Method push

crates/wasi-common/src/table.rs:35–51

Insert a resource at the next available index.

(&self, a: Arc<T>)

    /// Insert a resource at the next available index.
    pub fn push<T: Any + Send + Sync>(&self, a: Arc<T>) -> Result<u32, Error> {
        let mut inner = self.0.write().unwrap();
        // NOTE: The performance of this new key calculation could be very bad once keys wrap
        // around.
        if inner.map.len() == u32::MAX as usize {
            return Err(Error::trap(EnvError::msg("table has no free keys")));
        }
        loop {
            let key = inner.next_key;
            inner.next_key += 1;
            if inner.map.contains_key(&key) {
                continue;
            }
            inner.map.insert(key, a);
            return Ok(key);
        }
    }

    /// Check if the table has a resource at the given index.
    pub fn contains_key(&self, key: u32) -> bool {