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style: ThinArc should use NonNull.

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If only for parallelism with Arc<>.

Differential Revision: https://phabricator.services.mozilla.com/D30131
This commit is contained in:
Emilio Cobos Álvarez 2019-05-07 03:16:21 +00:00
parent b1b47d8046
commit 1fba297bbc
1 changed files with 9 additions and 7 deletions
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16
components/servo_arc/lib.rs
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@ -21,7 +21,7 @@
//!
//! [1]: https://bugzilla.mozilla.org/show_bug.cgi?id=1360883
// The semantics of `Arc` are alread documented in the Rust docs, so we don't
// The semantics of `Arc` are already documented in the Rust docs, so we don't
// duplicate those here.
#![allow(missing_docs)]
@ -767,7 +767,7 @@ type HeaderSliceWithLength<H, T> = HeaderSlice<HeaderWithLength<H>, T>;
/// via `HeaderSliceWithLength`.
#[repr(C)]
pub struct ThinArc<H, T> {
ptr: *mut ArcInner<HeaderSliceWithLength<H, [T; 1]>>,
ptr: ptr::NonNull<ArcInner<HeaderSliceWithLength<H, [T; 1]>>>,
}
unsafe impl<H: Sync + Send, T: Sync + Send> Send for ThinArc<H, T> {}
@ -796,7 +796,7 @@ impl<H, T> ThinArc<H, T> {
// Synthesize transient Arc, which never touches the refcount of the ArcInner.
let transient = unsafe {
NoDrop::new(Arc {
p: ptr::NonNull::new_unchecked(thin_to_thick(self.ptr)),
p: ptr::NonNull::new_unchecked(thin_to_thick(self.ptr.as_ptr())),
})
};
@ -851,7 +851,7 @@ impl<H, T> ThinArc<H, T> {
if is_static {
ptr::null()
} else {
self.ptr as *const ArcInner<T> as *const c_void
self.ptr.as_ptr() as *const ArcInner<T> as *const c_void
}
}
}
@ -861,7 +861,7 @@ impl<H, T> Deref for ThinArc<H, T> {
#[inline]
fn deref(&self) -> &Self::Target {
unsafe { &(*thin_to_thick(self.ptr)).data }
unsafe { &(*thin_to_thick(self.ptr.as_ptr())).data }
}
}
@ -893,7 +893,9 @@ impl<H, T> Arc<HeaderSliceWithLength<H, [T]>> {
mem::forget(a);
let thin_ptr = fat_ptr as *mut [usize] as *mut usize;
ThinArc {
ptr: thin_ptr as *mut ArcInner<HeaderSliceWithLength<H, [T; 1]>>,
ptr: unsafe {
ptr::NonNull::new_unchecked(thin_ptr as *mut ArcInner<HeaderSliceWithLength<H, [T; 1]>>)
},
}
}
@ -901,7 +903,7 @@ impl<H, T> Arc<HeaderSliceWithLength<H, [T]>> {
/// is not modified.
#[inline]
pub fn from_thin(a: ThinArc<H, T>) -> Self {
let ptr = thin_to_thick(a.ptr);
let ptr = thin_to_thick(a.ptr.as_ptr());
mem::forget(a);
unsafe {
Arc {