execute a callback(via function ptr) from dll

Question

I got a callback from a dll, the function ptr type defined:

typedef int32_t (WINAPI *fn) ();

if I use cgo, we can do like this:

/*
#include <windows.h>
#include <stdint.h>

typedef int32_t (WINAPI *fn) ();

int32_t call_callback(fn f){
   f();
}
*/
import "C"
import (
    "unsafe"
)

func main() {

    var callBackPtr uintptr // from dll function

    C.call_callback((C.fn)(unsafe.Pointer(callBackPtr)))

}

BUT! I don't want to use cgo. How can I achieve in pure go?

Answer 1

just

   syscall.SyscallN(callBackPtr, [callBack's arg])

....