-Fosterbtreee.c Multi-Threaded/Single Process with latching implemented with pthreads/SRW latches in a latch manager.
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-Fosterbtreef.c Multi-Threaded/Multi-Process with latching implemented with test & set locks in the btree pages with thread yield system calls during contention.
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-Fosterbtreeg.c Multi-Threaded/Multi-Process with latching implemented with test & set locks in the btree pages with Linux futex system calls duriing contention.