mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-20 20:10:22 +00:00
07b05616a0
Bumps [k8s.io/kubernetes](https://github.com/kubernetes/kubernetes) from 1.26.2 to 1.27.2. - [Release notes](https://github.com/kubernetes/kubernetes/releases) - [Commits](https://github.com/kubernetes/kubernetes/compare/v1.26.2...v1.27.2) --- updated-dependencies: - dependency-name: k8s.io/kubernetes dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes 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 waitgroup
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
)
|
|
|
|
// SafeWaitGroup must not be copied after first use.
|
|
type SafeWaitGroup struct {
|
|
wg sync.WaitGroup
|
|
mu sync.RWMutex
|
|
// wait indicate whether Wait is called, if true,
|
|
// then any Add with positive delta will return error.
|
|
wait bool
|
|
}
|
|
|
|
// Add adds delta, which may be negative, similar to sync.WaitGroup.
|
|
// If Add with a positive delta happens after Wait, it will return error,
|
|
// which prevent unsafe Add.
|
|
func (wg *SafeWaitGroup) Add(delta int) error {
|
|
wg.mu.RLock()
|
|
defer wg.mu.RUnlock()
|
|
if wg.wait && delta > 0 {
|
|
return fmt.Errorf("add with positive delta after Wait is forbidden")
|
|
}
|
|
wg.wg.Add(delta)
|
|
return nil
|
|
}
|
|
|
|
// Done decrements the WaitGroup counter.
|
|
func (wg *SafeWaitGroup) Done() {
|
|
wg.wg.Done()
|
|
}
|
|
|
|
// Wait blocks until the WaitGroup counter is zero.
|
|
func (wg *SafeWaitGroup) Wait() {
|
|
wg.mu.Lock()
|
|
wg.wait = true
|
|
wg.mu.Unlock()
|
|
wg.wg.Wait()
|
|
}
|