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24 lines
707 B
Rust
24 lines
707 B
Rust
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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use deno_runtime::deno_napi::*;
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use std::cell::Cell;
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unsafe fn get_backing_store_slice(
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backing_store: &mut v8::SharedRef<v8::BackingStore>,
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byte_offset: usize,
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byte_length: usize,
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) -> &mut [u8] {
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let cells: *const [Cell<u8>] =
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&backing_store[byte_offset..byte_offset + byte_length];
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let mut bytes = cells as *mut [u8];
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&mut *bytes
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}
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pub fn get_array_buffer_ptr(ab: v8::Local<v8::ArrayBuffer>) -> *mut u8 {
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let mut backing_store = ab.get_backing_store();
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let byte_length = ab.byte_length();
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let mut slice =
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unsafe { get_backing_store_slice(&mut backing_store, 0, byte_length) };
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slice.as_mut_ptr()
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}
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