mmap

Package mmap provides a way to memory-map a file.

Get started

Install

go get github.com/hslam/mmap

Import

import "github.com/hslam/mmap"

Usage

Example

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]))
	}
}

Output

Hello world

License

This package is licensed under a MIT license (Copyright (c) 2020 Meng Huang)

Author

mmap was written by Meng Huang.