1// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
2// Free Software Foundation, Inc.
3//
4// This file is part of the GNU ISO C++ Library.  This library is free
5// software; you can redistribute it and/or modify it under the
6// terms of the GNU General Public License as published by the
7// Free Software Foundation; either version 2, or (at your option)
8// any later version.
9
10// This library is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13// GNU General Public License for more details.
14
15// You should have received a copy of the GNU General Public License along
16// with this library; see the file COPYING.  If not, write to the Free
17// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
18// USA.
19
20// As a special exception, you may use this file as part of a free software
21// library without restriction.  Specifically, if other files instantiate
22// templates or use macros or inline functions from this file, or you compile
23// this file and link it with other files to produce an executable, this
24// file does not by itself cause the resulting executable to be covered by
25// the GNU General Public License.  This exception does not however
26// invalidate any other reasons why the executable file might be covered by
27// the GNU General Public License.
28
29#include "bits/c++config.h"
30#include <fstream>
31#include <istream>
32#include <ostream>
33#include <ext/stdio_filebuf.h>
34#include <ext/stdio_sync_filebuf.h>
35
36// On AIX, and perhaps other systems, library initialization order is
37// not guaranteed.  For example, the static initializers for the main
38// program might run before the static initializers for this library.
39// That means that we cannot rely on static initialization in the
40// library; there is no guarantee that things will get initialized in
41// time.  This file contains definitions of all global variables that
42// require initialization as arrays of characters.
43
44// NB: asm directives can rename these non-exported, namespace
45// __gnu_cxx symbols into exported, namespace std symbols with the
46// appropriate symbol version name.
47// The rename syntax is
48//   asm (".symver currentname,oldname@@GLIBCXX_3.2")
49// In macro form:
50// _GLIBCXX_ASM_SYMVER(currentname, oldname, GLIBCXX_3.2)
51
52_GLIBCXX_BEGIN_NAMESPACE(std)
53
54  // Standard stream objects.
55  // NB: Iff <iostream> is included, these definitions become wonky.
56  typedef char fake_istream[sizeof(istream)]
57  __attribute__ ((aligned(__alignof__(istream))));
58  typedef char fake_ostream[sizeof(ostream)]
59  __attribute__ ((aligned(__alignof__(ostream))));
60  fake_istream cin;
61  fake_ostream cout;
62  fake_ostream cerr;
63  fake_ostream clog;
64
65#ifdef _GLIBCXX_USE_WCHAR_T
66  typedef char fake_wistream[sizeof(wistream)]
67  __attribute__ ((aligned(__alignof__(wistream))));
68  typedef char fake_wostream[sizeof(wostream)]
69  __attribute__ ((aligned(__alignof__(wostream))));
70  fake_wistream wcin;
71  fake_wostream wcout;
72  fake_wostream wcerr;
73  fake_wostream wclog;
74#endif
75
76_GLIBCXX_END_NAMESPACE
77
78namespace __gnu_internal _GLIBCXX_VISIBILITY(hidden)
79{
80  using namespace std;
81  using namespace __gnu_cxx;
82
83  // We use different stream buffer types depending on whether
84  // ios_base::sync_with_stdio(false) has been called.
85  typedef char fake_stdiobuf[sizeof(stdio_sync_filebuf<char>)]
86  __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<char>))));
87  fake_stdiobuf buf_cout_sync;
88  fake_stdiobuf buf_cin_sync;
89  fake_stdiobuf buf_cerr_sync;
90
91  typedef char fake_filebuf[sizeof(stdio_filebuf<char>)]
92  __attribute__ ((aligned(__alignof__(stdio_filebuf<char>))));
93  fake_filebuf buf_cout;
94  fake_filebuf buf_cin;
95  fake_filebuf buf_cerr;
96
97#ifdef _GLIBCXX_USE_WCHAR_T
98  typedef char fake_wstdiobuf[sizeof(stdio_sync_filebuf<wchar_t>)]
99  __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<wchar_t>))));
100  fake_wstdiobuf buf_wcout_sync;
101  fake_wstdiobuf buf_wcin_sync;
102  fake_wstdiobuf buf_wcerr_sync;
103
104  typedef char fake_wfilebuf[sizeof(stdio_filebuf<wchar_t>)]
105  __attribute__ ((aligned(__alignof__(stdio_filebuf<wchar_t>))));
106  fake_wfilebuf buf_wcout;
107  fake_wfilebuf buf_wcin;
108  fake_wfilebuf buf_wcerr;
109#endif
110} // namespace __gnu_internal
111