mirage/mirage-block-ramdisk

Name: mirage-block-ramdisk

Owner: MirageOS

Description: A simple in-memory BLOCK device

Created: 2015-11-03 12:06:51.0

Updated: 2016-11-28 19:01:59.0

Pushed: 2017-11-25 03:31:17.0

Homepage: null

Size: 33

Language: OCaml

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README

mirage-block-ramdisk

A simple in-memory BLOCK device.

Please see the API documentation.

Features

• Can be dynamically resized
• Supports querying sparseness information

Example usage

In a top-level like utop:

equire "io-page.unix";;
equire "mirage-block";;
equire "mirage-block-ramdisk";;
equire "lwt.syntax";;

t t_or_error = Ramdisk.create ~name:"hello" ~size_sectors:1024L ~sector_size:512;;
t_or_error : [ `Error of Ramdisk.error | `Ok of Ramdisk.t ] = `Ok <abstr>

t t = Mirage_block.Error.ok_exn t_or_error;;
t : Ramdisk.t = <abstr>

t page = Io_page.(to_cstruct (get 1));;
page : Ramdisk.page_aligned_buffer =
struct.buffer = <abstr>; off = 0; len = 4096}

t result_or_error = Ramdisk.read t 0L [ page ];;
result_or_error : [ `Error of Ramdisk.error | `Ok of unit ] = `Ok ()