初始化Go学习项目

go-atomic-cpu/atomic_counter.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+	"sync/atomic"
+)
+
+func main() {
+	var wg sync.WaitGroup
+	var counter int64 // 注意必须是 int64/uint64 等特定类型
+
+	for i := 0; i < 1000; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for j := 0; j < 1000; j++ {
+				atomic.AddInt64(&counter, 1)
+			}
+		}()
+	}
+
+	wg.Wait()
+	fmt.Println("期待的结果:", 1000*1000)
+	fmt.Println("实际结果:", counter)
+}