route/vendor/github.com/lucas-clemente/quic-go/internal/utils/timer.go

44 lines
957 B
Go

package utils
import "time"
// A Timer wrapper that behaves correctly when resetting
type Timer struct {
t *time.Timer
read bool
deadline time.Time
}
// NewTimer creates a new timer that is not set
func NewTimer() *Timer {
return &Timer{t: time.NewTimer(0)}
}
// Chan returns the channel of the wrapped timer
func (t *Timer) Chan() <-chan time.Time {
return t.t.C
}
// Reset the timer, no matter whether the value was read or not
func (t *Timer) Reset(deadline time.Time) {
if deadline.Equal(t.deadline) {
// No need to reset the timer
return
}
// We need to drain the timer if the value from its channel was not read yet.
// See https://groups.google.com/forum/#!topic/golang-dev/c9UUfASVPoU
if !t.t.Stop() && !t.read {
<-t.t.C
}
t.t.Reset(deadline.Sub(time.Now()))
t.read = false
t.deadline = deadline
}
// SetRead should be called after the value from the chan was read
func (t *Timer) SetRead() {
t.read = true
}