1 //===- lib/ReaderWriter/MachO/FlatNamespaceFile.h -------------------------===//
2 //
3 //                             The LLVM Linker
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
11 #define LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
12 
13 #include "lld/Core/SharedLibraryFile.h"
14 #include "llvm/Support/Debug.h"
15 
16 namespace lld {
17 namespace mach_o {
18 
19 //
20 // A FlateNamespaceFile instance may be added as a resolution source of last
21 // resort, depending on how -flat_namespace and -undefined are set.
22 //
23 class FlatNamespaceFile : public SharedLibraryFile {
24 public:
25   FlatNamespaceFile(const MachOLinkingContext &context)
26     : SharedLibraryFile("flat namespace") { }
27 
28   OwningAtomPtr<SharedLibraryAtom> exports(StringRef name) const override {
29     return new (allocator()) MachOSharedLibraryAtom(*this, name, getDSOName(),
30                                                     false);
31   }
32 
33   StringRef getDSOName() const override { return "flat-namespace"; }
34 
35   const AtomRange<DefinedAtom> defined() const override {
36     return _noDefinedAtoms;
37   }
38   const AtomRange<UndefinedAtom> undefined() const override {
39     return _noUndefinedAtoms;
40   }
41 
42   const AtomRange<SharedLibraryAtom> sharedLibrary() const override {
43     return _noSharedLibraryAtoms;
44   }
45 
46   const AtomRange<AbsoluteAtom> absolute() const override {
47     return _noAbsoluteAtoms;
48   }
49 
50   void clearAtoms() override {
51     _noDefinedAtoms.clear();
52     _noUndefinedAtoms.clear();
53     _noSharedLibraryAtoms.clear();
54     _noAbsoluteAtoms.clear();
55   }
56 };
57 
58 } // namespace mach_o
59 } // namespace lld
60 
61 #endif // LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
62