2008-09-26 Vladimir Makarov <vmakarov@redhat.com>
[official-gcc.git] / libstdc++-v3 / src / globals_io.cc
blob7b34f174defb922c10a72cbb535b35d921a18954
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.
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.
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.
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.
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>
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.
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)
52 _GLIBCXX_BEGIN_NAMESPACE(std)
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;
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
76 _GLIBCXX_END_NAMESPACE
78 namespace __gnu_internal _GLIBCXX_VISIBILITY_ATTR(hidden)
80 using namespace std;
81 using namespace __gnu_cxx;
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;
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;
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;
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