Go语言:sync 模块

落落大方的发卡 · · 508 次点击 · · 开始浏览    
这是一个创建于 的文章,其中的信息可能已经有所发展或是发生改变。


type Cond struct {
    // L is held while observing or changing the condition
    L Locker
    // contains filtered or unexported fields
    func NewCond(l Locker) *Cond
    func (c *Cond) Broadcast()
    func (c *Cond) Signal()
    func (c *Cond) Wait()

type Locker interface {

type Map
    func (m *Map) Delete(key interface{})
    func (m *Map) Load(key interface{}) (value interface{}, ok bool)
    func (m *Map) LoadOrStore(key, value interface{}) (actual interface{}, loaded bool)
    func (m *Map) Range(f func(key, value interface{}) bool)
    func (m *Map) Store(key, value interface{})
type Mutex
    func (m *Mutex) Lock()
    func (m *Mutex) Unlock()
type Once
    func (o *Once) Do(f func())
type Pool
    func (p *Pool) Get() interface{}
    func (p *Pool) Put(x interface{})
type RWMutex
    func (rw *RWMutex) Lock()
    func (rw *RWMutex) RLock()
    func (rw *RWMutex) RLocker() Locker
    func (rw *RWMutex) RUnlock()
    func (rw *RWMutex) Unlock()
type WaitGroup
    func (wg *WaitGroup) Add(delta int)
    func (wg *WaitGroup) Done()
    func (wg *WaitGroup) Wait()

(来自 https://golang.org/pkg/sync

Once is an object that will perform exactly one action.

func main() {
    var once sync.Once
    onceBody := func() {
        fmt.Println("Only once")
    done := make(chan bool)
    for i := 0; i < 10; i++ {
        go func() {
            done <- true
    for i := 0; i < 10; i++ {

if once.Do(f) is called multiple times, only the first call will invoke f, even if f has a different value in each invocation. A new instance of Once is required for each function to execute.

If f panics, Do considers it to have returned; future calls of Do return without calling f.




查看原文:Go语言:sync 模块

入群交流(和以上内容无关):加入Go大咖交流群,或添加微信:liuxiaoyan-s 备注:入群;或加QQ群:692541889

508 次点击  
加入收藏 微博
添加一条新回复 (您需要 登录 后才能回复 没有账号 ?)
  • 请尽量让自己的回复能够对别人有帮助
  • 支持 Markdown 格式, **粗体**、~~删除线~~、`单行代码`
  • 支持 @ 本站用户;支持表情(输入 : 提示),见 Emoji cheat sheet
  • 图片支持拖拽、截图粘贴等方式上传