| // Copyright 2011 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // This package is a lightly modified version of the mmap code |
| // in github.com/google/codesearch/index. |
| |
| // The mmap package provides an abstraction for memory mapping files |
| // on different platforms. |
| package mmap |
| |
| import ( |
| "os" |
| ) |
| |
| // Data is mmap'ed read-only data from a file. |
| // The backing file is never closed, so Data |
| // remains valid for the lifetime of the process. |
| type Data struct { |
| f *os.File |
| Data []byte |
| } |
| |
| // Mmap maps the given file into memory. |
| func Mmap(file string) (Data, error) { |
| f, err := os.Open(file) |
| if err != nil { |
| return Data{}, err |
| } |
| return mmapFile(f) |
| } |