11. The computer-readable storage medium of claim 10 , wherein determining the number of links points to the text file comprises: determining whether two links are pointing to the text file.
11. The computer-readable storage medium of claim 10 , wherein determining the number of links points to the text file comprises: determining whether two links are pointing to the text file. 12. The computer-readable storage medium of claim 11 , wherein locking the data structure based on the number of links pointing to the text file comprises: locking the data structure in response to determining the number of links pointing to the text file is two.