Address PR comments

crates/rust-analyzer/src/global_state.rs

@@ -3,15 +3,12 @@
 //!
 //! Each tick provides an immutable snapshot of the state as `WorldSnapshot`.
 
-use std::{
-    sync::{Arc, Mutex},
-    time::Instant,
-};
+use std::{sync::Arc, time::Instant};
 
 use crossbeam_channel::{unbounded, Receiver, Sender};
 use flycheck::FlycheckHandle;
 use lsp_types::{SemanticTokens, Url};
-use parking_lot::RwLock;
+use parking_lot::{Mutex, RwLock};
 use ra_db::{CrateId, VfsPath};
 use ra_ide::{Analysis, AnalysisChange, AnalysisHost, FileId};
 use ra_project_model::{CargoWorkspace, ProcMacroClient, ProjectWorkspace, Target};

crates/rust-analyzer/src/handlers.rs

@@ -1187,10 +1187,7 @@ pub(crate) fn handle_semantic_tokens(
     let semantic_tokens = to_proto::semantic_tokens(&text, &line_index, highlights);
 
     // Unconditionally cache the tokens
-    snap.semantic_tokens_cache
-        .lock()
-        .unwrap()
-        .insert(params.text_document.uri, semantic_tokens.clone());
+    snap.semantic_tokens_cache.lock().insert(params.text_document.uri, semantic_tokens.clone());
 
     Ok(Some(semantic_tokens.into()))
 }
@@ -1209,7 +1206,7 @@ pub(crate) fn handle_semantic_tokens_edits(
 
     let semantic_tokens = to_proto::semantic_tokens(&text, &line_index, highlights);
 
-    let mut cache = snap.semantic_tokens_cache.lock().unwrap();
+    let mut cache = snap.semantic_tokens_cache.lock();
     let cached_tokens = cache.entry(params.text_document.uri).or_default();
 
     if let Some(prev_id) = &cached_tokens.result_id {

crates/rust-analyzer/src/main_loop.rs

@@ -452,7 +452,7 @@ fn on_notification(&mut self, not: Notification) -> Result<()> {
                         None => log::error!("orphan DidCloseTextDocument: {}", path),
                     }
 
-                    this.semantic_tokens_cache.lock().unwrap().remove(&params.text_document.uri);
+                    this.semantic_tokens_cache.lock().remove(&params.text_document.uri);
 
                     if let Some(path) = path.as_path() {
                         this.loader.handle.invalidate(path.to_path_buf());

crates/rust-analyzer/src/to_proto.rs

@@ -1,6 +1,8 @@
 //! Conversion of rust-analyzer specific types to lsp_types equivalents.
-use std::path::{self, Path};
-use std::time::SystemTime;
+use std::{
+    path::{self, Path},
+    sync::atomic::{AtomicU32, Ordering},
+};
 
 use itertools::Itertools;
 use ra_db::{FileId, FileRange};
@@ -304,16 +306,14 @@ pub(crate) fn inlay_int(line_index: &LineIndex, inlay_hint: InlayHint) -> lsp_ex
     }
 }
 
+static TOKEN_RESULT_COUNTER: AtomicU32 = AtomicU32::new(1);
+
 pub(crate) fn semantic_tokens(
     text: &str,
     line_index: &LineIndex,
     highlights: Vec<HighlightedRange>,
 ) -> lsp_types::SemanticTokens {
-    let id = match SystemTime::now().duration_since(SystemTime::UNIX_EPOCH) {
-        Ok(d) => d.as_millis().to_string(),
-        Err(_) => String::new(),
-    };
-
+    let id = TOKEN_RESULT_COUNTER.fetch_add(1, Ordering::SeqCst).to_string();
     let mut builder = semantic_tokens::SemanticTokensBuilder::new(id);
 
     for highlight_range in highlights {