43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
/*
|
|
Copyright 2014 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 uuid
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/pborman/uuid"
|
|
"k8s.io/kubernetes/pkg/types"
|
|
)
|
|
|
|
var uuidLock sync.Mutex
|
|
var lastUUID uuid.UUID
|
|
|
|
func NewUUID() types.UID {
|
|
uuidLock.Lock()
|
|
defer uuidLock.Unlock()
|
|
result := uuid.NewUUID()
|
|
// The UUID package is naive and can generate identical UUIDs if the
|
|
// time interval is quick enough.
|
|
// The UUID uses 100 ns increments so it's short enough to actively
|
|
// wait for a new value.
|
|
for uuid.Equal(lastUUID, result) == true {
|
|
result = uuid.NewUUID()
|
|
}
|
|
lastUUID = result
|
|
return types.UID(result.String())
|
|
}
|