runtime.GC() and gcTriggerHeap trigger will meet expectations, but It does not call Finalizer function when I use gcTriggerTime(sleep 120s)
like this:
(the second 60s)
(the fourth 60s)
the code is:
package main
import (
"fmt"
"runtime"
"time"
)
type dog struct {
stop chan bool
}
func (d *dog) dog_run() {
ticker := time.NewTicker(1 * time.Second)
defer ticker.Stop()
for {
select {
case <-ticker.C:
fmt.Println("bark")
case <-d.stop:
fmt.Println("stop！！！！！！！！！")
return
}
}
}
type School struct {
Students []string
dog *dog
}
func dog_stop(s *School) {
s.dog.stop <- true
}
func (s *School) new() {
watch_dog := dog{
stop: make(chan bool, 1),
}
s.dog = &watch_dog
go watch_dog.dog_run()
}
func NewSchool(names ...string) *School {
school := School{Students: names}
school.new()
runtime.SetFinalizer(&school, dog_stop)
return &school
}
func main() {
school := NewSchool([]string{"pd"}...)
fmt.Println("start school", school)
time.Sleep(time.Second * 4)
school = nil
fmt.Println("closed school")
// manual GC it does work
// runtime.GC()
// auto GC use gcTriggerHeap, it does work
// buf := make([]byte, 1024*1024*1024*10)
// buf[0] = 1
time.Sleep(time.Second * 60)
fmt.Println("wait 60")
time.Sleep(time.Second * 61) // it triger GC, should use dog_stop,but why not
fmt.Println("wait 60")
time.Sleep(time.Second * 60)
fmt.Println("wait 60")
time.Sleep(time.Second * 70)
fmt.Println("wait 70")
}
