# `cortex-m-funnel` > A lock-free, wait-free, block-free logger for the ARM Cortex-M architecture (lock-free as in logging doesn't block interrupt handlers; wait-free as in there's no spinning (e.g. CAS loop) to get a handle; and block-free as in the logger never waits for an I/O transfer (e.g. ITM, UART, etc.) to complete) Status: ☢️ **Experimental** ☢️ (ALPHA PRE-RELEASE) ## [Documentation](https://docs.rs/cortex-m-funnel) ## License Licensed under either of - Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) - MIT license ([LICENSE-MIT](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.