是否可以在不创建新goroutine的情况下回调函数？

Question

I am trying to implement Reliable-UDP in golang.

One of the basic features I need to implement is packet-retransmission.

The naive method is as follows:

1. send a packet;
2. create a timer (also will create a new goroutine) to check if ACK is received before timer fires.

It is simple, but creation a lot of goroutine is NOT FREE. And I do NOT think implementation of packet-retransmission in TCP uses this method.

So, is there a way to callback a function without creating a new goroutine?

I have checked the post from golang-nuts ( https://groups.google.com/forum/#!topic/golang-nuts/ja8j7wQUB-0), and still can not figure out a solution.

Answer 1

You can create one timer object with time.NewTicker this will provide with a channel that sends a message periodically.