1 // Copyright (C) 2001-2021 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 46 namespace 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 75 namespace __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