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Diffstat (limited to 'libstdc++-v3/src/globals_io.cc')
| -rw-r--r-- | libstdc++-v3/src/globals_io.cc | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/libstdc++-v3/src/globals_io.cc b/libstdc++-v3/src/globals_io.cc new file mode 100644 index 000000000..722abacbe --- /dev/null +++ b/libstdc++-v3/src/globals_io.cc @@ -0,0 +1,108 @@ +// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2009, 2011 +// Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. + +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// <http://www.gnu.org/licenses/>. + +#include "bits/c++config.h" +#include <fstream> +#include <istream> +#include <ostream> +#include <ext/stdio_filebuf.h> +#include <ext/stdio_sync_filebuf.h> + +// On AIX, and perhaps other systems, library initialization order is +// not guaranteed. For example, the static initializers for the main +// program might run before the static initializers for this library. +// That means that we cannot rely on static initialization in the +// library; there is no guarantee that things will get initialized in +// time. This file contains definitions of all global variables that +// require initialization as arrays of characters. + +// NB: asm directives can rename these non-exported, namespace +// __gnu_cxx symbols into exported, namespace std symbols with the +// appropriate symbol version name. +// The rename syntax is +// asm (".symver currentname,oldname@@GLIBCXX_3.2") +// In macro form: +// _GLIBCXX_ASM_SYMVER(currentname, oldname, GLIBCXX_3.2) + +namespace std _GLIBCXX_VISIBILITY(default) +{ +_GLIBCXX_BEGIN_NAMESPACE_VERSION + + // Standard stream objects. + // NB: Iff <iostream> is included, these definitions become wonky. + typedef char fake_istream[sizeof(istream)] + __attribute__ ((aligned(__alignof__(istream)))); + typedef char fake_ostream[sizeof(ostream)] + __attribute__ ((aligned(__alignof__(ostream)))); + fake_istream cin; + fake_ostream cout; + fake_ostream cerr; + fake_ostream clog; + +#ifdef _GLIBCXX_USE_WCHAR_T + typedef char fake_wistream[sizeof(wistream)] + __attribute__ ((aligned(__alignof__(wistream)))); + typedef char fake_wostream[sizeof(wostream)] + __attribute__ ((aligned(__alignof__(wostream)))); + fake_wistream wcin; + fake_wostream wcout; + fake_wostream wcerr; + fake_wostream wclog; +#endif + +_GLIBCXX_END_NAMESPACE_VERSION +} // namespace + +namespace __gnu_internal _GLIBCXX_VISIBILITY(hidden) +{ + using namespace std; + using namespace __gnu_cxx; + + // We use different stream buffer types depending on whether + // ios_base::sync_with_stdio(false) has been called. + typedef char fake_stdiobuf[sizeof(stdio_sync_filebuf<char>)] + __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<char>)))); + fake_stdiobuf buf_cout_sync; + fake_stdiobuf buf_cin_sync; + fake_stdiobuf buf_cerr_sync; + + typedef char fake_filebuf[sizeof(stdio_filebuf<char>)] + __attribute__ ((aligned(__alignof__(stdio_filebuf<char>)))); + fake_filebuf buf_cout; + fake_filebuf buf_cin; + fake_filebuf buf_cerr; + +#ifdef _GLIBCXX_USE_WCHAR_T + typedef char fake_wstdiobuf[sizeof(stdio_sync_filebuf<wchar_t>)] + __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<wchar_t>)))); + fake_wstdiobuf buf_wcout_sync; + fake_wstdiobuf buf_wcin_sync; + fake_wstdiobuf buf_wcerr_sync; + + typedef char fake_wfilebuf[sizeof(stdio_filebuf<wchar_t>)] + __attribute__ ((aligned(__alignof__(stdio_filebuf<wchar_t>)))); + fake_wfilebuf buf_wcout; + fake_wfilebuf buf_wcin; + fake_wfilebuf buf_wcerr; +#endif +} // namespace __gnu_internal |