Method decrease_ref_count

backends/vllm/src/block.rs:247–257

Decreases the reference count by 1. # Returns - `Ok(())` if the reference count was successfully decreased. - `Err(BlockError::ReferenceCountError)` if the reference count is already zero. # Errors This method will return an error if the reference count is already zero, as it's not possible to decrease it further.

(&mut self)

    /// This method will return an error if the reference count is already zero,
    /// as it's not possible to decrease it further.
    pub fn decrease_ref_count(&mut self) -> Result<(), BlockError> {
        if self.ref_count > 0 {
            self.ref_count -= 1;
            Ok(())
        } else {
            error!(
                "Reference counter is already zero, trying to dereference once more which should not be possible.."
            );
            Err(BlockError::ReferenceCountError)
        }
    }
}

/// A thread-safe, shared-ownership wrapper for `PhysicalTokenBlock`.