// newRocksDBIterator returns a new iterator over the supplied RocksDB
// instance. If snapshotHandle is not nil, uses the indicated snapshot.
// The caller must call rocksDBIterator.Close() when finished with the
// iterator to free up resources.
func newRocksDBIterator(rdb *C.DBEngine, prefix roachpb.Key) *rocksDBIterator {
// In order to prevent content displacement, caching is disabled
// when performing scans. Any options set within the shared read
// options field that should be carried over needs to be set here
// as well.
return &rocksDBIterator{
iter: C.DBNewIter(rdb, goToCSlice(prefix)),
}
}
// newRocksDBIterator returns a new iterator over the supplied RocksDB
// instance. If snapshotHandle is not nil, uses the indicated snapshot.
// The caller must call rocksDBIterator.Close() when finished with the
// iterator to free up resources.
func newRocksDBIterator(rdb *C.DBEngine, snapshotHandle *C.DBSnapshot) *rocksDBIterator {
// In order to prevent content displacement, caching is disabled
// when performing scans. Any options set within the shared read
// options field that should be carried over needs to be set here
// as well.
return &rocksDBIterator{
iter: C.DBNewIter(rdb, snapshotHandle),
}
}
// newRocksDBIterator returns a new iterator over the supplied RocksDB
// instance. If snapshotHandle is not nil, uses the indicated snapshot.
// The caller must call rocksDBIterator.Close() when finished with the
// iterator to free up resources.
func newRocksDBIterator(rdb *C.DBEngine, prefix bool, engine Engine) Iterator {
// In order to prevent content displacement, caching is disabled
// when performing scans. Any options set within the shared read
// options field that should be carried over needs to be set here
// as well.
r := iterPool.Get().(*rocksDBIterator)
r.iter = C.DBNewIter(rdb, C.bool(prefix))
r.engine = engine
return r
}
func (r *rocksDBIterator) init(rdb *C.DBEngine, prefix bool, engine Reader) {
r.iter = C.DBNewIter(rdb, C.bool(prefix))
r.engine = engine
}