libstdc++-v3/src/globals.cc

   1 // Copyright (C) 2001, 2002 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
  36 // On AIX, and perhaps other systems, library initialization order is
  37 // not guaranteed.  For example, the static initializers for the main
  38 // program might run before the static initializers for this library.
  39 // That means that we cannot rely on static initialization in the
  40 // library; there is no guarantee that things will get initialized in
  41 // time.  This file contains definitions of all global variables that
  42 // require initialization as arrays of characters.
  43
  44 // Because <iostream> declares the standard streams to be [io]stream
  45 // types instead of say [io]fstream types, it is also necessary to
  46 // allocate the actual file buffers in this file.
  47 namespace __gnu_cxx
  48 {
  49   using namespace std;
  50
  51   typedef char fake_facet_name[sizeof(char*)]
  52   __attribute__ ((aligned(__alignof__(char*))));
  53   fake_facet_name facet_name[6 + _GLIBCPP_NUM_CATEGORIES];
  54
  55   typedef char fake_locale_Impl[sizeof(locale::_Impl)]
  56   __attribute__ ((aligned(__alignof__(locale::_Impl))));
  57   fake_locale_Impl c_locale_impl;
  58
  59
  60   // NB: The asm directives renames these non-exported, namespace
  61   // __gnu_cxx symbols into the mistakenly exported, namespace std
  62   // symbols in GLIBCPP_3.2.
  63   // The rename syntax is
  64   //   asm (".symver currentname,oldname@@GLIBCPP_3.2")
  65   // At the same time, these new __gnu_cxx symbols are not exported.
  66   // In the future, GLIBCXX_ABI > 5 should remove all uses of
  67   // _GLIBCPP_ASM_SYMVER in this file.
  68   typedef char fake_locale[sizeof(locale)]
  69   __attribute__ ((aligned(__alignof__(locale))));
  70   fake_locale c_locale;
  71   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx8c_localeE, _ZSt8c_locale, GLIBCPP_3.2)
  72
  73   // GLIBCXX_ABI > 5 will not need this symbol at all.
  74   // It's here just as a placeholder, as the size of this exported
  75   // object changed. The new symbol is not exported.
  76   const int o = sizeof(locale::_Impl) - sizeof(char*[_GLIBCPP_NUM_CATEGORIES]);
  77   typedef char fake_locale_Impl_compat[o]
  78   __attribute__ ((aligned(__alignof__(o))));
  79   fake_locale_Impl_compat  c_locale_impl_compat;
  80   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx20c_locale_impl_compatE, _ZSt13c_locale_impl, GLIBCPP_3.2)
  81
  82   typedef char fake_facet_vec[sizeof(locale::facet*)]
  83   __attribute__ ((aligned(__alignof__(locale::facet*))));
  84   fake_facet_vec facet_vec[_GLIBCPP_NUM_FACETS];
  85   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9facet_vecE, _ZSt9facet_vec, GLIBCPP_3.2)
  86
  87   typedef char fake_ctype_c[sizeof(std::ctype<char>)]
  88   __attribute__ ((aligned(__alignof__(std::ctype<char>))));
  89   fake_ctype_c ctype_c;
  90   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx7ctype_cE, _ZSt7ctype_c, GLIBCPP_3.2)
  91
  92   typedef char fake_collate_c[sizeof(std::collate<char>)]
  93   __attribute__ ((aligned(__alignof__(std::collate<char>))));
  94   fake_collate_c collate_c;
  95   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9collate_cE, _ZSt9collate_c, GLIBCPP_3.2)
  96
  97   typedef char fake_numpunct_c[sizeof(numpunct<char>)]
