bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ra-salsa/src/revision.rs')
-rw-r--r--crates/ra-salsa/src/revision.rs66
1 files changed, 0 insertions, 66 deletions
diff --git a/crates/ra-salsa/src/revision.rs b/crates/ra-salsa/src/revision.rs
deleted file mode 100644
index 7f4c333fb1..0000000000
--- a/crates/ra-salsa/src/revision.rs
+++ /dev/null
@@ -1,66 +0,0 @@
-use std::num::NonZeroU32;
-use std::sync::atomic::{AtomicU32, Ordering};
-
-/// Value of the initial revision, as a u32. We don't use 0
-/// because we want to use a `NonZeroU32`.
-const START: u32 = 1;
-
-/// A unique identifier for the current version of the database; each
-/// time an input is changed, the revision number is incremented.
-/// `Revision` is used internally to track which values may need to be
-/// recomputed, but is not something you should have to interact with
-/// directly as a user of salsa.
-#[derive(Copy, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
-pub struct Revision {
- generation: NonZeroU32,
-}
-
-impl Revision {
- pub(crate) fn start() -> Self {
- Self::from(START)
- }
-
- pub(crate) fn from(g: u32) -> Self {
- Self { generation: NonZeroU32::new(g).unwrap() }
- }
-
- pub(crate) fn next(self) -> Revision {
- Self::from(self.generation.get() + 1)
- }
-
- fn as_u32(self) -> u32 {
- self.generation.get()
- }
-}
-
-impl std::fmt::Debug for Revision {
- fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
- write!(fmt, "R{}", self.generation)
- }
-}
-
-#[derive(Debug)]
-pub(crate) struct AtomicRevision {
- data: AtomicU32,
-}
-
-impl AtomicRevision {
- pub(crate) const fn start() -> Self {
- Self { data: AtomicU32::new(START) }
- }
-
- pub(crate) fn load(&self) -> Revision {
- Revision::from(self.data.load(Ordering::SeqCst))
- }
-
- pub(crate) fn store(&self, r: Revision) {
- self.data.store(r.as_u32(), Ordering::SeqCst);
- }
-
- /// Increment by 1, returning previous value.
- pub(crate) fn fetch_then_increment(&self) -> Revision {
- let v = self.data.fetch_add(1, Ordering::SeqCst);
- assert!(v != u32::MAX, "revision overflow");
- Revision::from(v)
- }
-}