Common errors and traps in golang function concurrency control

并发错误和陷阱：错误1：Data conflict: In many cases, the same number of cases can be modified at the same time. Keyword 2: Deadlock: More than one example of mutual waiting, unlimited blockage.错误3: Channel misuse: prematurely closing a channel or reading from a closed channel. Workaround: Use synchronization mechanisms (mutexes, channels, etc.) to control access to shared data. Reduce the risk of contention and deadlock by carefully considering data structures and concurrency patterns. Use the Conflict Detector tool. Test concurrent code to ensure proper behavior.

Go verb function number 并发控制中的次へ见错误以陷阱

并发控制对于控并行执行的Go 语言例程到Important. However, it is possible to organize a group, and to introduce various types of groups. After reading the text, go to the most common view of the function control system.

Context 1: Number competition

Description:The number of cases can be reached at the same time when the number is set. This is a dispute over the number of titles.

Practical example:

var count int64

func incrementCounter() {
    count++
}

func main() {
    var wg sync.WaitGroup
    wg.Add(100)
    
    for i := 0; i < 100; i++ {
        go func() {
            incrementCounter()
            wg.Done()
        }()
    }

    wg.Wait()
    fmt.Println(count)
}

In the above example, multiple examples can be used incrementCounter Number of functions, modifications can be enjoyed together count . The number of possible initiatives will remain unchanged, and the final result will be uncertain.

错误 2: Death Lock

Description: In this case, in some cases, there is no mutual standby when the place is blocked, and the death lock is used.

Practical example:

var m sync.Mutex
var rw sync.RWMutex

func read() {
    rw.RLock()
    defer rw.RUnlock()
    m.Lock()
    defer m.Unlock()
}

func write() {
    m.Lock()
    defer m.Unlock()
    rw.Lock()
    defer rw.Unlock()
}

In the above example, read 和 write Function capital is tested separately. Reciprocal lock. It is possible to get a lethal lock, because one example can get the first one, but the first one can wait, and the second one can get the second one, but the first one can wait.

Call 3：Channel Use

Description：Go to talk to the user using the channel in a safe location during the program. If you use a channel, it is possible to introduce a program that can lead to a failure or an unexpected behavior.

Actual plan example:

func main() {
    ch := make(chan int)
    go func() {
        ch <- 1
    }()

    close(ch) // 过早关闭 channel
    <-ch      // 尝试从关闭的 channel 中读取
}

In the above example, close(ch) 过过地关闭了新道，This meeting was blocked copying Send the message to Nobu Michiru. Afterwards, the order to lead the Shindo training session was discontinued.

Escape from the best practices

Escape from the world is important, it's important to know how to proceed. Here is the best practice:

• Use the same original language, how to switch channels, and how to use the same number of channels.
• # Children think number 结构 结构 结构 结构 结构 结构 结构 结构 结构 结构 减 减 减 减 减 减 减 减 ， 减 减 减 减 减 减
• Tools used, as in the Go language introductory game equipment, come to help us with this question.
• Ensure that your conduct is correct.

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