src/w32.h

   1 /* Support routines for the NT version of Emacs.
   2    Copyright (C) 1994 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs 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
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* File descriptor set emulation.  */
  22
  23 #ifdef FD_SET
  24 /* We could get this from param.h, but better not to depend on finding that.
  25    And better not to risk that it might define other symbols used in this
  26    file.  */
  27 #ifdef FD_SETSIZE
  28 #define MAXDESC FD_SETSIZE
  29 #else
  30 #define MAXDESC 64
  31 #endif
  32 #define SELECT_TYPE fd_set
  33 #else /* no FD_SET */
  34 #define MAXDESC 32
  35 #define SELECT_TYPE int
  36
  37 /* Define the macros to access a single-int bitmap of descriptors.  */
  38 #define FD_SET(n, p) (*(p) |= (1 << (n)))
  39 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
  40 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
  41 #define FD_ZERO(p) (*(p) = 0)
  42 #endif /* no FD_SET */
  43
  44 /* Prepare our standard handles for proper inheritance by child processes.  */
  45 extern void prepare_standard_handles (int in, int out,
  46                                       int err, HANDLE handles[4]);
  47
  48 /* Reset our standard handles to their original state.  */
  49 extern void reset_standard_handles (int in, int out,
  50                                     int err, HANDLE handles[4]);
  51
  52 /* Return the string resource associated with KEY of type TYPE.  */
  53 extern LPBYTE nt_get_resource (char *key, LPDWORD type);
  54