fix original problem with bt_deletekey, obviating need for btree2t.c

[btree] / README.md

diff --git a/README.md b/README.md
index 54f9d2305a605afbff87b1449b1fbb409cf7a74a..c0de3d65bc6ce030aedd0f1ab3c7f21c3cf34a50 100644 (file)
--- a/README.md
+++ b/README.md
@@ -5,7 +5,9 @@ A working project for High-concurrency B-tree source code in C
 
 There are four major code sets in the standard btree source code:
 
-btree2q.c       Single Threaded/MultiProcess with latching supplied by advisory file locking.  Works with network file systems.
+btree2s.c       Single Threaded/MultiProcess with latching supplied by advisory file locking.  Works with network file systems.  Only deletes leaf level pages.
+
+btree2t.c       Single Threaded/MultiProcess version that removes keys all the way back to an original empty btree.
 
 threads2h.c     Multi-Threaded/Multi-Process with latching implemented by a latch manager with pthreads/SRW latches in the first few btree pages.
 
@@ -13,11 +15,11 @@ threads2i.c     Multi-Threaded/Multi-Process with latching implemented by a latc
 
 threads2j.c     Multi-Threaded/Multi-Process with latching implemented by a latch manager with test & set locks in the first few btree pages with Linux futex system calls during contention.
 
-The Foster set includes three types of latching:
+The Foster code set includes the same three types of latching:
 
 Fosterbtreee.c  Multi-Threaded/Single Process with latching implemented by a latch manager with pthreads/SRW latches in the first few btree pages.
 
-Fosterbtreef.c  Multi-Threaded/Multi-Process with latching implemented by a latch manager with test & set locks in the first few btree pages with thread yield  system calls during contention.
+Fosterbtreef.c  Multi-Threaded/Multi-Process with latching implemented by a latch manager with test & set latches  in the first few btree pages with thread yield  system calls during contention.
 
 Fosterbtreeg.c  Multi-Threaded/Multi-Process with latching implemented by a latch manager with test & set locks in the first few btree pages with Linux futex system calls during contention.