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This commit is contained in:
Zachary S 2024-05-19 13:21:53 -05:00
parent 2dacd70e1e
commit 6fae171e54
1 changed files with 6 additions and 5 deletions
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11
library/alloc/src/sync.rs
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@ -2476,7 +2476,6 @@ unsafe impl<#[may_dangle] T: ?Sized, A: Allocator> Drop for Arc<T, A> {
Likely decrement_strong_count or from_raw were called too many times.",
);
unsafe {
self.drop_slow();
}
@ -3339,7 +3338,6 @@ static STATIC_INNER_SLICE: SliceArcInnerForStatic = SliceArcInnerForStatic {
},
};
#[cfg(not(no_global_oom_handling))]
#[stable(feature = "more_rc_default_impls", since = "CURRENT_RUSTC_VERSION")]
impl Default for Arc<str> {
@ -3365,9 +3363,11 @@ impl Default for Arc<core::ffi::CStr> {
fn default() -> Self {
use core::ffi::CStr;
let inner: NonNull<ArcInner<[u8]>> = NonNull::from(&STATIC_INNER_SLICE.inner);
let inner: NonNull<ArcInner<CStr>> = NonNull::new(inner.as_ptr() as *mut ArcInner<CStr>).unwrap();
let inner: NonNull<ArcInner<CStr>> =
NonNull::new(inner.as_ptr() as *mut ArcInner<CStr>).unwrap();
// `this` semantically is the Arc "owned" by the static, so make sure not to drop it.
let this: mem::ManuallyDrop<Arc<CStr>> = unsafe { mem::ManuallyDrop::new(Arc::from_inner(inner)) };
let this: mem::ManuallyDrop<Arc<CStr>> =
unsafe { mem::ManuallyDrop::new(Arc::from_inner(inner)) };
(*this).clone()
}
}
@ -3388,7 +3388,8 @@ impl<T> Default for Arc<[T]> {
let inner: NonNull<SliceArcInnerForStatic> = NonNull::from(&STATIC_INNER_SLICE);
let inner: NonNull<ArcInner<[T; 0]>> = inner.cast();
// `this` semantically is the Arc "owned" by the static, so make sure not to drop it.
let this: mem::ManuallyDrop<Arc<[T; 0]>> = unsafe { mem::ManuallyDrop::new(Arc::from_inner(inner)) };
let this: mem::ManuallyDrop<Arc<[T; 0]>> =
unsafe { mem::ManuallyDrop::new(Arc::from_inner(inner)) };
return (*this).clone();
}