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Nov 26, 2022
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Add a section on hermit-sync #133

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23 changes: 23 additions & 0 deletions content/this-month/2022-11/index.md
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Expand Up @@ -113,6 +113,29 @@ The initial nightlies containing the prebuilt UEFI targets revealed some issues
Finally, we [changed the C compiler for the UEFI targets from gcc to clang](https://github.com/rust-lang/rust/pull/104622), which resolved some linker problems.
As of the 2022-11-22 nightly, the three UEFI targets should be fully usable, which means you no longer need to use the unstable `-Zbuild-std` feature.

### [`hermitcore/hermit-sync`](https://github.com/hermitcore/hermit-sync)
<span class="maintainers">(Section written by [@mkroening](https://github.com/mkroening))</span>

While working on the [`libhermit-rs`] kernel, I moved the synchronization primitives targeted at kernel development into a separate crate: [`hermit-sync`].
Whilst I was there, I also enhanced the code and made it independent from libhermit, so the code can now be used in other projects as well; at least x86_64 and aarch64 ones for the moment.

The crate contains the following features:

* a function for running a closure without interrupts
* a simple spinlock with exponential backoff
* a fair ticket lock with exponential backoff
* `OnceCell` and `Lazy` based on [`generic_once_cell`] (another recent project of mine)

All of these primitives are available with and without interrupt safety.
See the [API docs] for more details.

Any feedback is very welcome of course.

[`libhermit-rs`]: https://github.com/hermitcore/libhermit-rs
[`hermit-sync`]: https://github.com/hermitcore/hermit-sync
[`generic_once_cell`]: https://github.com/mkroening/generic_once_cell
[API docs]: https://docs.rs/hermit-sync

## Other News

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