  98   __attribute__ ((aligned(__alignof__(numpunct<char>))));
  99   fake_numpunct_c numpunct_c;
 100   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx10numpunct_cE, _ZSt10numpunct_c, GLIBCPP_3.2)
 101
 102   typedef char fake_num_get_c[sizeof(num_get<char>)]
 103   __attribute__ ((aligned(__alignof__(num_get<char>))));
 104   fake_num_get_c num_get_c;
 105   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9num_get_cE, _ZSt9num_get_c, GLIBCPP_3.2)
 106
 107   typedef char fake_num_put_c[sizeof(num_put<char>)]
 108   __attribute__ ((aligned(__alignof__(num_put<char>))));
 109   fake_num_put_c num_put_c;
 110   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9num_put_cE, _ZSt9num_put_c, GLIBCPP_3.2)
 111
 112   typedef char fake_codecvt_c[sizeof(codecvt<char, char, mbstate_t>)]
 113   __attribute__ ((aligned(__alignof__(codecvt<char, char, mbstate_t>))));
 114   fake_codecvt_c codecvt_c;
 115   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9codecvt_cE, _ZSt9codecvt_c, GLIBCPP_3.2)
 116
 117   typedef char fake_moneypunct_c[sizeof(moneypunct<char, true>)]
 118   __attribute__ ((aligned(__alignof__(moneypunct<char, true>))));
 119   fake_moneypunct_c moneypunct_tc;
 120   fake_moneypunct_c moneypunct_fc;
 121   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx13moneypunct_tcE,\
 122         _ZSt13moneypunct_tc, GLIBCPP_3.2)
 123   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx13moneypunct_fcE,\
 124         _ZSt13moneypunct_fc, GLIBCPP_3.2)
 125
 126   typedef char fake_money_get_c[sizeof(money_get<char>)]
 127   __attribute__ ((aligned(__alignof__(money_get<char>))));
 128   fake_money_get_c money_get_c;
 129   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx11money_get_cE, _ZSt11money_get_c, GLIBCPP_3.2)
 130
 131   typedef char fake_money_put_c[sizeof(money_put<char>)]
 132   __attribute__ ((aligned(__alignof__(money_put<char>))));
 133   fake_money_put_c money_put_c;
 134   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx11money_put_cE, _ZSt11money_put_c, GLIBCPP_3.2)
 135
 136   typedef char fake_timepunct_c[sizeof(__timepunct<char>)]
 137   __attribute__ ((aligned(__alignof__(__timepunct<char>))));
 138   fake_timepunct_c timepunct_c;
 139   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx11timepunct_cE, _ZSt11timepunct_c, GLIBCPP_3.2)
 140
 141   typedef char fake_time_get_c[sizeof(time_get<char>)]
 142   __attribute__ ((aligned(__alignof__(time_get<char>))));
 143   fake_time_get_c time_get_c;
 144   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx10time_get_cE, _ZSt10time_get_c, GLIBCPP_3.2)
 145
 146   typedef char fake_time_put_c[sizeof(time_put<char>)]
 147   __attribute__ ((aligned(__alignof__(time_put<char>))));
 148   fake_time_put_c time_put_c;
 149   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx10time_put_cE, _ZSt10time_put_c, GLIBCPP_3.2)
 150
 151   typedef char fake_messages_c[sizeof(messages<char>)]
 152   __attribute__ ((aligned(__alignof__(messages<char>))));
 153   fake_messages_c messages_c;
 154   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx10messages_cE, _ZSt10messages_c, GLIBCPP_3.2)
 155
 156 #ifdef  _GLIBCPP_USE_WCHAR_T
 157   typedef char fake_wtype_w[sizeof(std::ctype<wchar_t>)]
 158   __attribute__ ((aligned(__alignof__(std::ctype<wchar_t>))));
