一文带你搞懂Golang如何正确退出Goroutine

package main
import (
	"fmt"
	"time"
)
func main() {
	go func() {
		// Goroutine 中的函数执行完毕后自动退出
		fmt.Println("Goroutine execution complete")
	}()
	// 主 Goroutine 继续执行其他任务
	time.Sleep(time.Second)
	fmt.Println("Main Goroutine execution complete")
}

package main
import (
	"fmt"
	"time"
)
func main() {
	go func() {
		// Goroutine 中使用 return 语句显式退出
		fmt.Println("Goroutine execution")
		return
	}()
	// 主 Goroutine 继续执行其他任务
	time.Sleep(time.Second)
	fmt.Println("Main Goroutine execution complete")
}

package main
import (
	"fmt"
	"runtime"
	"time"
)
func main() {
	go func() {
		// 使用 runtime.Goexit() 终止当前 Goroutine 的执行
		fmt.Println("Goroutine execution before Goexit")
		runtime.Goexit()
		fmt.Println("Goroutine execution after Goexit") // 不会执行到这里
	}()
	// 主 Goroutine 继续执行其他任务
	time.Sleep(time.Second)
	fmt.Println("Main Goroutine execution complete")
}

package main
import (
	"fmt"
	"time"
)
func main() {
	go func() {
		defer func() {
			if err := recover(); err != nil {
				// 在 Goroutine 中捕获并处理恐慌
				fmt.Println("Recovered from panic:", err)
			}
		}()
		// 引发恐慌
		panic("Goroutine panic")
	}()
	// 主 Goroutine 继续执行其他任务
	time.Sleep(time.Second)
	fmt.Println("Main Goroutine execution complete")
}

package main
import (
	"context"
	"fmt"
	"time"
)
func worker(ctx context.Context) {
	for {
		select {
		case <-ctx.Done():
			// 接收到取消信号后退出 Goroutine
			fmt.Println("Goroutine execution canceled")
			return
		default:
			// 执行正常任务
			fmt.Println("Goroutine executing...")
			time.Sleep(time.Second)
		}
	}
}
func main() {
	ctx, cancel := context.WithCancel(context.Background())
	go worker(ctx)
	// 模拟取消任务
	time.Sleep(3 * time.Second)
	cancel()
	// 主 Goroutine 继续执行其他任务
	time.Sleep(time.Second)
	fmt.Println("Main Goroutine execution complete")
}