4 A working project for High-concurrency B-tree source code in C
6 There are five major code sets in the standard btree source code:
8 btree2s.c Single Threaded/MultiProcess version that removes keys all the way back to an original empty btree, placing removed nodes on a free list. Operates under either memory mapping or file I/O. Recommended btrees hosted on network file systems.
10 btree2t.c Single Threaded/MultiProcess version similar to btree2s except that fcntl locking has been replaced by test & set latches in the first few btree pages. Uses either memory mapping or file I/O.
12 threads2h.c Multi-Threaded/Multi-Process with latching implemented by a latch manager with pthreads/SRW latches in the first few btree pages. Recommended for Windows.
14 threads2i.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.
16 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. Recommended for linux.
18 Compilation is achieved on linux or Windows by:
20 gcc -D STANDALONE threads2h.c -lpthread
24 cl /Ox /D STANDALONE threads2h.c
26 Please see the project wiki page for additional documentation