================
@@ -204,6 +237,35 @@ class DependencyScanningFilesystemSharedCache {
getOrInsertEntryForFilename(StringRef Filename,
const CachedFileSystemEntry &Entry);
+ /// Claims a slot for \p Filename. If a resolved entry already exists,
+ /// returns it. If another worker is currently producing a result for this
+ /// filename, blocks on its \c InProgressEntry until done and returns the
+ /// produced entry. Otherwise installs a fresh \c InProgressEntry and
+ /// returns it as a producer slot which the caller must complete via
+ /// \c fulfilFilenameSlot.
+ SlotAcquisitionResult acquireFilenameSlot(StringRef);
+
+ /// Claims a slot for \p UID. Same semantics as \c acquireFilenameSlot but
+ /// keyed by unique ID; used after \c stat() has identified a file so that
+ /// concurrent \c readFile() calls for the same on-disk file (reached via
+ /// different filenames) collapse onto a single open.
+ SlotAcquisitionResult acquireUIDSlot(llvm::sys::fs::UniqueID);
+
+ /// Completes a producer slot acquired via \c acquireFilenameSlot.
+ /// Publishes \p Result under \p Filename in \c CacheByFilename,
+ /// records it in the slot, marks the slot done, removes the
+ /// in-progress entry, and notifies waiters.
+ void fulfilFilenameSlot(StringRef, const std::shared_ptr<InProgressEntry>
&,
----------------
jansvoboda11 wrote:
TIL both spellings are correct 😅
https://github.com/llvm/llvm-project/pull/199680
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