32 lines
610 B
Go
32 lines
610 B
Go
package main
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import (
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"fmt"
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"sync"
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"sync/atomic"
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)
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func main() {
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var counter int64
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var wg sync.WaitGroup
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const goroutines, increments = 10, 10000
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wg.Add(goroutines)
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for i := 0; i < goroutines; i++ {
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go func() {
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defer wg.Done()
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for j := 0; j < increments; j++ {
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for {
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old := atomic.LoadInt64(&counter)
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if atomic.CompareAndSwapInt64(&counter, old, old+1) {
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break // 成功则退出重试循环
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}
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// 失败：其他 goroutine 已修改，重试
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}
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}
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}()
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}
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wg.Wait()
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fmt.Printf("✅ 最终计数值: %d (期望: %d)\n", counter, goroutines*increments)
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}
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