private Page <T> LoadPage(T key, out PageInfo pageinfo)
{
int pagenum = -1;
// find page in list of pages
bool found = false;
int pos = 0;
if (key != null)
{
pos = FindPageOrLowerPosition(key, ref found);
}
pageinfo = _pageList.GetValue(pos);
pagenum = pageinfo.PageNumber;
Page <T> page;
if (_cache.TryGetValue(pagenum, out page) == false)
{
//load page from disk
page = _index.LoadPageFromPageNumber(pagenum);
_cache.Add(pagenum, page);
}
return(page);
}
public void Commit(bool freeMemory)
{
if (_isDirty == false)
{
return;
}
using (new L(this))
{
log.Debug("writing " + _filename);
int[] keys = _cache.Keys();
Array.Sort(keys);
foreach (int k in keys)
{
MGRB bmp = null;
if (_cache.TryGetValue(k, out bmp) && bmp.isDirty)
{
bmp.Optimize();
SaveBitmap(k, bmp);
bmp.isDirty = false;
}
}
Flush();
if (freeMemory)
{
if (Global.UseLessMemoryStructures)
{
_cache = new SafeSortedList <int, MGRB>();
}
else
{
_cache = new SafeDictionary <int, MGRB>();
}
log.Debug(" freeing cache");
}
_isDirty = false;
}
}
public bool Get(int index)
{
lock (_lock)
{
if (_state == TYPE.Indexes)
{
bool b = false;
var f = _offsets.TryGetValue((uint)index, out b);
if (f)
{
return(b);
}
else
{
return(false);
}
}
CheckBitArray();
Resize(index);
return(internalGet(index));
}
}
