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a22be5af72
Migrates the remaining crates to edition 2024. We like to stay on the latest edition if possible. There is no functional changes, however some code changes had to be done to accommodate the edition's breaking changes. Like the previous migration PRs, this is comprised of three commits: * the first does the edition update and makes `cargo check`/`cargo clippy` pass. we had to update bindgen to make its output [satisfy the requirements of edition 2024](https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html) * the second commit does a `cargo fmt` for the new style edition. * the third commit reorders imports as a one-off change. As before, it is entirely optional. Part of #10918
56 lines
1.2 KiB
Rust
56 lines
1.2 KiB
Rust
//! A wrapper around `ArcSwap` that ensures there is only one writer at a time and writes
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//! don't block reads.
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use std::sync::Arc;
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use arc_swap::ArcSwap;
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use tokio::sync::TryLockError;
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pub struct GuardArcSwap<T> {
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inner: ArcSwap<T>,
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guard: tokio::sync::Mutex<()>,
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}
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pub struct Guard<'a, T> {
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_guard: tokio::sync::MutexGuard<'a, ()>,
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inner: &'a ArcSwap<T>,
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}
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impl<T> GuardArcSwap<T> {
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pub fn new(inner: T) -> Self {
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Self {
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inner: ArcSwap::new(Arc::new(inner)),
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guard: tokio::sync::Mutex::new(()),
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}
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}
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pub fn read(&self) -> Arc<T> {
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self.inner.load_full()
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}
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pub async fn write_guard(&self) -> Guard<'_, T> {
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Guard {
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_guard: self.guard.lock().await,
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inner: &self.inner,
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}
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}
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pub fn try_write_guard(&self) -> Result<Guard<'_, T>, TryLockError> {
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let guard = self.guard.try_lock()?;
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Ok(Guard {
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_guard: guard,
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inner: &self.inner,
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})
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}
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}
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impl<T> Guard<'_, T> {
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pub fn read(&self) -> Arc<T> {
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self.inner.load_full()
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}
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pub fn write(&mut self, value: T) {
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self.inner.store(Arc::new(value));
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}
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}
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