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3d320fa96a
* Use 2024 style edition Signed-off-by: Simon Wülker <simon.wuelker@arcor.de> * Reformat all code Signed-off-by: Simon Wülker <simon.wuelker@arcor.de> --------- Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
52 lines
1.7 KiB
Rust
52 lines
1.7 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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//! Generic finalizer implementations for DOM binding implementations.
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use std::any::type_name;
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use std::mem;
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use js::glue::JS_GetReservedSlot;
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use js::jsapi::JSObject;
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use js::jsval::UndefinedValue;
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use crate::dom::bindings::utils::finalize_global as do_finalize_global;
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use crate::dom::bindings::weakref::{DOM_WEAK_SLOT, WeakBox, WeakReferenceable};
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pub(crate) unsafe fn finalize_common<T>(this: *const T) {
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if !this.is_null() {
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// The pointer can be null if the object is the unforgeable holder of that interface.
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let _ = Box::from_raw(this as *mut T);
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}
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debug!("{} finalize: {:p}", type_name::<T>(), this);
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}
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pub(crate) unsafe fn finalize_global<T>(obj: *mut JSObject, this: *const T) {
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do_finalize_global(obj);
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finalize_common::<T>(this);
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}
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pub(crate) unsafe fn finalize_weak_referenceable<T: WeakReferenceable>(
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obj: *mut JSObject,
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this: *const T,
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) {
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let mut slot = UndefinedValue();
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JS_GetReservedSlot(obj, DOM_WEAK_SLOT, &mut slot);
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let weak_box_ptr = slot.to_private() as *mut WeakBox<T>;
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if !weak_box_ptr.is_null() {
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let count = {
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let weak_box = &*weak_box_ptr;
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assert!(weak_box.value.get().is_some());
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assert!(weak_box.count.get() > 0);
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weak_box.value.set(None);
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let count = weak_box.count.get() - 1;
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weak_box.count.set(count);
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count
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};
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if count == 0 {
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mem::drop(Box::from_raw(weak_box_ptr));
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}
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}
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finalize_common::<T>(this);
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}
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