advanced-go-programming-book/examples/ch3.8/ch3.8-5/main.go

package main

import (
	"reflect"
	"time"
)

func getg() interface{}

type eface struct {
	_type, elem uintptr
}

//go:nosplit
func runtime_convT2E_hack(_type, elem uintptr) eface {
	return eface{
		_type: _type,
		elem:  elem,
	}
}

func GetGoid() int64 {
	g := getg()
	goid := reflect.ValueOf(g).FieldByName("goid").Int()
	return goid
}
func main() {
	println("a:", GetGoid())
	go func() {
		println("b:", GetGoid())
	}()

	time.Sleep(time.Second)
}