philkmills | Threads

When I started this, I was handling background database updates by keeping control of which thread was allowed access at any one time. This worked fine for simple cases but was starting to look top-heavy. The recommended method is to have each thread maintain its own "scratchpad" of modified objects and, when there's a commit, merge the changes into any other affected threads.

It took a bit of a rewrite compared to the simple template code for Core Data that Apple provides but it looks as if it will be easy to work with from here on.

Bug score: Open 13, Fixed: 75.