initial commit

FileContentsCache.hh

@@ -0,0 +1,42 @@
+#pragma once
+
+#include <memory>
+#include <mutex>
+#include <string>
+#include <unordered_map>
+
+using namespace std;
+
+
+class FileContentsCache {
+private:
+  struct File {
+    std::string name;
+    std::shared_ptr<const std::string> contents;
+    uint64_t load_time;
+
+    File() = delete;
+    File(const std::string& name, std::shared_ptr<const std::string> contents,
+        uint64_t load_time);
+    File(const File&) = delete;
+    File(File&&) = delete;
+    File& operator=(const File&) = delete;
+    File& operator=(File&&) = delete;
+    ~File() = default;
+  };
+
+public:
+  FileContentsCache() = default;
+  FileContentsCache(const FileContentsCache&) = delete;
+  FileContentsCache(FileContentsCache&&) = delete;
+  FileContentsCache& operator=(const FileContentsCache&) = delete;
+  FileContentsCache& operator=(FileContentsCache&&) = delete;
+  ~FileContentsCache() = default;
+
+  std::shared_ptr<const std::string> get(const std::string& name);
+  std::shared_ptr<const std::string> get(const char* name);
+
+private:
+  std::unordered_map<std::string, File> name_to_file;
+  mutable std::mutex lock;
+};