private void RemoveFromList(int pageIndex, ref ExpiresPageList list)
{
Debug.Assert((list._head == -1) == (list._tail == -1), "(list._head == -1) == (list._tail == -1)");
if ((_pages[(pageIndex)]._pagePrev) != -1)
{
Debug.Assert((_pages[((_pages[(pageIndex)]._pagePrev))]._pageNext) == pageIndex, "PageNext(PagePrev(pageIndex)) == pageIndex");
(_pages[((_pages[(pageIndex)]._pagePrev))]._pageNext) = (_pages[(pageIndex)]._pageNext);
}
else
{
Debug.Assert(list._head == pageIndex, "list._head == pageIndex");
list._head = (_pages[(pageIndex)]._pageNext);
}
if ((_pages[(pageIndex)]._pageNext) != -1)
{
Debug.Assert((_pages[((_pages[(pageIndex)]._pageNext))]._pagePrev) == pageIndex, "PagePrev(PageNext(pageIndex)) == pageIndex");
(_pages[((_pages[(pageIndex)]._pageNext))]._pagePrev) = (_pages[(pageIndex)]._pagePrev);
}
else
{
Debug.Assert(list._tail == pageIndex, "list._tail == pageIndex");
list._tail = (_pages[(pageIndex)]._pagePrev);
}
(_pages[(pageIndex)]._pagePrev) = -1;
(_pages[(pageIndex)]._pageNext) = -1;
}
private int RemoveFromListHead(ref ExpiresPageList list)
{
int pageIndex = list._head;
this.RemoveFromList(pageIndex, ref list);
return(pageIndex);
}
private void MoveToListTail(int pageIndex, ref ExpiresPageList list)
{
if (list._tail != pageIndex)
{
this.RemoveFromList(pageIndex, ref list);
this.AddToListTail(pageIndex, ref list);
}
}
private void MoveToListHead(int pageIndex, ref ExpiresPageList list)
{
if (list._head != pageIndex)
{
this.RemoveFromList(pageIndex, ref list);
this.AddToListHead(pageIndex, ref list);
}
}
private int RemoveFromListHead(ref ExpiresPageList list)
{
Debug.Assert(list._head != -1, "list._head != -1");
int oldHead = list._head;
RemoveFromList(oldHead, ref list);
return(oldHead);
}
private void MoveToListTail(int pageIndex, ref ExpiresPageList list)
{
Debug.Assert(list._head != -1, "list._head != -1");
Debug.Assert(list._tail != -1, "list._tail != -1");
if (list._tail == pageIndex)
{
return;
}
RemoveFromList(pageIndex, ref list);
AddToListTail(pageIndex, ref list);
}
private void AddToListTail(int pageIndex, ref ExpiresPageList list)
{
this._pages[pageIndex]._pageNext = -1;
this._pages[pageIndex]._pagePrev = list._tail;
if (list._tail != -1)
{
this._pages[list._tail]._pageNext = pageIndex;
}
else
{
list._head = pageIndex;
}
list._tail = pageIndex;
}
private void AddToListTail(int pageIndex, ref ExpiresPageList list)
{
Debug.Assert((list._head == -1) == (list._tail == -1), "(list._head == -1) == (list._tail == -1)");
(_pages[(pageIndex)]._pageNext) = -1;
(_pages[(pageIndex)]._pagePrev) = list._tail;
if (list._tail != -1)
{
Debug.Assert((_pages[(list._tail)]._pageNext) == -1, "PageNext(list._tail) == -1");
(_pages[(list._tail)]._pageNext) = pageIndex;
}
else
{
list._head = pageIndex;
}
list._tail = pageIndex;
}
private void RemoveFromList(int pageIndex, ref ExpiresPageList list)
{
if (this._pages[pageIndex]._pagePrev != -1)
{
this._pages[this._pages[pageIndex]._pagePrev]._pageNext = this._pages[pageIndex]._pageNext;
}
else
{
list._head = this._pages[pageIndex]._pageNext;
}
if (this._pages[pageIndex]._pageNext != -1)
{
this._pages[this._pages[pageIndex]._pageNext]._pagePrev = this._pages[pageIndex]._pagePrev;
}
else
{
list._tail = this._pages[pageIndex]._pagePrev;
}
this._pages[pageIndex]._pagePrev = -1;
this._pages[pageIndex]._pageNext = -1;
}