mirror of
https://github.com/denoland/deno.git
synced 2024-11-23 15:16:54 -05:00
23 lines
707 B
Rust
23 lines
707 B
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
|
|
|
|
use deno_runtime::deno_napi::*;
|
|
use std::cell::Cell;
|
|
|
|
unsafe fn get_backing_store_slice(
|
|
backing_store: &mut v8::SharedRef<v8::BackingStore>,
|
|
byte_offset: usize,
|
|
byte_length: usize,
|
|
) -> &mut [u8] {
|
|
let cells: *const [Cell<u8>] =
|
|
&backing_store[byte_offset..byte_offset + byte_length];
|
|
let mut bytes = cells as *mut [u8];
|
|
&mut *bytes
|
|
}
|
|
|
|
pub fn get_array_buffer_ptr(ab: v8::Local<v8::ArrayBuffer>) -> *mut u8 {
|
|
let mut backing_store = ab.get_backing_store();
|
|
let byte_length = ab.byte_length();
|
|
let mut slice =
|
|
unsafe { get_backing_store_slice(&mut backing_store, 0, byte_length) };
|
|
slice.as_mut_ptr()
|
|
}
|