Mmap-go

package main

import (
        "fmt"
        "os"
        "syscall"
        "unsafe"
        "github.com/edsrzf/mmap-go"
        )

func main() {
        n := 1000
        t := int(unsafe.Sizeof(0)) * n

        map_file, _ := os.Create("/tmp/test.dat")
        _, _ = map_file.Seek(int64(t - 1), 0)
        map_file.Write([]byte(" "))

        /*mmap, _ := syscall.Mmap(map_file.Fd(), 0, int(t), syscall.PROT_READ | syscall.PROT_WRITE, syscall.MAP_SHARED)*/
        mmap, _ := mmap.Map(map_file, syscall.PROT_NONE, mmap.RDWR)
        map_array := (*[1000]int)(unsafe.Pointer(&mmap))

        for i:=0; i < n; i++ {
                map_array[i] = i*i
        }

        fmt.Println(*map_array)
}