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package main | |
import ( | |
"fmt" | |
"os" | |
"os/signal" | |
"sync/atomic" | |
"syscall" | |
) | |
func main() { | |
fmt.Println("start") | |
fmt.Println("pid =", os.Getpid()) | |
sigs := make(chan os.Signal, 1) | |
signal.Notify(sigs, os.Interrupt, syscall.SIGINT, syscall.SIGTERM) | |
done := make(chan bool, 100) | |
var n uint64 = 0 | |
finish := func(s string) { | |
atomic.AddUint64(&n, 1) | |
fmt.Println("finish:", s, "n =", atomic.LoadUint64(&n)) | |
} | |
go func() { | |
sig := <-sigs | |
fmt.Println() | |
fmt.Println(sig) | |
finish("sig handler") | |
done <- true | |
}() | |
defer finish("defer") | |
fmt.Println("awaiting signal") | |
wait := func () { | |
fmt.Println("in wait") | |
select { | |
case <- done: | |
fmt.Println("done pulled") | |
} | |
} | |
wait() | |
fmt.Println("exiting") | |
} |
Author
ramirez7
commented
Sep 11, 2023
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