Get Programming with Go

Lesson 31. Concurrent state

After reading lesson 31, you’ll be able to

• Keep state safe
• Use mutexes and reply channels
• Employ service loops

Here we are back in the gopher factory. The busy gophers are still building things, but several of the production lines are running low on stock, so they need to order more.

Unfortunately, this is an old-fashioned factory that only has a single shared phone landline to the outside world. All the production lines have their own handset, though. A gopher picks up the phone to place an order, but as she starts speaking, another gopher picks up another handset and starts dialing, interfering with the first gopher. Then another does the same thing and they all get very confused and none of them manage to ...