sysdeps/standalone/filedesc.h

   1 /* Copyright (C) 1994, 1997, 1998 Free Software Foundation, Inc.
   2    Ported to standalone by Joel Sherrill jsherril@redstone-emh2.army.mil,
   3      On-Line Applications Research Corporation.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 /*
  22  *  This is the file descriptor used by the no OS implementation
  23  *  of __open, __read, __write, and __close.
  24  */
  25
  26 #ifndef __FILEDESC_h
  27 #define __FILEDESC_h
  28
  29 #define __need_FOPEN_MAX
  30 #include <bits/stdio_lim.h>
  31
  32 #ifndef __DECLARE_FILE_DESCRIPTORS__
  33 #define FILEDESC_EXTERN extern
  34 #else
  35 #define FILEDESC_EXTERN
  36 #endif
  37
  38 typedef struct {
  39   int  in_use;         /* 1 if in use, 0 otherwise */
  40   int  flags;          /* Flags from open */
  41 }   __no_os_file_descriptor;
  42
  43 #define __FD_Is_valid( _fd ) \
  44   ( (_fd) >= 0 && (_fd) < FOPEN_MAX )
  45
  46 FILEDESC_EXTERN __no_os_file_descriptor __FD_Table[ FOPEN_MAX ];
  47
  48 #endif