private void RefreshCache(int SectorNumber)
{
if (SectorCached == SectorNumber)
{
return;
}
if (SectorCached != -1 && CommitCacheRequired)
{
CommitCacheRequired = false;
StoreM2(SectorCached, Cache);
}
byte b = 0;
var data = GetSector(SectorNumber, ref b);
try
{
unsafe
{
fixed(byte *ptrBuffer = &data[0])
{
Cache = (M2Sector)
Marshal.PtrToStructure(new IntPtr(ptrBuffer),
typeof(M2Sector));
}
}
SectorCached = SectorNumber;
}
catch (Exception e)
{
STrace.Debug(typeof(GR2).FullName, e.ToString());
SectorCached = -1;
}
}
private void StoreM2(int sector, M2Sector M2)
{
using (var sw = File.OpenWrite(FileName))
{
var data = new byte[512];
sw.Seek(sector * 512 + 512, SeekOrigin.Begin);
unsafe
{
fixed(byte *ptrBuffer = &data[0])
{
Marshal.StructureToPtr(M2, new IntPtr(ptrBuffer), true);
}
}
sw.Write(data, 0, data.GetLength(0));
sw.Close();
Repository.TransactionLog.SectorTouch(FileName, sector);
}
}