 159   fake_wtype_w ctype_w;
 160   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx7ctype_wE, _ZSt7ctype_w, GLIBCPP_3.2)
 161
 162   typedef char fake_wollate_w[sizeof(std::collate<wchar_t>)]
 163   __attribute__ ((aligned(__alignof__(std::collate<wchar_t>))));
 164   fake_wollate_w collate_w;
 165   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9collate_wE, _ZSt9collate_w, GLIBCPP_3.2)
 166
 167   typedef char fake_numpunct_w[sizeof(numpunct<wchar_t>)]
 168   __attribute__ ((aligned(__alignof__(numpunct<wchar_t>))));
 169   fake_numpunct_w numpunct_w;
 170   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx10numpunct_wE, _ZSt10numpunct_w, GLIBCPP_3.2)
 171
 172   typedef char fake_num_get_w[sizeof(num_get<wchar_t>)]
 173   __attribute__ ((aligned(__alignof__(num_get<wchar_t>))));
 174   fake_num_get_w num_get_w;
 175   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9num_get_wE, _ZSt9num_get_w, GLIBCPP_3.2)
 176
 177   typedef char fake_num_put_w[sizeof(num_put<wchar_t>)]
 178   __attribute__ ((aligned(__alignof__(num_put<wchar_t>))));
 179   fake_num_put_w num_put_w;
 180   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9num_put_wE, _ZSt9num_put_w, GLIBCPP_3.2)
 181
 182   typedef char fake_wodecvt_w[sizeof(codecvt<wchar_t, char, mbstate_t>)]
 183   __attribute__ ((aligned(__alignof__(codecvt<wchar_t, char, mbstate_t>))));
 184   fake_wodecvt_w codecvt_w;
 185   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9codecvt_wE, _ZSt9codecvt_w, GLIBCPP_3.2)
 186
 187   typedef char fake_moneypunct_w[sizeof(moneypunct<wchar_t, true>)]
 188   __attribute__ ((aligned(__alignof__(moneypunct<wchar_t, true>))));
 189   fake_moneypunct_w moneypunct_tw;
 190   fake_moneypunct_w moneypunct_fw;
 191   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx13moneypunct_twE,\
 192         _ZSt13moneypunct_tw, GLIBCPP_3.2)
 193   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx13moneypunct_fwE,\
 194         _ZSt13moneypunct_fw, GLIBCPP_3.2)
 195
 196   typedef char fake_money_get_w[sizeof(money_get<wchar_t>)]
 197   __attribute__ ((aligned(__alignof__(money_get<wchar_t>))));
 198   fake_money_get_w money_get_w;
 199   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx11money_get_wE, _ZSt11money_get_w, GLIBCPP_3.2)
 200
 201   typedef char fake_money_put_w[sizeof(money_put<wchar_t>)]
 202   __attribute__ ((aligned(__alignof__(money_put<wchar_t>))));
 203   fake_money_put_w money_put_w;
 204   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx11money_put_wE, _ZSt11money_put_w, GLIBCPP_3.2)
 205
 206   typedef char fake_timepunct_w[sizeof(__timepunct<wchar_t>)]
 207   __attribute__ ((aligned(__alignof__(__timepunct<wchar_t>))));
 208   fake_timepunct_w timepunct_w;
 209   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx11timepunct_wE, _ZSt11timepunct_w, GLIBCPP_3.2)
 210
 211   typedef char fake_time_get_w[sizeof(time_get<wchar_t>)]
 212   __attribute__ ((aligned(__alignof__(time_get<wchar_t>))));
 213   fake_time_get_w time_get_w;
 214   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx10time_get_wE, _ZSt10time_get_w, GLIBCPP_3.2)
 215
 216   typedef char fake_time_put_w[sizeof(time_put<wchar_t>)]
 217   __attribute__ ((aligned(__alignof__(time_put<wchar_t>))));
 218   fake_time_put_w time_put_w;
