src/w32.h

   1 #ifndef _NT_H_
   2 #define _NT_H_
   3
   4 /* Support routines for the NT version of Emacs.
   5    Copyright (C) 1994 Free Software Foundation, Inc.
   6
   7 This file is part of GNU Emacs.
   8
   9 GNU Emacs is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU Emacs is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU Emacs; see the file COPYING.  If not, write to
  21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 /* #define FULL_DEBUG */
  25 #define EMACSDEBUG
  26
  27 #ifdef EMACSDEBUG
  28 #define DebPrint(stuff) _DebPrint stuff
  29 #else
  30 #define DebPrint(stuff)
  31 #endif
  32
  33 /* File descriptor set emulation.  */
  34
  35 /* MSVC runtime library has limit of 64 descriptors by default */
  36 #define FD_SETSIZE  64
  37 typedef struct {
  38   unsigned int bits[FD_SETSIZE / 32];
  39 } fd_set;
  40
  41 /* standard access macros */
  42 #define FD_SET(n, p) \
  43   do { \
  44     if ((n) < FD_SETSIZE) { \
  45       (p)->bits[(n)/32] |= (1 << (n)%32); \
  46     } \
  47   } while (0)
  48 #define FD_CLR(n, p) \
  49   do { \
  50     if ((n) < FD_SETSIZE) { \
  51       (p)->bits[(n)/32] &= ~(1 << (n)%32); \
  52     } \
  53   } while (0)
  54 #define FD_ISSET(n, p) ((n) < FD_SETSIZE ? ((p)->bits[(n)/32] & (1 << (n)%32)) : 0)
  55 #define FD_ZERO(p) memset((p), 0, sizeof(fd_set))
  56
  57 #define SELECT_TYPE fd_set
  58
  59 /* ------------------------------------------------------------------------- */
  60
  61 /* child_process.status values */
  62 enum {
  63   STATUS_READ_ERROR = -1,
  64   STATUS_READ_READY,
  65   STATUS_READ_IN_PROGRESS,
  66   STATUS_READ_FAILED,
  67   STATUS_READ_SUCCEEDED,
  68   STATUS_READ_ACKNOWLEDGED
  69 };
  70
  71 /* This structure is used for both pipes and sockets; for
  72    a socket, the process handle in pi is NULL. */
  73 typedef struct _child_process
  74 {
  75   int                   fd;
  76   int                   pid;
  77   int                   is_dos_process;
  78   HANDLE                char_avail;
  79   HANDLE                char_consumed;
  80   HANDLE                thrd;
  81   PROCESS_INFORMATION   procinfo;
  82   volatile int          status;
  83   char                  chr;
  84 } child_process;
  85
  86 #define MAXDESC FD_SETSIZE
  87 #define MAX_CHILDREN  MAXDESC/2
  88 #define CHILD_ACTIVE(cp) ((cp)->char_avail != NULL)
  89
  90 /* parallel array of private info on file handles */
  91 typedef struct
  92 {
  93   unsigned         flags;
  94   HANDLE           hnd;
  95   child_process *  cp;
  96 } filedesc;
  97
  98 extern filedesc fd_info [ MAXDESC ];
  99
 100 /* fd_info flag definitions */
 101 #define FILE_READ    0x0001
 102 #define FILE_WRITE   0x0002
 103 #define FILE_BINARY  0x0010
 104 #define FILE_PIPE    0x0100
 105 #define FILE_SOCKET  0x0200
 106
 107 extern child_process * new_child (void);
 108 extern void delete_child (child_process *cp);
 109
 110 /* ------------------------------------------------------------------------- */
 111
 112
 113 /* Prepare our standard handles for proper inheritance by child processes.  */
 114 extern void prepare_standard_handles (int in, int out,
 115                                       int err, HANDLE handles[4]);
 116
 117 /* Reset our standard handles to their original state.  */
 118 extern void reset_standard_handles (int in, int out,
 119                                     int err, HANDLE handles[4]);
 120
 121 /* Return the string resource associated with KEY of type TYPE.  */
 122 extern LPBYTE nt_get_resource (char * key, LPDWORD type);
 123
 124 extern void init_ntproc ();
 125 extern void term_ntproc ();
 126
 127 #endif /* _NT_H_ */