mirror of https://github.com/fatedier/frp
63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
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// Copyright 2017 fatedier, fatedier@gmail.com
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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 shutdown
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import (
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"sync"
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)
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type Shutdown struct {
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doing bool
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ending bool
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start chan struct{}
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down chan struct{}
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mu sync.Mutex
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}
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func New() *Shutdown {
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return &Shutdown{
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doing: false,
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ending: false,
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start: make(chan struct{}),
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down: make(chan struct{}),
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}
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}
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func (s *Shutdown) Start() {
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s.mu.Lock()
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defer s.mu.Unlock()
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if !s.doing {
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s.doing = true
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close(s.start)
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}
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}
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func (s *Shutdown) WaitStart() {
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<-s.start
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}
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func (s *Shutdown) Done() {
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s.mu.Lock()
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defer s.mu.Unlock()
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if !s.ending {
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s.ending = true
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close(s.down)
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}
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}
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func (s *Shutdown) WaitDown() {
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<-s.down
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}
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