1// Copyright (C) 2001-2020 Free Software Foundation, Inc.
2//
3// This file is part of the GNU ISO C++ Library.  This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 3, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// Under Section 7 of GPL version 3, you are granted additional
15// permissions described in the GCC Runtime Library Exception, version
16// 3.1, as published by the Free Software Foundation.
17
18// You should have received a copy of the GNU General Public License and
19// a copy of the GCC Runtime Library Exception along with this program;
20// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
21// <http://www.gnu.org/licenses/>.
22
23#include "bits/c++config.h"
24#include <fstream>
25#include <istream>
26#include <ostream>
27#include <ext/stdio_filebuf.h>
28#include <ext/stdio_sync_filebuf.h>
29
30// On AIX, and perhaps other systems, library initialization order is
31// not guaranteed.  For example, the static initializers for the main
32// program might run before the static initializers for this library.
33// That means that we cannot rely on static initialization in the
34// library; there is no guarantee that things will get initialized in
35// time.  This file contains definitions of all global variables that
36// require initialization as arrays of characters.
37
38// NB: asm directives can rename these non-exported, namespace
39// __gnu_cxx symbols into exported, namespace std symbols with the
40// appropriate symbol version name.
41// The rename syntax is
42//   asm (".symver currentname,oldname@@GLIBCXX_3.2")
43// In macro form:
44// _GLIBCXX_ASM_SYMVER(currentname, oldname, GLIBCXX_3.2)
45
46namespace std _GLIBCXX_VISIBILITY(default)
47{
48_GLIBCXX_BEGIN_NAMESPACE_VERSION
49
50  // Standard stream objects.
51  // NB: Iff <iostream> is included, these definitions become wonky.
52  typedef char fake_istream[sizeof(istream)]
53  __attribute__ ((aligned(__alignof__(istream))));
54  typedef char fake_ostream[sizeof(ostream)]
55  __attribute__ ((aligned(__alignof__(ostream))));
56  fake_istream cin;
57  fake_ostream cout;
58  fake_ostream cerr;
59  fake_ostream clog;
60
61#ifdef _GLIBCXX_USE_WCHAR_T
62  typedef char fake_wistream[sizeof(wistream)]
63  __attribute__ ((aligned(__alignof__(wistream))));
64  typedef char fake_wostream[sizeof(wostream)]
65  __attribute__ ((aligned(__alignof__(wostream))));
66  fake_wistream wcin;
67  fake_wostream wcout;
68  fake_wostream wcerr;
69  fake_wostream wclog;
70#endif
71
72_GLIBCXX_END_NAMESPACE_VERSION
73} // namespace
74
75namespace __gnu_internal _GLIBCXX_VISIBILITY(hidden)
76{
77  using namespace std;
78  using namespace __gnu_cxx;
79
80  // We use different stream buffer types depending on whether
81  // ios_base::sync_with_stdio(false) has been called.
82  typedef char fake_stdiobuf[sizeof(stdio_sync_filebuf<char>)]
83  __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<char>))));
84  fake_stdiobuf buf_cout_sync;
85  fake_stdiobuf buf_cin_sync;
86  fake_stdiobuf buf_cerr_sync;
87
88  typedef char fake_filebuf[sizeof(stdio_filebuf<char>)]
89  __attribute__ ((aligned(__alignof__(stdio_filebuf<char>))));
90  fake_filebuf buf_cout;
91  fake_filebuf buf_cin;
92  fake_filebuf buf_cerr;
93
94#ifdef _GLIBCXX_USE_WCHAR_T
95  typedef char fake_wstdiobuf[sizeof(stdio_sync_filebuf<wchar_t>)]
96  __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<wchar_t>))));
97  fake_wstdiobuf buf_wcout_sync;
98  fake_wstdiobuf buf_wcin_sync;
99  fake_wstdiobuf buf_wcerr_sync;
100
101  typedef char fake_wfilebuf[sizeof(stdio_filebuf<wchar_t>)]
102  __attribute__ ((aligned(__alignof__(stdio_filebuf<wchar_t>))));
103  fake_wfilebuf buf_wcout;
104  fake_wfilebuf buf_wcin;
105  fake_wfilebuf buf_wcerr;
106#endif
107} // namespace __gnu_internal
108