 219   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx10time_put_wE, _ZSt10time_put_w, GLIBCPP_3.2)
 220
 221   typedef char fake_messages_w[sizeof(messages<wchar_t>)]
 222   __attribute__ ((aligned(__alignof__(messages<wchar_t>))));
 223   fake_messages_w messages_w;
 224   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx10messages_wE, _ZSt10messages_w, GLIBCPP_3.2)
 225 #endif
 226
 227   typedef char fake_filebuf[sizeof(stdio_filebuf<char>)]
 228   __attribute__ ((aligned(__alignof__(stdio_filebuf<char>))));
 229   fake_filebuf buf_cout;
 230   fake_filebuf buf_cin;
 231   fake_filebuf buf_cerr;
 232   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx8buf_coutE, _ZSt8buf_cout, GLIBCPP_3.2)
 233   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx7buf_cinE, _ZSt7buf_cin, GLIBCPP_3.2)
 234   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx8buf_cerrE, _ZSt8buf_cerr, GLIBCPP_3.2)
 235
 236 #ifdef _GLIBCPP_USE_WCHAR_T
 237   typedef char fake_wfilebuf[sizeof(stdio_filebuf<wchar_t>)]
 238   __attribute__ ((aligned(__alignof__(stdio_filebuf<wchar_t>))));
 239   fake_wfilebuf buf_wcout;
 240   fake_wfilebuf buf_wcin;
 241   fake_wfilebuf buf_wcerr;
 242   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9buf_wcoutE, _ZSt9buf_wcout, GLIBCPP_3.2)
 243   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx8buf_wcinE, _ZSt8buf_wcin, GLIBCPP_3.2)
 244   _GLIBCPP_ASM_SYMVER(_ZN9__gnu_cxx9buf_wcerrE, _ZSt9buf_wcerr, GLIBCPP_3.2)
 245 #endif
 246
 247   // Globals for once-only runtime initialization of mutex objects.  This
 248   // allows static initialization of these objects on systems that need a
 249   // function call to initialize a mutex.  For example, see stl_threads.h.
 250 #ifdef __GTHREAD_MUTEX_INIT
 251   // Need to provide explicit instantiations of static data for
 252   // systems with broken weak linkage support.
 253   template __gthread_mutex_t _Swap_lock_struct<0>::_S_swap_lock;
 254 #elif defined(__GTHREAD_MUTEX_INIT_FUNCTION)
 255   __gthread_once_t _GLIBCPP_once = __GTHREAD_ONCE_INIT;
 256   __gthread_mutex_t _GLIBCPP_mutex;
 257   __gthread_mutex_t *_GLIBCPP_mutex_address;
 258
 259   // Once-only initializer function for _GLIBCPP_mutex.
 260   void
 261   _GLIBCPP_mutex_init ()
 262   { __GTHREAD_MUTEX_INIT_FUNCTION (&_GLIBCPP_mutex); }
 263
 264   // Once-only initializer function for _GLIBCPP_mutex_address.
 265   void
 266   _GLIBCPP_mutex_address_init ()
 267   { __GTHREAD_MUTEX_INIT_FUNCTION (_GLIBCPP_mutex_address); }
 268 #endif
 269 } // namespace __gnu_cxx
 270
 271 namespace std
 272 {
 273   // Standard stream objects.
 274   typedef char fake_istream[sizeof(istream)]
 275   __attribute__ ((aligned(__alignof__(istream))));
 276   typedef char fake_ostream[sizeof(ostream)]
 277   __attribute__ ((aligned(__alignof__(ostream))));
 278   fake_istream cin;
 279   fake_ostream cout;
 280   fake_ostream cerr;
 281   fake_ostream clog;
 282
 283 #ifdef _GLIBCPP_USE_WCHAR_T
 284   typedef char fake_wistream[sizeof(wistream)]
 285   __attribute__ ((aligned(__alignof__(wistream))));
 286   typedef char fake_wostream[sizeof(wostream)]
 287   __attribute__ ((aligned(__alignof__(wostream))));
 288   fake_wistream wcin;
 289   fake_wostream wcout;
 290   fake_wostream wcerr;
 291   fake_wostream wclog;
 292 #endif
 293 } // namespace std