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Move thread state checks out of generic methods to reduce generated code duplication.

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This commit is contained in:
Josh Matthews 2020-06-04 13:09:50 -04:00
parent 6dc4488bc7
commit ec0b5d55d7
2 changed files with 41 additions and 33 deletions
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62
components/script/dom/bindings/root.rs
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@ -64,7 +64,7 @@ where
#[allow(unrooted_must_root)]
pub unsafe fn new(value: T) -> Self {
unsafe fn add_to_root_list(object: *const dyn JSTraceable) -> *const RootCollection {
debug_assert!(thread_state::get().is_script());
assert_in_script();
STACK_ROOTS.with(|ref root_list| {
let root_list = &*root_list.get().unwrap();
root_list.root(object);
@ -137,7 +137,7 @@ where
type Target = <T as Deref>::Target;
fn deref(&self) -> &Self::Target {
debug_assert!(thread_state::get().is_script());
assert_in_script();
&self.value
}
}
@ -251,7 +251,7 @@ impl<'a> Drop for ThreadLocalStackRoots<'a> {
impl RootCollection {
/// Create an empty collection of roots
pub fn new() -> RootCollection {
debug_assert!(thread_state::get().is_script());
assert_in_script();
RootCollection {
roots: UnsafeCell::new(vec![]),
}
@ -259,13 +259,13 @@ impl RootCollection {
/// Starts tracking a trace object.
unsafe fn root(&self, object: *const dyn JSTraceable) {
debug_assert!(thread_state::get().is_script());
assert_in_script();
(*self.roots.get()).push(object);
}
/// Stops tracking a trace object, asserting if it isn't found.
unsafe fn unroot(&self, object: *const dyn JSTraceable) {
debug_assert!(thread_state::get().is_script());
assert_in_script();
let roots = &mut *self.roots.get();
match roots
.iter()
@ -333,7 +333,7 @@ impl<T> MallocSizeOf for Dom<T> {
impl<T> Dom<T> {
/// Returns `LayoutDom<T>` containing the same pointer.
pub unsafe fn to_layout(&self) -> LayoutDom<T> {
debug_assert!(thread_state::get().is_layout());
assert_in_layout();
LayoutDom {
value: self.ptr.as_ref(),
}
@ -344,7 +344,7 @@ impl<T: DomObject> Dom<T> {
/// Create a Dom<T> from a &T
#[allow(unrooted_must_root)]
pub fn from_ref(obj: &T) -> Dom<T> {
debug_assert!(thread_state::get().is_script());
assert_in_script();
Dom {
ptr: ptr::NonNull::from(obj),
}
@ -355,7 +355,7 @@ impl<T: DomObject> Deref for Dom<T> {
type Target = T;
fn deref(&self) -> &T {
debug_assert!(thread_state::get().is_script());
assert_in_script();
// We can only have &Dom<T> from a rooted thing, so it's safe to deref
// it to &T.
unsafe { &*self.ptr.as_ptr() }
@ -432,7 +432,7 @@ where
U: Castable,
T: DerivedFrom<U>,
{
debug_assert!(thread_state::get().is_layout());
assert_in_layout();
LayoutDom {
value: self.value.upcast::<U>(),
}
@ -443,7 +443,7 @@ where
where
U: DerivedFrom<T>,
{
debug_assert!(thread_state::get().is_layout());
assert_in_layout();
self.value.downcast::<U>().map(|value| LayoutDom { value })
}
@ -452,7 +452,7 @@ where
where
U: DerivedFrom<T>,
{
debug_assert!(thread_state::get().is_layout());
assert_in_layout();
self.value.is::<U>()
}
}
@ -463,7 +463,7 @@ where
{
/// Get the reflector.
pub unsafe fn get_jsobject(&self) -> *mut JSObject {
debug_assert!(thread_state::get().is_layout());
assert_in_layout();
self.value.reflector().get_jsobject().get()
}
}
@ -508,7 +508,7 @@ impl<T> Clone for Dom<T> {
#[inline]
#[allow(unrooted_must_root)]
fn clone(&self) -> Self {
debug_assert!(thread_state::get().is_script());
assert_in_script();
Dom {
ptr: self.ptr.clone(),
}
@ -518,7 +518,7 @@ impl<T> Clone for Dom<T> {
impl<T> Clone for LayoutDom<'_, T> {
#[inline]
fn clone(&self) -> Self {
debug_assert!(thread_state::get().is_layout());
assert_in_layout();
LayoutDom { value: self.value }
}
}
@ -527,7 +527,7 @@ impl LayoutDom<'_, Node> {
/// Create a new JS-owned value wrapped from an address known to be a
/// `Node` pointer.
