Introduce new threads2i.c file to project

diff --git a/README.md b/README.md
index 37383fc1e66481ead5d43fc85b40c6a0e438b3a3..7b2ba8494ba565b07a52c87c3cbc0ef2c3b398e6 100644 (file)
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@ There are three major code sets in the btree source code:
 
 btree2q.c       Single Threaded/MultiProcess with latching supplied by advisory file locking.  Works with network file systems.
 threads2h.c     Multi-Threaded/Multi-Process with latching implemented with test & set locks in the btree pages.
+threads2i.c     Multi-Threaded/Multi-Process with latching implemented with test & set locks in the btree pages with Linux futex system calls for contention.
 
 The Foster set includes three types of latching: