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data Arc

Atomically counted pointer; T must be frozen or sync to be shared between tasks (§7.3).

Example:

oxl✓ checked in CI
fn length(xs: Shared<List<i64>>) -> usize pure => xs.len()

fn main() io {
  let shared = freeze([1, 2, 3])
  let copy = shared.clone()
  scope {
    let h = spawn length(copy)
    print("{h.join()!} {shared.len()}")
  }
}
Output
3 3
@builtin("Arc") pub(api) data Arc<T>

Thread safety. safe to share when `T` is `frozen`.

Since. 1.0.0-beta

Methods

new(value: T) -> Arc<T>
A new atomically counted pointer to value.
clone() -> Arc<T>
Another pointer to the same value (the count grows by one).

Defined in: std/core/types.oxl:556

See also