libio/stdfiles.c

   1 /*
   2 Copyright (C) 1993, 1994, 1996, 1997 Free Software Foundation
   3
   4 This file is part of the GNU IO Library.  This library is free
   5 software; you can redistribute it and/or modify it under the
   6 terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 This library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this library; see the file COPYING.  If not, write to the Free
  17 Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 As a special exception, if you link this library with files
  20 compiled with a GNU compiler to produce an executable, this does not cause
  21 the resulting executable to be covered by the GNU General Public License.
  22 This exception does not however invalidate any other reasons why
  23 the executable file might be covered by the GNU General Public License. */
  24
  25
  26 /* This file provides definitions of _IO_stdin, _IO_stdout, and _IO_stderr
  27    for C code.  Compare stdstreams.cc.
  28    (The difference is that here the vtable field is set to 0,
  29    so the objects defined are not valid C++ objects.  On the other
  30    hand, we don't need a C++ compiler to build this file.) */
  31
  32 #include "libioP.h"
  33
  34 #ifdef _IO_MTSAFE_IO
  35 #define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \
  36   static _IO_lock_t _IO_stdfile_##FD##_lock = _IO_lock_initializer; \
  37   struct _IO_FILE_plus NAME \
  38     = {FILEBUF_LITERAL(CHAIN, FLAGS, FD), &_IO_file_jumps}
  39 #else
  40 #define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \
  41   struct _IO_FILE_plus NAME \
  42     = {FILEBUF_LITERAL(CHAIN, FLAGS, FD), &_IO_file_jumps}
  43 #endif
  44
  45 DEF_STDFILE(_IO_stdin_, 0, 0, _IO_NO_WRITES);
  46 DEF_STDFILE(_IO_stdout_, 1, &_IO_stdin_.file, _IO_NO_READS);
  47 DEF_STDFILE(_IO_stderr_, 2, &_IO_stdout_.file,
  48             _IO_NO_READS+_IO_UNBUFFERED);
  49
  50 _IO_FILE *_IO_list_all = &_IO_stderr_.file;
  51
  52 #ifdef _G_USING_THUNKS
  53 #if defined(__GNUC__) && __GNUC__ >= 2
  54 const
  55 #endif
  56 int _libio_using_thunks = 1;
  57 #endif