libstdc++-v3/src/globals.cc

   1 // Copyright (C) 2001, 2002, 2003 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 2, 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 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17 // USA.
  18
  19 // As a special exception, you may use this file as part of a free software
  20 // library without restriction.  Specifically, if other files instantiate
  21 // templates or use macros or inline functions from this file, or you compile
  22 // this file and link it with other files to produce an executable, this
  23 // file does not by itself cause the resulting executable to be covered by
  24 // the GNU General Public License.  This exception does not however
  25 // invalidate any other reasons why the executable file might be covered by
  26 // the GNU General Public License.
  27
  28 #include "bits/c++config.h"
  29 #include "bits/gthr.h"
  30 #include <fstream>
  31 #include <istream>
  32 #include <ostream>
  33 #include <locale>
  34 #include <ext/stdio_filebuf.h>
  35 #include <ext/stdio_sync_filebuf.h>
  36
  37 // On AIX, and perhaps other systems, library initialization order is
  38 // not guaranteed.  For example, the static initializers for the main
  39 // program might run before the static initializers for this library.
  40 // That means that we cannot rely on static initialization in the
  41 // library; there is no guarantee that things will get initialized in
  42 // time.  This file contains definitions of all global variables that
  43 // require initialization as arrays of characters.
  44
  45 // NB: asm directives can rename these non-exported, namespace
  46 // __gnu_cxx symbols into exported, namespace std symbols with the
  47 // appropriate symbol version name.
  48 // The rename syntax is
  49 //   asm (".symver currentname,oldname@@GLIBCPP_3.2")
  50 // In macro form:
  51 // _GLIBCPP_ASM_SYMVER(currentname, oldname, GLIBCPP_3.2)
  52
  53 namespace std
  54 {
  55   // Standard stream objects.
  56   // NB: Iff <iostream> is included, these definitions become wonky.
  57   typedef char fake_istream[sizeof(istream)]
  58   __attribute__ ((aligned(__alignof__(istream))));
  59   typedef char fake_ostream[sizeof(ostream)]
  60   __attribute__ ((aligned(__alignof__(ostream))));
  61   fake_istream cin;
  62   fake_ostream cout;
  63   fake_ostream cerr;
  64   fake_ostream clog;
  65
  66 #ifdef _GLIBCPP_USE_WCHAR_T
  67   typedef char fake_wistream[sizeof(wistream)]
  68   __attribute__ ((aligned(__alignof__(wistream))));
  69   typedef char fake_wostream[sizeof(wostream)]
  70   __attribute__ ((aligned(__alignof__(wostream))));
  71   fake_wistream wcin;
  72   fake_wostream wcout;
  73   fake_wostream wcerr;
  74   fake_wostream wclog;
  75 #endif
  76 } // namespace std
  77
  78 namespace __gnu_cxx
  79 {
  80   using namespace std;
  81
  82   // We use different stream buffer types depending on whether
  83   // ios_base::sync_with_stdio(false) has been called.
  84   typedef char fake_stdiobuf[sizeof(stdio_sync_filebuf<char>)]
  85   __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<char>))));
  86   fake_stdiobuf buf_cout_sync;
  87   fake_stdiobuf buf_cin_sync;
  88   fake_stdiobuf buf_cerr_sync;
  89
  90   typedef char fake_filebuf[sizeof(stdio_filebuf<char>)]
  91   __attribute__ ((aligned(__alignof__(stdio_filebuf<char>))));
  92   fake_filebuf buf_cout;
