memory-pager

Access memory using small fixed sized buffers instead of allocating a huge buffer. Useful if you are implementing sparse data structures (such as large bitfield).

travis

npm install memory-pager

Usage

var pager = require('paged-memory')

var pages = pager(1024) // use 1kb per page

var page = pages.get(10) // get page #10

console.log(page.offset) // 10240
console.log(page.buffer) // a blank 1kb buffer

API

`var pages = pager(pageSize)`

Create a new pager. pageSize defaults to 1024.

`var page = pages.get(pageNumber, [noAllocate])`

Get a page. The page will be allocated at first access.

Optionally you can set the noAllocate flag which will make the method return undefined if no page has been allocated already

A page looks like this

{
  offset: byteOffset,
  buffer: bufferWithPageSize
}

`pages.set(pageNumber, buffer)`

Explicitly set the buffer for a page.

`pages.updated(page)`

Mark a page as updated.

`pages.lastUpdate()`

Get the last page that was updated.

`var buf = pages.toBuffer()`

Concat all pages allocated pages into a single buffer

License

MIT

Current Tags

1.5.0 ... latest (6 years ago)

memory-pager

Usage

API

var pages = pager(pageSize)

var page = pages.get(pageNumber, [noAllocate])

pages.set(pageNumber, buffer)

pages.updated(page)

pages.lastUpdate()

var buf = pages.toBuffer()