Method safe_inc

crates/common/src/refcount.rs:123–143

(&self)

    #[inline]
    #[must_use]
    pub fn safe_inc(&self) -> bool {
        let mut old = State::from_raw(self.state.load(Ordering::Relaxed));
        loop {
            if old.destructed() || old.strong() == 0 {
                return false;
            }
            if (old.strong() as usize) >= STRONG {
                refcount_overflow();
            }
            let new_state = old.add_strong(1);
            match self.state.compare_exchange_weak(
                old.as_raw(),
                new_state.as_raw(),
                Ordering::Relaxed,
                Ordering::Relaxed,
            ) {
                Ok(_) => return true,
                Err(curr) => old = State::from_raw(curr),
            }
        }
    }

    /// Decrement strong count. Returns true when count drops to 0.
    #[inline]