  93   fake_filebuf buf_cin;
  94   fake_filebuf buf_cerr;
  95
  96 #ifdef _GLIBCPP_USE_WCHAR_T
  97   typedef char fake_wstdiobuf[sizeof(stdio_sync_filebuf<wchar_t>)]
  98   __attribute__ ((aligned(__alignof__(stdio_sync_filebuf<wchar_t>))));
  99   fake_wstdiobuf buf_wcout_sync;
 100   fake_wstdiobuf buf_wcin_sync;
 101   fake_wstdiobuf buf_wcerr_sync;
 102
 103   typedef char fake_wfilebuf[sizeof(stdio_filebuf<wchar_t>)]
 104   __attribute__ ((aligned(__alignof__(stdio_filebuf<wchar_t>))));
 105   fake_wfilebuf buf_wcout;
 106   fake_wfilebuf buf_wcin;
 107   fake_wfilebuf buf_wcerr;
 108 #endif
 109
 110   typedef char fake_locale_Impl[sizeof(locale::_Impl)]
 111   __attribute__ ((aligned(__alignof__(locale::_Impl))));
 112   fake_locale_Impl c_locale_impl;
 113
 114   typedef char fake_locale[sizeof(locale)]
 115   __attribute__ ((aligned(__alignof__(locale))));
 116   fake_locale c_locale;
 117
 118   typedef char fake_name_vec[sizeof(char*)]
 119   __attribute__ ((aligned(__alignof__(char*))));
 120   fake_name_vec name_vec[6 + _GLIBCPP_NUM_CATEGORIES];
 121
 122   typedef char fake_names[sizeof(char[2])]
 123   __attribute__ ((aligned(__alignof__(char[2]))));
 124   fake_names name_c[6 + _GLIBCPP_NUM_CATEGORIES];
 125
 126   typedef char fake_facet_vec[sizeof(locale::facet*)]
 127   __attribute__ ((aligned(__alignof__(locale::facet*))));
 128   fake_facet_vec facet_vec[_GLIBCPP_NUM_FACETS];
 129
 130   typedef char fake_ctype_c[sizeof(std::ctype<char>)]
 131   __attribute__ ((aligned(__alignof__(std::ctype<char>))));
 132   fake_ctype_c ctype_c;
 133
 134   typedef char fake_collate_c[sizeof(std::collate<char>)]
 135   __attribute__ ((aligned(__alignof__(std::collate<char>))));
 136   fake_collate_c collate_c;
 137
 138   typedef char fake_numpunct_c[sizeof(numpunct<char>)]
 139   __attribute__ ((aligned(__alignof__(numpunct<char>))));
 140   fake_numpunct_c numpunct_c;
 141
 142   typedef char fake_num_get_c[sizeof(num_get<char>)]
 143   __attribute__ ((aligned(__alignof__(num_get<char>))));
 144   fake_num_get_c num_get_c;
 145
 146   typedef char fake_num_put_c[sizeof(num_put<char>)]
 147   __attribute__ ((aligned(__alignof__(num_put<char>))));
 148   fake_num_put_c num_put_c;
 149
 150   typedef char fake_codecvt_c[sizeof(codecvt<char, char, mbstate_t>)]
 151   __attribute__ ((aligned(__alignof__(codecvt<char, char, mbstate_t>))));
 152   fake_codecvt_c codecvt_c;
 153
 154   typedef char fake_moneypunct_c[sizeof(moneypunct<char, true>)]
 155   __attribute__ ((aligned(__alignof__(moneypunct<char, true>))));
 156   fake_moneypunct_c moneypunct_tc;
 157   fake_moneypunct_c moneypunct_fc;
 158
 159   typedef char fake_money_get_c[sizeof(money_get<char>)]
 160   __attribute__ ((aligned(__alignof__(money_get<char>))));
 161   fake_money_get_c money_get_c;
 162
 163   typedef char fake_money_put_c[sizeof(money_put<char>)]
 164   __attribute__ ((aligned(__alignof__(money_put<char>))));
 165   fake_money_put_c money_put_c;
 166
 167   typedef char fake_timepunct_c[sizeof(__timepunct<char>)]
 168   __attribute__ ((aligned(__alignof__(__timepunct<char>))));
 169   fake_timepunct_c timepunct_c;
 170
 171   typedef char fake_time_get_c[sizeof(time_get<char>)]
 172   __attribute__ ((aligned(__alignof__(time_get<char>))));
 173   fake_time_get_c time_get_c;
 174
 175   typedef char fake_time_put_c[sizeof(time_put<char>)]
 176   __attribute__ ((aligned(__alignof__(time_put<char>))));
