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authorJakub Kicinski <kuba@kernel.org>2024-05-15 07:29:56 -0700
committerJakub Kicinski <kuba@kernel.org>2024-05-15 07:30:49 -0700
commit621cde16e49b3ecf7d59a8106a20aaebfb4a59a9 (patch)
treebb4b8e255e276950c8d9502998f83a7f4f5bf5e9 /rust/alloc/vec/set_len_on_drop.rs
parent317a215d493230da361028ea8a4675de334bfa1a (diff)
parent1b294a1f35616977caddaddf3e9d28e576a1adbc (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.rs35
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;
- }
-}