This crate provides CallOnce, a simple, thread-safe type that can only be called successfully once:
use call_once::CallOnce;
static CALL_ONCE: CallOnce = CallOnce::new();
assert!(CALL_ONCE.call_once().is_ok());
assert!(CALL_ONCE.call_once().is_err());For API documentation, see the docs.
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.