package main import ( "fmt" "github.com/hslam/mmap" "os" ) func main() { name := "mmap" file, err := os.Create(name) if err != nil { panic(err)	} defer os.Remove(name) defer file.Close() str := "Hello world" file.Truncate(int64(len(str))) b, err := mmap.Open(int(file.Fd()), 0, len(str), mmap.READ|mmap.WRITE) if err != nil { panic(err)	} defer mmap.Munmap(b) copy(b, []byte(str)) mmap.Msync(b) buf := make([]byte, len(str)) if n, err := file.Read(buf); err != nil { fmt.Println(err)	} else { fmt.Println(string(buf[:n]))	} }