| commit | a49aba6865503d0ae4dd4064135190b80fd2e977 | [log] [tgz] |
|---|---|---|
| author | James Farrell <[email protected]> | Fri Sep 20 17:09:05 2024 +0000 |
| committer | Automerger Merge Worker <[email protected]> | Fri Sep 20 17:09:05 2024 +0000 |
| tree | bd7116c534d29fd5c9137e2ee96c318b196f9131 | |
| parent | 4f8edd77ad13ed60ff0e187d864087b51e07b68a [diff] | |
| parent | e3a74b5a3c624273975a41d5586e490de241c311 [diff] |
Migrate 26 crates to monorepo am: e3a74b5a3c Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/try-lock/+/3272314 Change-Id: Ic1f0ec728ba194e5d6c4db03989d2c5baacac029 Signed-off-by: Automerger Merge Worker <[email protected]>
A light-weight lock guarded by an atomic boolean.
Most efficient when contention is low, acquiring the lock is a single atomic swap, and releasing it just 1 more atomic swap.
use std::sync::Arc; use try_lock::TryLock; // a thing we want to share struct Widget { name: String, } // lock it up! let widget1 = Arc::new(TryLock::new(Widget { name: "Spanner".into(), })); let widget2 = widget1.clone(); // mutate the widget let mut locked = widget1.try_lock().expect("example isn't locked yet"); locked.name.push_str(" Bundle"); // hands off, buddy let not_locked = widget2.try_lock(); assert!(not_locked.is_none(), "widget1 has the lock"); // ok, you can have it drop(locked); let locked2 = widget2.try_lock().expect("widget1 lock is released"); assert_eq!(locked2.name, "Spanner Bundle");