From 8cdfa445d6629ffef4cb84967ff7017654045bc2 Mon Sep 17 00:00:00 2001 From: mo khan Date: Wed, 2 Jul 2025 18:36:06 -0600 Subject: chore: add vendor directory --- vendor/windows-strings/src/ref_count.rs | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 vendor/windows-strings/src/ref_count.rs (limited to 'vendor/windows-strings/src/ref_count.rs') diff --git a/vendor/windows-strings/src/ref_count.rs b/vendor/windows-strings/src/ref_count.rs new file mode 100644 index 00000000..c6309f9f --- /dev/null +++ b/vendor/windows-strings/src/ref_count.rs @@ -0,0 +1,27 @@ +use core::sync::atomic::{fence, AtomicI32, Ordering}; + +#[repr(transparent)] +#[derive(Default)] +pub struct RefCount(pub(crate) AtomicI32); + +impl RefCount { + pub fn new(count: u32) -> Self { + Self(AtomicI32::new(count as i32)) + } + + pub fn add_ref(&self) -> u32 { + (self.0.fetch_add(1, Ordering::Relaxed) + 1) as u32 + } + + pub fn release(&self) -> u32 { + let remaining = self.0.fetch_sub(1, Ordering::Release) - 1; + + match remaining.cmp(&0) { + core::cmp::Ordering::Equal => fence(Ordering::Acquire), + core::cmp::Ordering::Less => panic!("Object has been over-released."), + core::cmp::Ordering::Greater => {} + } + + remaining as u32 + } +} -- cgit v1.2.3