sysdeps/standalone/filedesc.h

   1 /* Copyright (C) 1994 Free Software Foundation, Inc.
   2    Ported to standalone by Joel Sherrill jsherril@redstone-emh2.army.mil,
   3      On-Line Applications Research Corporation.
   4
   5 This file is part of the GNU C Library.
   6
   7 The GNU C Library is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU Library General Public License as
   9 published by the Free Software Foundation; either version 2 of the
  10 License, or (at your option) any later version.
  11
  12 The GNU C Library is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 Library General Public License for more details.
  16
  17 You should have received a copy of the GNU Library General Public
  18 License along with the GNU C Library; see the file COPYING.LIB.  If
  19 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  20 Cambridge, MA 02139, USA.  */
  21
  22 /*
  23  *  This is the file descriptor used by the no OS implementation
  24  *  of __open, __read, __write, and __close.
  25  */
  26
  27 #ifndef __FILEDESC_h
  28 #define __FILEDESC_h
  29
  30 #include <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