Simulation of bounded-buffer problem, with two implementations;

The main directory has files common to both implementations -- the
main program test-bounded-buffer.c, two .h files for this problem,
and a getint.h with a function to convert a command-line argument
to an integer with error checking.

Each subdirectory has a bounded-buffer.c file representing an
implementation of the synchronization-related parts of the problem,
plus links and a Makefile to allow building the main program.

To build programs:

cd to subdirectory (semaphore or monitor) and "make test-bounded-buffer"