例如，修改示例程序，
package mainimport ( "fmt" "os" "syscall" "unsafe")func main() { const n = 1e3 t := int(unsafe.Sizeof(0)) * n map_file, err := os.Create("/tmp/test.dat") if err != nil { fmt.Println(err) os.Exit(1) } _, err = map_file.Seek(int64(t-1), 0) if err != nil { fmt.Println(err) os.Exit(1) } _, err = map_file.Write([]byte(" ")) if err != nil { fmt.Println(err) os.Exit(1) } mmap, err := syscall.Mmap(int(map_file.Fd()), 0, int(t), syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_SHARED) if err != nil { fmt.Println(err) os.Exit(1) } map_array := (*[n]int)(unsafe.Pointer(&mmap[0])) for i := 0; i < n; i++ { map_array[i] = i * i } fmt.Println(*map_array) err = syscall.Munmap(mmap) if err != nil { fmt.Println(err) os.Exit(1) } err = map_file.Close() if err != nil { fmt.Println(err) os.Exit(1) }}
