 1994-1999 Microsoft Corporation
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Module Name :
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scache.cpp
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Abstract:
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IIS Server cache
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Author:
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Ronald Meijer (ronaldm)
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Project:
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Internet Services Manager (cluster edition)
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Revision History:
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--*/
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#include "stdafx.h"
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#include "common.h"
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#include "InetMgrApp.h"
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#include "iisobj.h"
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#include "scache.h"
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#ifdef _DEBUG
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#undef THIS_FILE
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static char BASED_CODE THIS_FILE[] = __FILE__;
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#endif
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#define new DEBUG_NEW
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//
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// CIISServerCache implementation
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//
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// <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
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BOOL
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CIISServerCache::Add(
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IN CIISMachine * pMachine
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)
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/*++
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Routine Description:
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Add server to server cache.
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Arguments:
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CIISMachine * pMachine : Pointer to machine
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Return Value:
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TRUE if the machine was added.
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FALSE if it was not (already existed)
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Notes:
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The CIISMachine pointer is not owned by the cache.
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--*/
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{
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BOOL fTossed = FALSE;
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int nSwitch;
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CIISMachine * pCurrent;
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POSITION pos = GetHeadPosition();
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//
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// Find proper insertion point. Fairly lame linear search,
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// but cache is not expected to contain above a dozen items or so
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// and routine is not called often.
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//
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while(pos)
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{
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pCurrent = (CIISMachine *)GetAt(pos);
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nSwitch = pMachine->CompareScopeItem(pCurrent);
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if (nSwitch < 0)
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{
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InsertBefore(pos, pMachine);
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break;
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}
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if (nSwitch == 0)
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{
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++fTossed;
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break;
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}
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CPtrList::GetNext(pos);
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}
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if (!pos)
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{
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AddTail(pMachine);
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}
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//
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// Remember to save changes
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//
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if (!fTossed)
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{
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SetDirty();
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}
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#ifdef _DEBUG
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//
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// Do a quick sanity check of the cache
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//
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int cLocals = 0;
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CIISMachine * pPrev = NULL;
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pCurrent = GetFirst();
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while(pCurrent)
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{
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if (pPrev)
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{
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//
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// Make sure the list is sorted
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//
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ASSERT(pCurrent->CompareScopeItem(pPrev) > 0);
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}
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pPrev = pCurrent;
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pCurrent = GetNext();
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}
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//
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// Only one local computer
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//
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ASSERT(cLocals <= 1);
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#endif // _DEBUG
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return !fTossed;
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}
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BOOL
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CIISServerCache::Remove(
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IN CIISMachine * pMachine
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)
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/*++
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Routine Description:
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Remove server from the cache.
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Arguments:
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CIISMachine * pMachine : Server to be removed
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Return Value:
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TRUE for success, FALSE for failure
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--*/
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{
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BOOL fRemoved = FALSE;
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int nSwitch;
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CIISMachine * pCurrent;
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POSITION pos = GetHeadPosition();
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//
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// Look for machine object to be deleted
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//
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// ISSUE: We can currently rely on the actual CIISMachine ptr
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// to be matched, though we don't take advantage of that
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// with improved search.
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//
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while(pos)
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{
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pCurrent = (CIISMachine *)GetAt(pos);
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nSwitch = pMachine->CompareScopeItem(pCurrent);
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if (nSwitch < 0)
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{
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//
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// Not in the list -- won't find it either
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//
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ASSERT_MSG("Attempting to remove non-existing machine");
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break;
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}
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if (nSwitch == 0)
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{
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//
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// Found it. If the ASSERT fires, check the "ISSUE" above
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//
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ASSERT(pCurrent == pMachine);
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RemoveAt(pos);
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++fRemoved;
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break;
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}
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CPtrList::GetNext(pos);
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}
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//
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// Remember to save changes
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//
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if (fRemoved)
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{
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SetDirty();
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}
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return fRemoved;
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}
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