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feat: add get_backing_store to ArrayBufferView (#1342)

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Matt Mastracci 2023-10-03 09:23:59 -06:00 committed by GitHub
parent efca1408f6
commit da5ca4f2d1
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2 changed files with 16 additions and 0 deletions
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12
src/array_buffer_view.rs
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@ -4,8 +4,10 @@ use std::ffi::c_void;
use crate::support::int;
use crate::ArrayBuffer;
use crate::ArrayBufferView;
use crate::BackingStore;
use crate::HandleScope;
use crate::Local;
use crate::SharedRef;
extern "C" {
fn v8__ArrayBufferView__Buffer(
@ -33,6 +35,16 @@ impl ArrayBufferView {
unsafe { scope.cast_local(|_| v8__ArrayBufferView__Buffer(self)) }
}
/// Get a shared pointer to the backing store of this array buffer. This
/// pointer coordinates the lifetime management of the internal storage
/// with any live ArrayBuffers on the heap, even across isolates. The embedder
/// should not attempt to manage lifetime of the storage through other means.
#[inline(always)]
pub fn get_backing_store(&self) -> Option<SharedRef<BackingStore>> {
let buffer = unsafe { v8__ArrayBufferView__Buffer(self) };
unsafe { buffer.as_ref().map(|buffer| buffer.get_backing_store()) }
}
/// Returns the underlying storage for this `ArrayBufferView`, including the built-in `byte_offset`.
/// This is a more efficient way of calling `buffer(scope)->data()`, and may be called without a
/// scope.

4
tests/test_api.rs
View file

@ -5094,6 +5094,10 @@ fn array_buffer_view() {
assert!(maybe_ab.is_some());
let ab = maybe_ab.unwrap();
assert_eq!(ab.byte_length(), 6);
assert_eq!(
result.get_backing_store().unwrap().data(),
ab.get_backing_store().data()
);
}
}