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  1. // Copyright (C) 2001-2015 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.