diff options
author | Jakub Kicinski <kuba@kernel.org> | 2024-05-15 07:29:56 -0700 |
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committer | Jakub Kicinski <kuba@kernel.org> | 2024-05-15 07:30:49 -0700 |
commit | 621cde16e49b3ecf7d59a8106a20aaebfb4a59a9 (patch) | |
tree | bb4b8e255e276950c8d9502998f83a7f4f5bf5e9 /rust/alloc/vec/set_len_on_drop.rs | |
parent | 317a215d493230da361028ea8a4675de334bfa1a (diff) | |
parent | 1b294a1f35616977caddaddf3e9d28e576a1adbc (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Cross merge.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'rust/alloc/vec/set_len_on_drop.rs')
-rw-r--r-- | rust/alloc/vec/set_len_on_drop.rs | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/rust/alloc/vec/set_len_on_drop.rs b/rust/alloc/vec/set_len_on_drop.rs deleted file mode 100644 index d3c7297b80ec..000000000000 --- a/rust/alloc/vec/set_len_on_drop.rs +++ /dev/null @@ -1,35 +0,0 @@ -// SPDX-License-Identifier: Apache-2.0 OR MIT - -// Set the length of the vec when the `SetLenOnDrop` value goes out of scope. -// -// The idea is: The length field in SetLenOnDrop is a local variable -// that the optimizer will see does not alias with any stores through the Vec's data -// pointer. This is a workaround for alias analysis issue #32155 -pub(super) struct SetLenOnDrop<'a> { - len: &'a mut usize, - local_len: usize, -} - -impl<'a> SetLenOnDrop<'a> { - #[inline] - pub(super) fn new(len: &'a mut usize) -> Self { - SetLenOnDrop { local_len: *len, len } - } - - #[inline] - pub(super) fn increment_len(&mut self, increment: usize) { - self.local_len += increment; - } - - #[inline] - pub(super) fn current_len(&self) -> usize { - self.local_len - } -} - -impl Drop for SetLenOnDrop<'_> { - #[inline] - fn drop(&mut self) { - *self.len = self.local_len; - } -} |