generic_once_cell

generic_once_cell is a generic no_std version of once_cell. Internal synchronization for initialization is provided as type parameter via custom mutexes based on lock_api. This makes it suitable for use in complex no_std scenarios where once_cell's critical-section support and once_cell::race are not sufficient.

The core API looks roughly like this:

impl<R: lock_api::RawMutex, T> OnceCell<R, T> {
    const fn new() -> Self { ... }
    fn set(&self, value: T) -> Result<(), T> { ... }
    fn get(&self) -> Option<&T> { ... }
}

More patterns and use-cases are in the docs!

License

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.

Contribution

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.