1 files changed, 60 insertions, 0 deletions
diff --git a/include/lld/Core/ArchiveLibraryFile.h b/include/lld/Core/ArchiveLibraryFile.h
new file mode 100644
index 000000000000..ff379d4f3ecf
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+++ b/include/lld/Core/ArchiveLibraryFile.h
@@ -0,0 +1,60 @@
+//===- Core/ArchiveLibraryFile.h - Models static library ------------------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_CORE_ARCHIVE_LIBRARY_FILE_H
+#define LLD_CORE_ARCHIVE_LIBRARY_FILE_H
+
+#include "lld/Core/File.h"
+#include "lld/Core/Parallel.h"
+#include <set>
+
+namespace lld {
+
+///
+/// The ArchiveLibraryFile subclass of File is used to represent unix
+/// static library archives.  These libraries provide no atoms to the
+/// initial set of atoms linked.  Instead, when the Resolver will query
+/// ArchiveLibraryFile instances for specific symbols names using the
+/// find() method.  If the archive contains an object file which has a
+/// DefinedAtom whose scope is not translationUnit, then that entire
+/// object file File is returned.
+///
+class ArchiveLibraryFile : public File {
+public:
+  static bool classof(const File *f) {
+    return f->kind() == kindArchiveLibrary;
+  }
+
+  /// Check if any member of the archive contains an Atom with the
+  /// specified name and return the File object for that member, or nullptr.
+  virtual File *find(StringRef name, bool dataSymbolOnly) = 0;
+
+  virtual std::error_code
+  parseAllMembers(std::vector<std::unique_ptr<File>> &result) = 0;
+
+  // Parses a member file containing a given symbol, so that when you
+  // need the file find() can return that immediately. Calling this function
+  // has no side effect other than pre-instantiating a file. Calling this
+  // function doesn't affect correctness.
+  virtual void preload(TaskGroup &group, StringRef symbolName) {}
+
+  /// Returns a set of all defined symbols in the archive, i.e. all
+  /// resolvable symbol using this file.
+  virtual std::set<StringRef> getDefinedSymbols() {
+    return std::set<StringRef>();
+  }
+
+protected:
+  /// only subclasses of ArchiveLibraryFile can be instantiated
+  ArchiveLibraryFile(StringRef path) : File(path, kindArchiveLibrary) {}
+};
+
+} // namespace lld
+
+#endif // LLD_CORE_ARCHIVE_LIBRARY_FILE_H