Broadcasts a message (any type) continuously in another goroutine. For full package/program, check `GitHub.com/VagueCoder/Random-Go-Snippets`.

broadcast.go

// Channel is a custom type to hold channel and context variables.
type Channel struct {

	// Only unexported fields
	ch         chan interface{}
	ctx        context.Context
	cancelFunc context.CancelFunc
}

// runProducer is creates a separate goroutine that continuously produces given message.
// Unexported. No return values.
func (c *Channel) runProducer(msg interface{}) {
	go func(ctx context.Context) {
		for {
			select {
			case <-ctx.Done():
				close(c.ch)
				return
			default:
				c.ch <- msg
			}
		}
	}(c.ctx)
}