英文:
Trigger timer prematurely
问题
我有一个循环，它会休眠一段时间。然而，在我的代码的其他地方，我可能需要提前结束这段休眠时间，以便尽快执行后续的逻辑。
for {timer := time.NewTimer(30 * time.Second)<-timer.C// 做一些事情}
在其他地方...
// 触发定时器// timer.Trigger() ??
当然，timer.Stop()会停止定时器，但它会导致程序挂起，不会执行// 做一些事情。目前，我正在将定时器重置为非常短的持续时间，以便定时器几乎立即过期。
timer.Reset(time.Millisecond)
有没有更好的方法来实现这个需求？
英文:
I have a loop that is sleeping for some period of time. However, elsewhere in my code I might need to end that sleep time prematurely so that the succeeding logic can be executed sooner.
for {timer = time.NewTimer(30 * time.Second)<-timer.C// Do something}
Elsewhere…
// Trigger timer// timer.Trigger() ??
Naturally, timer.Stop() will stop the timer, but it will then cause the program to hang and not drop down to // Do something. Currently, I am resetting the timer to a very small duration so that the timer will expire basically immediately.
timer.Reset(time.Millisecond)
Is there a better way to do this?
答案1
得分: 2
你可以使用一个取消通道：
cancel := make(chan struct{})for {timer := time.NewTimer(30 * time.Second)select {case <-timer.C:doSomething()case <-cancel:doSomething()}}
当你想忽略计时器并立即执行时，只需在 cancel 通道上发送一条消息：
cancel <- struct{}{}
英文:
You can use a cancellation channel:
cancel := make(chan struct{})for {timer = time.NewTimer(30 * time.Second)select {case <- timer.C:doSomething()case <- cancel:doSomething()}}
When you want to ignore the timer and execute immediately, just send a message on the cancel channel:
cancel <- struct{}{}
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