pub unsafe fn from_trusted_node_address(inner: TrustedNodeAddress) -> Self {
debug_assert!(thread_state::get().is_layout());
assert_in_layout();
let TrustedNodeAddress(addr) = inner;
LayoutDom {
value: &*(addr as *const Node),
@ -549,7 +549,7 @@ pub struct MutDom<T: DomObject> {
impl<T: DomObject> MutDom<T> {
/// Create a new `MutDom`.
pub fn new(initial: &T) -> MutDom<T> {
debug_assert!(thread_state::get().is_script());
assert_in_script();
MutDom {
val: UnsafeCell::new(Dom::from_ref(initial)),
}
@ -557,7 +557,7 @@ impl<T: DomObject> MutDom<T> {
/// Set this `MutDom` to the given value.
pub fn set(&self, val: &T) {
debug_assert!(thread_state::get().is_script());
assert_in_script();
unsafe {
*self.val.get() = Dom::from_ref(val);
}
@ -565,7 +565,7 @@ impl<T: DomObject> MutDom<T> {
/// Get the value in this `MutDom`.
pub fn get(&self) -> DomRoot<T> {
debug_assert!(thread_state::get().is_script());
assert_in_script();
unsafe { DomRoot::from_ref(&*ptr::read(self.val.get())) }
}
}
@ -589,6 +589,14 @@ impl<T: DomObject + PartialEq> PartialEq<T> for MutDom<T> {
}
}
pub(crate) fn assert_in_script() {
debug_assert!(thread_state::get().is_script());
}
pub(crate) fn assert_in_layout() {
debug_assert!(thread_state::get().is_layout());
}
/// A holder that provides interior mutability for GC-managed values such as
/// `Dom<T>`, with nullability represented by an enclosing Option wrapper.
/// Essentially a `Cell<Option<Dom<T>>>`, but safer.
@ -604,7 +612,7 @@ pub struct MutNullableDom<T: DomObject> {
impl<T: DomObject> MutNullableDom<T> {
/// Create a new `MutNullableDom`.
pub fn new(initial: Option<&T>) -> MutNullableDom<T> {
debug_assert!(thread_state::get().is_script());
assert_in_script();
MutNullableDom {
ptr: UnsafeCell::new(initial.map(Dom::from_ref)),
}
@ -616,7 +624,7 @@ impl<T: DomObject> MutNullableDom<T> {
where
F: FnOnce() -> DomRoot<T>,
{
debug_assert!(thread_state::get().is_script());
assert_in_script();
match self.get() {
Some(inner) => inner,
None => {
@ -631,20 +639,20 @@ impl<T: DomObject> MutNullableDom<T> {
/// For use by layout, which can't use safe types like Temporary.
#[allow(unrooted_must_root)]
pub unsafe fn get_inner_as_layout(&self) -> Option<LayoutDom<T>> {
debug_assert!(thread_state::get().is_layout());
assert_in_layout();
(*self.ptr.get()).as_ref().map(|js| js.to_layout())
}
/// Get a rooted value out of this object
#[allow(unrooted_must_root)]
pub fn get(&self) -> Option<DomRoot<T>> {
debug_assert!(thread_state::get().is_script());
assert_in_script();
unsafe { ptr::read(self.ptr.get()).map(|o| DomRoot::from_ref(&*o)) }
}
/// Set this `MutNullableDom` to the given value.
pub fn set(&self, val: Option<&T>) {
debug_assert!(thread_state::get().is_script());
assert_in_script();
unsafe {
*self.ptr.get() = val.map(|p| Dom::from_ref(p));
}
@ -673,7 +681,7 @@ impl<'a, T: DomObject> PartialEq<Option<&'a T>> for MutNullableDom<T> {
impl<T: DomObject> Default for MutNullableDom<T> {
#[allow(unrooted_must_root)]
fn default() -> MutNullableDom<T> {
debug_assert!(thread_state::get().is_script());
assert_in_script();
MutNullableDom {
ptr: UnsafeCell::new(None),
}
@ -709,7 +717,7 @@ where
where
F: FnOnce() -> DomRoot<T>,
{
debug_assert!(thread_state::get().is_script());
assert_in_script();
&self.ptr.init_once(|| Dom::from_ref(&cb()))
}
}
@ -717,7 +725,7 @@ where
impl<T: DomObject> Default for DomOnceCell<T> {
#[allow(unrooted_must_root)]
fn default() -> DomOnceCell<T> {
debug_assert!(thread_state::get().is_script());
assert_in_script();
DomOnceCell {
ptr: OnceCell::new(),
}
@ -747,7 +755,7 @@ where
/// Returns a reference to the interior of this JS object. The fact
/// that this is unsafe is what necessitates the layout wrappers.
pub unsafe fn unsafe_get(self) -> &'dom T {
debug_assert!(thread_state::get().is_layout());
assert_in_layout();
self.value
}