Is there some elegant way to pause and resume any other goroutine?

Question

In my case, I have thousands of goroutines working simultaneously as work(). I also had a sync() goroutine. When sync starts, I need any o

Answer 1

I edited jimt's excellent example to not loop around when it reaches default case and if state == Paused.

 65         default:
 66             fmt.Printf("Default case\n")
 67             if state == Paused {
 68                 fmt.Printf("Default state Paused\n")
 69                 select {
 70                     case state = <-ws:
 71                         switch state {
 72                         case Running:
 73                             fmt.Printf("Worker %d: Running\n", id)
 74                             break
 75                         case Stopped:
 76                             fmt.Printf("Worker %d: Stopped\n", id)
 77                             return
 78                         }
 79                     break
 80                 }
 81             }
 82             fmt.Printf("Do actual work here\n")

An extra select+case, combination will be required to avoid a forever loop.