producer/consumer code (working)

threads-sema/README.md

@@ -24,6 +24,25 @@ prompt> make
 prompt> ./binary
 ```
 
+# Producer/Consumer
+
+Code for the working producer/consumer solution from the text,
+found in `producer_consumer.c`.
+
+Run `make` to build, and `producer_consumer` to test it.
+The program takes a few different arguments:
+- The number of buffers between the producer/consumer
+- The number of times a producer should produce something
+- The number of consumer threads
+
+```sh
+prompt> make
+prompt> ./producer_consumer 1 1000 1
+```
+
+The output should print each produced item once, and show which
+consumer consumed each produced item.
+
 
 # Dining Philosophers