1 files changed, 44 insertions, 0 deletions
diff --git a/clang/lib/Serialization/ModuleCache.cpp b/clang/lib/Serialization/ModuleCache.cpp
new file mode 100644
index 0000000..955e5f3
--- /dev/null
+++ b/clang/lib/Serialization/ModuleCache.cpp
@@ -0,0 +1,44 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Serialization/ModuleCache.h"
+
+#include "clang/Serialization/InMemoryModuleCache.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/LockFileManager.h"
+#include "llvm/Support/Path.h"
+
+using namespace clang;
+
+namespace {
+class CrossProcessModuleCache : public ModuleCache {
+  InMemoryModuleCache InMemory;
+
+public:
+  void prepareForGetLock(StringRef ModuleFilename) override {
+    // FIXME: Do this in LockFileManager and only if the directory doesn't
+    // exist.
+    StringRef Dir = llvm::sys::path::parent_path(ModuleFilename);
+    llvm::sys::fs::create_directories(Dir);
+  }
+
+  std::unique_ptr<llvm::AdvisoryLock>
+  getLock(StringRef ModuleFilename) override {
+    return std::make_unique<llvm::LockFileManager>(ModuleFilename);
+  }
+
+  InMemoryModuleCache &getInMemoryModuleCache() override { return InMemory; }
+  const InMemoryModuleCache &getInMemoryModuleCache() const override {
+    return InMemory;
+  }
+};
+} // namespace
+
+IntrusiveRefCntPtr<ModuleCache> clang::createCrossProcessModuleCache() {
+  return llvm::makeIntrusiveRefCnt<CrossProcessModuleCache>();
+}