forked from quic-go/quic-go
adc13be540
* implement a memory-optimized time.Time replacement * monotime: properly handle systems with bad timer resolution (Windows) * monotime: simplify Since
56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
package quic
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/quic-go/quic-go/internal/monotime"
|
|
"github.com/quic-go/quic-go/internal/utils"
|
|
)
|
|
|
|
var deadlineSendImmediately = monotime.Time(42 * time.Millisecond) // any value > time.Time{} and before time.Now() is fine
|
|
|
|
type connectionTimer struct {
|
|
timer *utils.Timer
|
|
last monotime.Time
|
|
}
|
|
|
|
func newTimer() *connectionTimer {
|
|
return &connectionTimer{timer: utils.NewTimer()}
|
|
}
|
|
|
|
func (t *connectionTimer) SetRead() {
|
|
if deadline := t.timer.Deadline(); deadline != deadlineSendImmediately {
|
|
t.last = deadline
|
|
}
|
|
t.timer.SetRead()
|
|
}
|
|
|
|
func (t *connectionTimer) Chan() <-chan time.Time {
|
|
return t.timer.Chan()
|
|
}
|
|
|
|
// SetTimer resets the timer.
|
|
// It makes sure that the deadline is strictly increasing.
|
|
// This prevents busy-looping in cases where the timer fires, but we can't actually send out a packet.
|
|
// This doesn't apply to the pacing deadline, which can be set multiple times to deadlineSendImmediately.
|
|
func (t *connectionTimer) SetTimer(idleTimeoutOrKeepAlive, connIDRetirement, ackAlarm, lossTime, pacing monotime.Time) {
|
|
deadline := idleTimeoutOrKeepAlive
|
|
if !connIDRetirement.IsZero() && connIDRetirement.Before(deadline) && connIDRetirement.After(t.last) {
|
|
deadline = connIDRetirement
|
|
}
|
|
if !ackAlarm.IsZero() && ackAlarm.Before(deadline) && ackAlarm.After(t.last) {
|
|
deadline = ackAlarm
|
|
}
|
|
if !lossTime.IsZero() && lossTime.Before(deadline) && lossTime.After(t.last) {
|
|
deadline = lossTime
|
|
}
|
|
if !pacing.IsZero() && pacing.Before(deadline) {
|
|
deadline = pacing
|
|
}
|
|
t.timer.Reset(deadline)
|
|
}
|
|
|
|
func (t *connectionTimer) Stop() {
|
|
t.timer.Stop()
|
|
}
|