chris
746868d720
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1.2 KiB
1.2 KiB
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).
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