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 /* File descriptor set emulation.  */
  25
  26 /* MSVC runtime library has limit of 64 descriptors by default */
  27 #define FD_SETSIZE  64
  28 typedef struct {
  29   unsigned int bits[FD_SETSIZE / 32];
  30 } fd_set;
  31
  32 /* standard access macros */
  33 #define FD_SET(n, p) \
  34   do { \
  35     if ((n) < FD_SETSIZE) { \
  36       (p)->bits[(n)/32] |= (1 << (n)%32); \
  37     } \
  38   } while (0)
  39 #define FD_CLR(n, p) \
  40   do { \
  41     if ((n) < FD_SETSIZE) { \
  42       (p)->bits[(n)/32] &= ~(1 << (n)%32); \
  43     } \
  44   } while (0)
  45 #define FD_ISSET(n, p) ((n) < FD_SETSIZE ? ((p)->bits[(n)/32] & (1 << (n)%32)) : 0)
  46 #define FD_ZERO(p) memset((p), 0, sizeof(fd_set))
  47
  48 #define SELECT_TYPE fd_set
  49
  50 /* ------------------------------------------------------------------------- */
  51
  52 /* child_process.status values */
  53 enum {
  54   STATUS_READ_ERROR = -1,
  55   STATUS_READ_READY,
  56   STATUS_READ_IN_PROGRESS,
  57   STATUS_READ_FAILED,
  58   STATUS_READ_SUCCEEDED,
  59   STATUS_READ_ACKNOWLEDGED
  60 };
  61
  62 /* This structure is used for both pipes and sockets; for
  63    a socket, the process handle in pi is NULL. */
  64 typedef struct _child_process
  65 {
  66   int                   fd;
  67   int                   pid;
  68   HANDLE                char_avail;
  69   HANDLE                char_consumed;
  70   HANDLE                thrd;
  71   HWND                  hwnd;
  72   PROCESS_INFORMATION   procinfo;
  73   volatile int          status;
  74   char                  chr;
  75 } child_process;
  76
  77 #define MAXDESC FD_SETSIZE
  78 #define MAX_CHILDREN  MAXDESC/2
  79 #define CHILD_ACTIVE(cp) ((cp)->char_avail != NULL)
  80
  81 /* parallel array of private info on file handles */
  82 typedef struct
  83 {
  84   unsigned         flags;
  85   HANDLE           hnd;
  86   child_process *  cp;
  87 } filedesc;
  88
  89 extern filedesc fd_info [ MAXDESC ];
  90
  91 /* fd_info flag definitions */
  92 #define FILE_READ               0x0001
  93 #define FILE_WRITE              0x0002
  94 #define FILE_BINARY             0x0010
  95 #define FILE_LAST_CR            0x0020
  96 #define FILE_AT_EOF             0x0040
  97 #define FILE_SEND_SIGCHLD       0x0080
  98 #define FILE_PIPE               0x0100
  99 #define FILE_SOCKET             0x0200
 100
 101 extern child_process * new_child (void);
 102 extern void delete_child (child_process *cp);
 103
 104 /* ------------------------------------------------------------------------- */
 105
 106 /* Get long (aka "true") form of file name, if it exists.  */
 107 extern BOOL w32_get_long_filename (char * name, char * buf, int size);
 108
 109 /* Prepare our standard handles for proper inheritance by child processes.  */
 110 extern void prepare_standard_handles (int in, int out,
 111                                       int err, HANDLE handles[4]);
 112
 113 /* Reset our standard handles to their original state.  */
 114 extern void reset_standard_handles (int in, int out,
 115                                     int err, HANDLE handles[4]);
 116
 117 /* Return the string resource associated with KEY of type TYPE.  */
 118 extern LPBYTE w32_get_resource (char * key, LPDWORD type);
 119
 120 extern void init_ntproc ();
 121 extern void term_ntproc ();
 122
 123 #endif /* _NT_H_ */