1//===- lib/ReaderWriter/MachO/FlatNamespaceFile.h -------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
10#define LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
11
12#include "Atoms.h"
13#include "lld/Core/SharedLibraryFile.h"
14#include "lld/ReaderWriter/MachOLinkingContext.h"
15#include "llvm/Support/Debug.h"
16
17namespace lld {
18namespace mach_o {
19
20//
21// A FlateNamespaceFile instance may be added as a resolution source of last
22// resort, depending on how -flat_namespace and -undefined are set.
23//
24class FlatNamespaceFile : public SharedLibraryFile {
25public:
26  FlatNamespaceFile(const MachOLinkingContext &context)
27    : SharedLibraryFile("flat namespace") { }
28
29  OwningAtomPtr<SharedLibraryAtom> exports(StringRef name) const override {
30    return new (allocator()) MachOSharedLibraryAtom(*this, name, getDSOName(),
31                                                    false);
32  }
33
34  StringRef getDSOName() const override { return "flat-namespace"; }
35
36  const AtomRange<DefinedAtom> defined() const override {
37    return _noDefinedAtoms;
38  }
39  const AtomRange<UndefinedAtom> undefined() const override {
40    return _noUndefinedAtoms;
41  }
42
43  const AtomRange<SharedLibraryAtom> sharedLibrary() const override {
44    return _noSharedLibraryAtoms;
45  }
46
47  const AtomRange<AbsoluteAtom> absolute() const override {
48    return _noAbsoluteAtoms;
49  }
50
51  void clearAtoms() override {
52    _noDefinedAtoms.clear();
53    _noUndefinedAtoms.clear();
54    _noSharedLibraryAtoms.clear();
55    _noAbsoluteAtoms.clear();
56  }
57};
58
59} // namespace mach_o
60} // namespace lld
61
62#endif // LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
63