================
@@ -166,6 +190,18 @@ class DependencyScanningFilesystemSharedCache {
llvm::DenseMap<llvm::sys::fs::UniqueID, const CachedFileSystemEntry *>
EntriesByUID;
+ /// Filenames whose cache entry is currently being computed. A second
+ /// worker reaching the same filename will wait on the entry's condition
+ /// variable rather than racing the underlying filesystem.
+ llvm::StringMap<std::shared_ptr<InProgressEntry>> InProgressByFilename;
----------------
jansvoboda11 wrote:
The keys here can get fairly long. How hard would it be to fold these new maps
into the existing ones?
https://github.com/llvm/llvm-project/pull/199680
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