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lock the mutation of the create boolean for safety

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This commit is contained in:
Han Kang 2019-08-18 17:46:43 -07:00
parent 8f0d626228
commit dca8c07247
1 changed files with 5 additions and 0 deletions
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5
staging/src/k8s.io/component-base/metrics/metric.go
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@ -64,12 +64,15 @@ type lazyMetric struct {
isDeprecated bool isDeprecated bool
isHidden bool isHidden bool
isCreated bool isCreated bool
createLock sync.RWMutex
markDeprecationOnce sync.Once markDeprecationOnce sync.Once
createOnce sync.Once createOnce sync.Once
self kubeCollector self kubeCollector
} }
func (r *lazyMetric) IsCreated() bool { func (r *lazyMetric) IsCreated() bool {
r.createLock.RLock()
defer r.createLock.RUnlock()
return r.isCreated return r.isCreated
} }
@ -125,6 +128,8 @@ func (r *lazyMetric) Create(version *semver.Version) bool {
return false return false
} }
r.createOnce.Do(func() { r.createOnce.Do(func() {
r.createLock.Lock()
defer r.createLock.Unlock()
r.isCreated = true r.isCreated = true
if r.IsDeprecated() { if r.IsDeprecated() {
r.self.initializeDeprecatedMetric() r.self.initializeDeprecatedMetric()