 177   fake_time_put_c time_put_c;
 178
 179   typedef char fake_messages_c[sizeof(messages<char>)]
 180   __attribute__ ((aligned(__alignof__(messages<char>))));
 181   fake_messages_c messages_c;
 182
 183 #ifdef  _GLIBCPP_USE_WCHAR_T
 184   typedef char fake_wtype_w[sizeof(std::ctype<wchar_t>)]
 185   __attribute__ ((aligned(__alignof__(std::ctype<wchar_t>))));
 186   fake_wtype_w ctype_w;
 187
 188   typedef char fake_wollate_w[sizeof(std::collate<wchar_t>)]
 189   __attribute__ ((aligned(__alignof__(std::collate<wchar_t>))));
 190   fake_wollate_w collate_w;
 191
 192   typedef char fake_numpunct_w[sizeof(numpunct<wchar_t>)]
 193   __attribute__ ((aligned(__alignof__(numpunct<wchar_t>))));
 194   fake_numpunct_w numpunct_w;
 195
 196   typedef char fake_num_get_w[sizeof(num_get<wchar_t>)]
 197   __attribute__ ((aligned(__alignof__(num_get<wchar_t>))));
 198   fake_num_get_w num_get_w;
 199
 200   typedef char fake_num_put_w[sizeof(num_put<wchar_t>)]
 201   __attribute__ ((aligned(__alignof__(num_put<wchar_t>))));
 202   fake_num_put_w num_put_w;
 203
 204   typedef char fake_wodecvt_w[sizeof(codecvt<wchar_t, char, mbstate_t>)]
 205   __attribute__ ((aligned(__alignof__(codecvt<wchar_t, char, mbstate_t>))));
 206   fake_wodecvt_w codecvt_w;
 207
 208   typedef char fake_moneypunct_w[sizeof(moneypunct<wchar_t, true>)]
 209   __attribute__ ((aligned(__alignof__(moneypunct<wchar_t, true>))));
 210   fake_moneypunct_w moneypunct_tw;
 211   fake_moneypunct_w moneypunct_fw;
 212
 213   typedef char fake_money_get_w[sizeof(money_get<wchar_t>)]
 214   __attribute__ ((aligned(__alignof__(money_get<wchar_t>))));
 215   fake_money_get_w money_get_w;
 216
 217   typedef char fake_money_put_w[sizeof(money_put<wchar_t>)]
 218   __attribute__ ((aligned(__alignof__(money_put<wchar_t>))));
 219   fake_money_put_w money_put_w;
 220
 221   typedef char fake_timepunct_w[sizeof(__timepunct<wchar_t>)]
 222   __attribute__ ((aligned(__alignof__(__timepunct<wchar_t>))));
 223   fake_timepunct_w timepunct_w;
 224
 225   typedef char fake_time_get_w[sizeof(time_get<wchar_t>)]
 226   __attribute__ ((aligned(__alignof__(time_get<wchar_t>))));
 227   fake_time_get_w time_get_w;
 228
 229   typedef char fake_time_put_w[sizeof(time_put<wchar_t>)]
 230   __attribute__ ((aligned(__alignof__(time_put<wchar_t>))));
 231   fake_time_put_w time_put_w;
 232
 233   typedef char fake_messages_w[sizeof(messages<wchar_t>)]
 234   __attribute__ ((aligned(__alignof__(messages<wchar_t>))));
 235   fake_messages_w messages_w;
 236 #endif
 237
 238   // Globals for once-only runtime initialization of mutex objects.  This
 239   // allows static initialization of these objects on systems that need a
 240   // function call to initialize a mutex.  For example, see stl_threads.h.
 241 #ifdef __GTHREAD_MUTEX_INIT
 242 #elif defined(__GTHREAD_MUTEX_INIT_FUNCTION)
 243   __gthread_once_t _GLIBCPP_once = __GTHREAD_ONCE_INIT;
 244   __gthread_mutex_t _GLIBCPP_mutex;
 245   __gthread_mutex_t *_GLIBCPP_mutex_address;
 246
 247   // Once-only initializer function for _GLIBCPP_mutex.
 248   void
 249   _GLIBCPP_mutex_init ()
 250   { __GTHREAD_MUTEX_INIT_FUNCTION (&_GLIBCPP_mutex); }
 251
 252   // Once-only initializer function for _GLIBCPP_mutex_address.
 253   void
 254   _GLIBCPP_mutex_address_init ()
 255   { __GTHREAD_MUTEX_INIT_FUNCTION (_GLIBCPP_mutex_address); }
 256 #endif
 257 } // namespace __gnu_cxx