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