mirror of
https://github.com/k3s-io/k3s.git
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118 lines
2.7 KiB
Go
118 lines
2.7 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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"context"
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"fmt"
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"strings"
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"sync"
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)
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const (
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tagsDelimiter = ","
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tagKeyValueDelimiter = "="
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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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func getContextWithCancel() (context.Context, context.CancelFunc) {
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return context.WithCancel(context.Background())
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}
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// ConvertTagsToMap convert the tags from string to map
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// the valid tags fomat is "key1=value1,key2=value2", which could be converted to
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// {"key1": "value1", "key2": "value2"}
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func ConvertTagsToMap(tags string) (map[string]string, error) {
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m := make(map[string]string)
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if tags == "" {
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return m, nil
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}
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s := strings.Split(tags, tagsDelimiter)
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for _, tag := range s {
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kv := strings.Split(tag, tagKeyValueDelimiter)
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if len(kv) != 2 {
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return nil, fmt.Errorf("Tags '%s' are invalid, the format should like: 'key1=value1,key2=value2'", tags)
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}
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key := strings.TrimSpace(kv[0])
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if key == "" {
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return nil, fmt.Errorf("Tags '%s' are invalid, the format should like: 'key1=value1,key2=value2'", tags)
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}
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value := strings.TrimSpace(kv[1])
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m[key] = value
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}
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return m, nil
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}
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func convertMaptoMapPointer(origin map[string]string) map[string]*string {
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newly := make(map[string]*string)
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for k, v := range origin {
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value := v
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newly[k] = &value
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}
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return newly
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}
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