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, 2001-2012  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 3 of the License, or
  12 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #ifdef CYGWIN
  23 #error "w32.h is not compatible with Cygwin"
  24 #endif
  25
  26 #include <windows.h>
  27
  28
  29 /* File descriptor set emulation.  */
  30
  31 /* MSVC runtime library has limit of 64 descriptors by default */
  32 #define FD_SETSIZE  64
  33 typedef struct {
  34   unsigned int bits[FD_SETSIZE / 32];
  35 } fd_set;
  36
  37 /* standard access macros */
  38 #define FD_SET(n, p) \
  39   do { \
  40     if ((n) < FD_SETSIZE) { \
  41       (p)->bits[(n)/32] |= (1 << (n)%32); \
  42     } \
  43   } while (0)
  44 #define FD_CLR(n, p) \
  45   do { \
  46     if ((n) < FD_SETSIZE) { \
  47       (p)->bits[(n)/32] &= ~(1 << (n)%32); \
  48     } \
  49   } while (0)
  50 #define FD_ISSET(n, p) ((n) < FD_SETSIZE ? ((p)->bits[(n)/32] & (1 << (n)%32)) : 0)
  51 #define FD_ZERO(p) memset((p), 0, sizeof(fd_set))
  52
  53 #define SELECT_TYPE fd_set
  54
  55 /* ------------------------------------------------------------------------- */
  56
  57 /* child_process.status values */
  58 enum {
  59   STATUS_READ_ERROR = -1,
  60   STATUS_READ_READY,
  61   STATUS_READ_IN_PROGRESS,
  62   STATUS_READ_FAILED,
  63   STATUS_READ_SUCCEEDED,
  64   STATUS_READ_ACKNOWLEDGED
  65 };
  66
  67 /* This structure is used for both pipes and sockets; for
  68    a socket, the process handle in pi is NULL. */
  69 typedef struct _child_process
  70 {
  71   int                   fd;
  72   int                   pid;
  73   HANDLE                char_avail;
  74   HANDLE                char_consumed;
  75   HANDLE                thrd;
  76   HWND                  hwnd;
  77   PROCESS_INFORMATION   procinfo;
  78   volatile int          status;
  79   char                  chr;
  80   OVERLAPPED            ovl_read;
  81   OVERLAPPED            ovl_write;
  82 } child_process;
  83
  84 #define MAXDESC FD_SETSIZE
  85 #define MAX_CHILDREN  MAXDESC/2
  86 #define CHILD_ACTIVE(cp) ((cp)->char_avail != NULL)
  87
  88 /* parallel array of private info on file handles */
  89 typedef struct
  90 {
  91   unsigned         flags;
  92   HANDLE           hnd;
  93   child_process *  cp;
  94 } filedesc;
  95
  96 extern filedesc fd_info [ MAXDESC ];
  97
  98 /* fd_info flag definitions */
  99 #define FILE_READ               0x0001
 100 #define FILE_WRITE              0x0002
 101 #define FILE_LISTEN             0x0004
 102 #define FILE_BINARY             0x0010
 103 #define FILE_LAST_CR            0x0020
 104 #define FILE_AT_EOF             0x0040
 105 #define FILE_SEND_SIGCHLD       0x0080
 106 #define FILE_PIPE               0x0100
 107 #define FILE_SOCKET             0x0200
 108 #define FILE_NDELAY             0x0400
 109 #define FILE_SERIAL             0x0800
 110
 111 extern child_process * new_child (void);
 112 extern void delete_child (child_process *cp);
 113
 114 /* ------------------------------------------------------------------------- */
 115
 116 /* Equivalent of strerror for W32 error codes.  */
 117 extern char * w32_strerror (int error_no);
 118
 119 /* Validate a pointer.  */
 120 extern int w32_valid_pointer_p (void *, int);
 121
 122 /* Get long (aka "true") form of file name, if it exists.  */
 123 extern BOOL w32_get_long_filename (char * name, char * buf, int size);
 124
 125 /* Prepare our standard handles for proper inheritance by child processes.  */
 126 extern void prepare_standard_handles (int in, int out,
 127                                       int err, HANDLE handles[4]);
 128
 129 /* Reset our standard handles to their original state.  */
 130 extern void reset_standard_handles (int in, int out,
 131                                     int err, HANDLE handles[4]);
 132
 133 /* Return the string resource associated with KEY of type TYPE.  */
 134 extern LPBYTE w32_get_resource (char * key, LPDWORD type);
 135
 136 extern void init_ntproc (int);
 137 extern void term_ntproc (int);
 138 extern void globals_of_w32 (void);
 139
 140 extern void term_timers (void);
 141 extern void init_timers (void);
 142
 143 extern int _sys_read_ahead (int fd);
 144 extern int _sys_wait_accept (int fd);
 145
 146 extern Lisp_Object QCloaded_from;
 147 extern HMODULE w32_delayed_load (Lisp_Object);
 148
 149 extern void init_environment (char **);
 150 extern void check_windows_init_file (void);
 151 extern void syms_of_ntproc (void);
 152 extern void syms_of_ntterm (void);
 153 extern void dostounix_filename (register char *);
 154 extern void unixtodos_filename (register char *);
 155 extern BOOL init_winsock (int load_now);
 156 extern void srandom (int);
 157 extern int random (void);
 158
 159 extern int sys_pipe (int *);
 160
 161 extern void set_process_dir (char *);
 162 extern int sys_spawnve (int, char *, char **, char **);
 163 extern void register_child (int, int);
 164
 165 extern void sys_sleep (int);
 166 extern char *getwd (char *);
 167 extern int sys_link (const char *, const char *);
 168
 169
 170
 171 #ifdef HAVE_GNUTLS
 172 #include <gnutls/gnutls.h>
 173
 174 /* GnuTLS pull (read from remote) interface.  */
 175 extern ssize_t emacs_gnutls_pull (gnutls_transport_ptr_t p,
 176                                   void* buf, size_t sz);
 177
 178 /* GnuTLS push (write to remote) interface.  */
 179 extern ssize_t emacs_gnutls_push (gnutls_transport_ptr_t p,
 180                                   const void* buf, size_t sz);
 181 #endif /* HAVE_GNUTLS */
 182
 183 #endif /* EMACS_W32_H */
 184