mirror of https://github.com/k3s-io/k3s
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
67 lines
1.7 KiB
67 lines
1.7 KiB
// Copyright 2015 The etcd Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package wait
|
|
|
|
import "sync"
|
|
|
|
type WaitTime interface {
|
|
// Wait returns a chan that waits on the given logical deadline.
|
|
// The chan will be triggered when Trigger is called with a
|
|
// deadline that is later than the one it is waiting for.
|
|
Wait(deadline uint64) <-chan struct{}
|
|
// Trigger triggers all the waiting chans with an earlier logical deadline.
|
|
Trigger(deadline uint64)
|
|
}
|
|
|
|
var closec chan struct{}
|
|
|
|
func init() { closec = make(chan struct{}); close(closec) }
|
|
|
|
type timeList struct {
|
|
l sync.Mutex
|
|
lastTriggerDeadline uint64
|
|
m map[uint64]chan struct{}
|
|
}
|
|
|
|
func NewTimeList() *timeList {
|
|
return &timeList{m: make(map[uint64]chan struct{})}
|
|
}
|
|
|
|
func (tl *timeList) Wait(deadline uint64) <-chan struct{} {
|
|
tl.l.Lock()
|
|
defer tl.l.Unlock()
|
|
if tl.lastTriggerDeadline >= deadline {
|
|
return closec
|
|
}
|
|
ch := tl.m[deadline]
|
|
if ch == nil {
|
|
ch = make(chan struct{})
|
|
tl.m[deadline] = ch
|
|
}
|
|
return ch
|
|
}
|
|
|
|
func (tl *timeList) Trigger(deadline uint64) {
|
|
tl.l.Lock()
|
|
defer tl.l.Unlock()
|
|
tl.lastTriggerDeadline = deadline
|
|
for t, ch := range tl.m {
|
|
if t <= deadline {
|
|
delete(tl.m, t)
|
|
close(ch)
|
|
}
|
|
}
|
|
}
|