public void Add(TKey key, ref T value)
{
index.Add(key, appendOffset);
var ptr = accessor.GetPtr(appendOffset, true);
Unsafe.Write(ptr, value);
appendOffset += valueSize;
}
private Array GetKeyArray(MemoryAccessor ma, long index, int count, Type elType)
{
var arr = Array.CreateInstance(elType, count);
Unsafe.CopyBlock(Unsafe.AsPointer(ref arr), ma.GetPtr(GetAbsoluteOffset(index) + keyOffset), (uint)(count * Marshal.SizeOf(elType)));
return(arr);
}
private void StartSort(long ps)
{
logger.LogInfo("Copying temp file...");
File.Copy(path, path + ".tmp");
logger.LogInfo("Resize temp file...");
var newFilesSize = (long)index.Count * valueSize + offset;
logger.LogInfo($"New file size: {newFilesSize}");
using (var f = File.Open(path + ".tmp", FileMode.OpenOrCreate, FileAccess.ReadWrite))
f.SetLength(newFilesSize);
logger.LogInfo("Sorting...");
var tmpAccessor = new MemoryAccessor(path + ".tmp", 0, ps);
var sortedIndex = new SortedDictionary <TKey, long>(index);
var newIndex = new Dictionary <TKey, long>();
var off = offset;
foreach (var kv in sortedIndex)
{
Unsafe.Write(tmpAccessor.GetPtr(off), accessor.Get <T>(kv.Value));
newIndex.Add(kv.Key, off);
off += valueSize;
}
accessor.Dispose();
tmpAccessor.Dispose();
logger.LogInfo("Replace files...");
File.Delete(path);
File.Move(path + ".tmp", path);
logger.LogInfo("Reload database...");
accessor = new MemoryAccessor(path, 0, pageSize);
fileSize = new FileInfo(path).Length;
index = newIndex;
}
private string GetKeyString(MemoryAccessor ma, long index, int count)
{
var sp = new Span <char>(ma.GetPtr(GetAbsoluteOffset(index) + keyOffset), count);
return(sp.Slice(0, sp.IndexOf('\0') < 0 ? count : sp.IndexOf('\0')).ToString());
}