Dining philosophers problem

An implementation of the dining philosophers problem in Erlang.

Correct and buggy versions

For each solution implemented, we include two versions of the code:

• Correct version: A correct solution.
• Buggy version: A solution that contains a bug.

The buggy versions have filenames of the form *_bug.erl

Solutions

The implemented solutions always include an arbitrator process in order to avoid regular deadlocks. However, these solutions differ in the following:

• dining: The standard solution. It spawns one process for each philosopher and each fork (a truly concurrent solution).
• dining_simple: Equal to the standard solution when comparing the correct versions. However, the buggy versions are different and introduce a bug in different places (which is easier to spot in this version).
• dining_dict: Similar to the standard solution in both the correct and buggy versions, but forks state in stored in a dictionary. Thus, forks are not processes, just an attribute of the waiter process.