diff options
Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/src/ios_init.cc')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/src/ios_init.cc | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/src/ios_init.cc b/gcc-4.4.3/libstdc++-v3/src/ios_init.cc new file mode 100644 index 000000000..5c53bcae8 --- /dev/null +++ b/gcc-4.4.3/libstdc++-v3/src/ios_init.cc @@ -0,0 +1,199 @@ +// Iostreams base classes -*- C++ -*- + +// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, +// 2006, 2007, 2008, 2009 +// 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/>. + +// +// ISO C++ 14882: 27.4 Iostreams base classes +// + +#include <ios> +#include <ostream> +#include <istream> +#include <fstream> +#include <ext/stdio_filebuf.h> +#include <ext/stdio_sync_filebuf.h> + +namespace __gnu_internal _GLIBCXX_VISIBILITY_ATTR(hidden) +{ + using namespace __gnu_cxx; + + // Extern declarations for global objects in src/globals.cc. + extern stdio_sync_filebuf<char> buf_cout_sync; + extern stdio_sync_filebuf<char> buf_cin_sync; + extern stdio_sync_filebuf<char> buf_cerr_sync; + + extern stdio_filebuf<char> buf_cout; + extern stdio_filebuf<char> buf_cin; + extern stdio_filebuf<char> buf_cerr; + +#ifdef _GLIBCXX_USE_WCHAR_T + extern stdio_sync_filebuf<wchar_t> buf_wcout_sync; + extern stdio_sync_filebuf<wchar_t> buf_wcin_sync; + extern stdio_sync_filebuf<wchar_t> buf_wcerr_sync; + + extern stdio_filebuf<wchar_t> buf_wcout; + extern stdio_filebuf<wchar_t> buf_wcin; + extern stdio_filebuf<wchar_t> buf_wcerr; +#endif +} // namespace __gnu_internal + +_GLIBCXX_BEGIN_NAMESPACE(std) + + using namespace __gnu_internal; + + extern istream cin; + extern ostream cout; + extern ostream cerr; + extern ostream clog; + +#ifdef _GLIBCXX_USE_WCHAR_T + extern wistream wcin; + extern wostream wcout; + extern wostream wcerr; + extern wostream wclog; +#endif + + ios_base::Init::Init() + { + if (__gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, 1) == 0) + { + // Standard streams default to synced with "C" operations. + _S_synced_with_stdio = true; + + new (&buf_cout_sync) stdio_sync_filebuf<char>(stdout); + new (&buf_cin_sync) stdio_sync_filebuf<char>(stdin); + new (&buf_cerr_sync) stdio_sync_filebuf<char>(stderr); + + // The standard streams are constructed once only and never + // destroyed. + new (&cout) ostream(&buf_cout_sync); + new (&cin) istream(&buf_cin_sync); + new (&cerr) ostream(&buf_cerr_sync); + new (&clog) ostream(&buf_cerr_sync); + cin.tie(&cout); + cerr.flags(ios_base::unitbuf); + // _GLIBCXX_RESOLVE_LIB_DEFECTS + // 455. cerr::tie() and wcerr::tie() are overspecified. + cerr.tie(&cout); + +#ifdef _GLIBCXX_USE_WCHAR_T + new (&buf_wcout_sync) stdio_sync_filebuf<wchar_t>(stdout); + new (&buf_wcin_sync) stdio_sync_filebuf<wchar_t>(stdin); + new (&buf_wcerr_sync) stdio_sync_filebuf<wchar_t>(stderr); + + new (&wcout) wostream(&buf_wcout_sync); + new (&wcin) wistream(&buf_wcin_sync); + new (&wcerr) wostream(&buf_wcerr_sync); + new (&wclog) wostream(&buf_wcerr_sync); + wcin.tie(&wcout); + wcerr.flags(ios_base::unitbuf); + wcerr.tie(&wcout); +#endif + + // NB: Have to set refcount above one, so that standard + // streams are not re-initialized with uses of ios_base::Init + // besides <iostream> static object, ie just using <ios> with + // ios_base::Init objects. + __gnu_cxx::__atomic_add_dispatch(&_S_refcount, 1); + } + } + + ios_base::Init::~Init() + { + if (__gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, -1) == 2) + { + // Catch any exceptions thrown by basic_ostream::flush() + __try + { + // Flush standard output streams as required by 27.4.2.1.6 + cout.flush(); + cerr.flush(); + clog.flush(); + +#ifdef _GLIBCXX_USE_WCHAR_T + wcout.flush(); + wcerr.flush(); + wclog.flush(); +#endif + } + __catch(...) + { } + } + } + + bool + ios_base::sync_with_stdio(bool __sync) + { + // _GLIBCXX_RESOLVE_LIB_DEFECTS + // 49. Underspecification of ios_base::sync_with_stdio + bool __ret = ios_base::Init::_S_synced_with_stdio; + + // Turn off sync with C FILE* for cin, cout, cerr, clog iff + // currently synchronized. + if (!__sync && __ret) + { + // Make sure the standard streams are constructed. + ios_base::Init __init; + + ios_base::Init::_S_synced_with_stdio = __sync; + + // Explicitly call dtors to free any memory that is + // dynamically allocated by filebuf ctor or member functions, + // but don't deallocate all memory by calling operator delete. + buf_cout_sync.~stdio_sync_filebuf<char>(); + buf_cin_sync.~stdio_sync_filebuf<char>(); + buf_cerr_sync.~stdio_sync_filebuf<char>(); + +#ifdef _GLIBCXX_USE_WCHAR_T + buf_wcout_sync.~stdio_sync_filebuf<wchar_t>(); + buf_wcin_sync.~stdio_sync_filebuf<wchar_t>(); + buf_wcerr_sync.~stdio_sync_filebuf<wchar_t>(); +#endif + + // Create stream buffers for the standard streams and use + // those buffers without destroying and recreating the + // streams. + new (&buf_cout) stdio_filebuf<char>(stdout, ios_base::out); + new (&buf_cin) stdio_filebuf<char>(stdin, ios_base::in); + new (&buf_cerr) stdio_filebuf<char>(stderr, ios_base::out); + cout.rdbuf(&buf_cout); + cin.rdbuf(&buf_cin); + cerr.rdbuf(&buf_cerr); + clog.rdbuf(&buf_cerr); + +#ifdef _GLIBCXX_USE_WCHAR_T + new (&buf_wcout) stdio_filebuf<wchar_t>(stdout, ios_base::out); + new (&buf_wcin) stdio_filebuf<wchar_t>(stdin, ios_base::in); + new (&buf_wcerr) stdio_filebuf<wchar_t>(stderr, ios_base::out); + wcout.rdbuf(&buf_wcout); + wcin.rdbuf(&buf_wcin); + wcerr.rdbuf(&buf_wcerr); + wclog.rdbuf(&buf_wcerr); +#endif + } + return __ret; + } + +_GLIBCXX_END_NAMESPACE |