src/w32.h

   1 #ifndef EMACS_W32_H
   2 #define EMACS_W32_H
   3
   4 /* Support routines for the NT version of Emacs.
   5    Copyright (C) 1994, 2001, 2002, 2003, 2004, 2005,
   6                  2006, 2007, 2008, 2009, 2010, 2011  Free Software Foundation, Inc.
   7
   8 This file is part of GNU Emacs.
   9
  10 GNU Emacs is free software: you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation, either version 3 of the License, or
  13 (at your option) any later version.
  14
  15 GNU Emacs is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  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   OVERLAPPED            ovl_read;
  76   OVERLAPPED            ovl_write;
  77 } child_process;
  78
  79 #define MAXDESC FD_SETSIZE
  80 #define MAX_CHILDREN  MAXDESC/2
  81 #define CHILD_ACTIVE(cp) ((cp)->char_avail != NULL)
  82
  83 /* parallel array of private info on file handles */
  84 typedef struct
  85 {
  86   unsigned         flags;
  87   HANDLE           hnd;
  88   child_process *  cp;
  89 } filedesc;
  90
  91 extern filedesc fd_info [ MAXDESC ];
  92
  93 /* fd_info flag definitions */
  94 #define FILE_READ               0x0001
  95 #define FILE_WRITE              0x0002
  96 #define FILE_LISTEN             0x0004
  97 #define FILE_BINARY             0x0010
  98 #define FILE_LAST_CR            0x0020
  99 #define FILE_AT_EOF             0x0040
 100 #define FILE_SEND_SIGCHLD       0x0080
 101 #define FILE_PIPE               0x0100
 102 #define FILE_SOCKET             0x0200
 103 #define FILE_NDELAY             0x0400
 104 #define FILE_SERIAL             0x0800
 105
 106 extern child_process * new_child (void);
 107 extern void delete_child (child_process *cp);
 108
 109 /* ------------------------------------------------------------------------- */
 110
 111 /* Equivalent of strerror for W32 error codes.  */
 112 extern char * w32_strerror (int error_no);
 113
 114 /* Validate a pointer.  */
 115 extern int w32_valid_pointer_p (void *, int);
 116
 117 /* Get long (aka "true") form of file name, if it exists.  */
 118 extern BOOL w32_get_long_filename (char * name, char * buf, int size);
 119
 120 /* Prepare our standard handles for proper inheritance by child processes.  */
 121 extern void prepare_standard_handles (int in, int out,
 122                                       int err, HANDLE handles[4]);
 123
 124 /* Reset our standard handles to their original state.  */
 125 extern void reset_standard_handles (int in, int out,
 126                                     int err, HANDLE handles[4]);
 127
 128 /* Return the string resource associated with KEY of type TYPE.  */
 129 extern LPBYTE w32_get_resource (char * key, LPDWORD type);
 130
 131 extern void init_ntproc (void);
 132 extern void term_ntproc (void);
 133 extern void globals_of_w32 (void);
 134 extern void syms_of_w32term (void);
 135 extern void syms_of_w32fns (void);
 136 extern void globals_of_w32fns (void);
 137 extern void syms_of_w32select (void);
 138 extern void globals_of_w32select (void);
 139 extern void term_w32select (void);
 140 extern void syms_of_w32menu (void);
 141 extern void globals_of_w32menu (void);
 142 extern void syms_of_fontset (void);
 143
 144 extern int _sys_read_ahead (int fd);
 145 extern int _sys_wait_accept (int fd);
 146
 147 #endif /* EMACS_W32_H */
 148