public IRawFile GetFile(IColumnMetadata column, int fileID, EDataType dataType, long recordHint)
{
var fieldName = column.FileName;
var filename = fieldName + GetExtension(dataType);
Thread.MemoryBarrier();
IRawFile file = _openedFiles[fileID];
if (file == null)
{
// Size of read chunks. Rounded to power of 2.
var bitHint = GetBitHint(dataType, recordHint, column.HintDistinctCount, column.AvgSize);
file = Open(filename, fileID, column.ColumnID, dataType, bitHint);
var existing = Interlocked.CompareExchange(ref _openedFiles[fileID], file, null);
if (existing != null)
{
file.Dispose();
return(existing);
}
}
return(file);
}