61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package wait
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import (
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"sync"
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"time"
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)
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type WaitTime interface {
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// Wait returns a chan that waits on the given deadline.
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// The chan will be triggered when Trigger is called with a
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// deadline that is later than the one it is waiting for.
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// The given deadline MUST be unique. The deadline should be
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// retrieved by calling time.Now() in most cases.
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Wait(deadline time.Time) <-chan struct{}
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// Trigger triggers all the waiting chans with an earlier deadline.
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Trigger(deadline time.Time)
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}
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type timeList struct {
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l sync.Mutex
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m map[int64]chan struct{}
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}
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func NewTimeList() *timeList {
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return &timeList{m: make(map[int64]chan struct{})}
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}
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func (tl *timeList) Wait(deadline time.Time) <-chan struct{} {
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tl.l.Lock()
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defer tl.l.Unlock()
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ch := make(chan struct{}, 1)
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// The given deadline SHOULD be unique.
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tl.m[deadline.UnixNano()] = ch
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return ch
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}
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func (tl *timeList) Trigger(deadline time.Time) {
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tl.l.Lock()
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defer tl.l.Unlock()
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for t, ch := range tl.m {
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if t < deadline.UnixNano() {
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delete(tl.m, t)
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close(ch)
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}
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}
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}
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