piframe-go/watchdog/watchdog.go

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// Adapted from https://codereview.stackexchange.com/questions/144273/watchdog-in-golang
package watchdog
import (
"time"
)
type watchdog struct {
interval time.Duration
callback func()
timer *time.Timer
}
func New(interval time.Duration, callback func()) *watchdog {
w := watchdog{
interval: interval,
callback: callback,
timer: nil,
}
return &w
}
func (w *watchdog) Start() {
w.timer = time.AfterFunc(w.interval, w.callback)
}
// Helper to allow the watchdog to be started by a call to Kick directly
func (w *watchdog) DeferredStart() {
w.Start()
w.Stop()
}
func (w *watchdog) Stop() {
w.timer.Stop()
}
func (w *watchdog) Kick() {
w.Stop()
w.timer.Reset(w.interval)
}