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https://github.com/k3s-io/k3s.git
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93 lines
2.2 KiB
Go
93 lines
2.2 KiB
Go
// +build !providerless
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/*
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Copyright 2019 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package azure
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import (
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"sync"
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"time"
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utilerrors "k8s.io/apimachinery/pkg/util/errors"
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)
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// lockMap used to lock on entries
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type lockMap struct {
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sync.Mutex
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mutexMap map[string]*sync.Mutex
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}
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// NewLockMap returns a new lock map
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func newLockMap() *lockMap {
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return &lockMap{
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mutexMap: make(map[string]*sync.Mutex),
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}
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}
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// LockEntry acquires a lock associated with the specific entry
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func (lm *lockMap) LockEntry(entry string) {
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lm.Lock()
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// check if entry does not exists, then add entry
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if _, exists := lm.mutexMap[entry]; !exists {
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lm.addEntry(entry)
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}
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lm.Unlock()
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lm.lockEntry(entry)
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}
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// UnlockEntry release the lock associated with the specific entry
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func (lm *lockMap) UnlockEntry(entry string) {
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lm.Lock()
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defer lm.Unlock()
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if _, exists := lm.mutexMap[entry]; !exists {
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return
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}
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lm.unlockEntry(entry)
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}
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func (lm *lockMap) addEntry(entry string) {
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lm.mutexMap[entry] = &sync.Mutex{}
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}
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func (lm *lockMap) lockEntry(entry string) {
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lm.mutexMap[entry].Lock()
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}
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func (lm *lockMap) unlockEntry(entry string) {
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lm.mutexMap[entry].Unlock()
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}
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// aggregateGoroutinesWithDelay aggregates goroutines and runs them
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// in parallel with delay before starting each goroutine
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func aggregateGoroutinesWithDelay(delay time.Duration, funcs ...func() error) utilerrors.Aggregate {
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errChan := make(chan error, len(funcs))
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for _, f := range funcs {
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go func(f func() error) { errChan <- f() }(f)
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time.Sleep(delay)
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}
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errs := make([]error, 0)
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for i := 0; i < cap(errChan); i++ {
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if err := <-errChan; err != nil {
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errs = append(errs, err)
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}
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}
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return utilerrors.NewAggregate(errs)
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}
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