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fixing an incredible edge case

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this basically only happens if the Vc oscilates between 7 and 8 elemenst

Signed-off-by: Jakub Doka <jakub.doka2@gmail.com>
This commit is contained in:
Jakub Doka 2024-12-16 14:27:23 +01:00
parent a1e692eac7
commit 04680c8b7c
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GPG key ID: C6E9A89936B8C143
1 changed files with 14 additions and 13 deletions
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27
lang/src/utils.rs
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@ -381,25 +381,26 @@ impl Vc {
} }
pub fn push(&mut self, value: Nid) { pub fn push(&mut self, value: Nid) {
if let Some(layout) = self.layout() if let Some(layout) = self.layout() {
&& unsafe { self.alloced.len == self.alloced.cap } if unsafe { self.alloced.len == self.alloced.cap } {
{ unsafe {
unsafe { self.alloced.cap *= 2;
self.alloced.cap *= 2; self.alloced.base = Unique::new_unchecked(
self.alloced.base = Unique::new_unchecked( alloc::realloc(
alloc::realloc( self.alloced.base.as_ptr().cast(),
self.alloced.base.as_ptr().cast(), layout,
layout, self.alloced.cap as usize * core::mem::size_of::<Nid>(),
self.alloced.cap as usize * core::mem::size_of::<Nid>(), )
) .cast(),
.cast(), );
); }
} }
} else if self.len() == INLINE_ELEMS { } else if self.len() == INLINE_ELEMS {
unsafe { unsafe {
let mut allcd = let mut allcd =
Self::alloc((self.inline.cap + 1).next_power_of_two() as _, self.len()); Self::alloc((self.inline.cap + 1).next_power_of_two() as _, self.len());
core::ptr::copy_nonoverlapping(self.as_ptr(), allcd.as_mut_ptr(), self.len()); core::ptr::copy_nonoverlapping(self.as_ptr(), allcd.as_mut_ptr(), self.len());
debug_assert!(!allcd.is_inline());
*self = allcd; *self = allcd;
} }
} }