internal Page ModifyPage(long num, Tree tree, Page page)
{
_env.AssertFlushingNotFailed();
page = page ?? GetReadOnlyPage(num);
if (page.Dirty)
{
return(page);
}
if (_dirtyPages.Contains(num))
{
page.Dirty = true;
return(page);
}
var newPage = AllocatePage(1, PageFlags.None, num); // allocate new page in a log file but with the same number
Memory.Copy(newPage.Base, page.Base, AbstractPager.PageSize);
newPage.LastSearchPosition = page.LastSearchPosition;
newPage.LastMatch = page.LastMatch;
tree.RecentlyFoundPages.Reset(num);
TrackWritablePage(newPage);
return(newPage);
}
internal Page ModifyPage(long num, Page page)
{
_env.AssertFlushingNotFailed();
if (_dirtyPages.Contains(num))
{
page = GetPageForModification(num, page);
page.Dirty = true;
return(page);
}
page = GetPageForModification(num, page);
var newPage = AllocatePage(1, PageFlags.None, num); // allocate new page in a log file but with the same number
MemoryUtils.Copy(newPage.Base, page.Base, AbstractPager.PageSize);
newPage.LastSearchPosition = page.LastSearchPosition;
newPage.LastMatch = page.LastMatch;
return(newPage);
}