static private void UnrefReaderAndVersion_Unlocked (ReaderAndVersion rav)
{
rav.Refcount--;
if (rav.Refcount == 0) {
reader_rav_map.Remove (rav.Reader);
directory_rav_map.Remove (rav.Reader.Directory ());
rav.Reader.Close ();
}
}
static public IndexReader GetReader (Lucene.Net.Store.Directory directory)
{
IndexReader reader;
long version;
lock (reader_rav_map) {
ReaderAndVersion rav = (ReaderAndVersion) directory_rav_map [directory];
if (rav == null) {
version = IndexReader.GetCurrentVersion (directory);
reader = IndexReader.Open (directory);
rav = new ReaderAndVersion (reader, version);
rav.Refcount ++; // add one refcount to keep this reader open until...
directory_rav_map [directory] = rav;
reader_rav_map [reader] = rav;
return reader;
}
version = IndexReader.GetCurrentVersion (directory);
if (version != rav.Version) {
// unref once and then close reader or call UnrefReaderAndVersion_Unlocked as a single step
UnrefReaderAndVersion_Unlocked (rav);
reader = IndexReader.Open (directory);
rav = new ReaderAndVersion (reader, version);
directory_rav_map [directory] = rav;
reader_rav_map [reader] = rav;
} else {
rav.Refcount++;
}
return rav.Reader;
}
}
