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, 2001-2011  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
  23 /* File descriptor set emulation.  */
  24
  25 /* MSVC runtime library has limit of 64 descriptors by default */
  26 #define FD_SETSIZE  64
  27 typedef struct {
  28   unsigned int bits[FD_SETSIZE / 32];
  29 } fd_set;
  30
  31 /* standard access macros */
  32 #define FD_SET(n, p) \
  33   do { \
  34     if ((n) < FD_SETSIZE) { \
  35       (p)->bits[(n)/32] |= (1 << (n)%32); \
  36     } \
  37   } while (0)
  38 #define FD_CLR(n, p) \
  39   do { \
  40     if ((n) < FD_SETSIZE) { \
  41       (p)->bits[(n)/32] &= ~(1 << (n)%32); \
  42     } \
  43   } while (0)
  44 #define FD_ISSET(n, p) ((n) < FD_SETSIZE ? ((p)->bits[(n)/32] & (1 << (n)%32)) : 0)
  45 #define FD_ZERO(p) memset((p), 0, sizeof(fd_set))
  46
  47 #define SELECT_TYPE fd_set
  48
  49 /* ------------------------------------------------------------------------- */
  50
  51 /* child_process.status values */
  52 enum {
  53   STATUS_READ_ERROR = -1,
  54   STATUS_READ_READY,
  55   STATUS_READ_IN_PROGRESS,
  56   STATUS_READ_FAILED,
  57   STATUS_READ_SUCCEEDED,
  58   STATUS_READ_ACKNOWLEDGED
  59 };
  60
  61 /* This structure is used for both pipes and sockets; for
  62    a socket, the process handle in pi is NULL. */
  63 typedef struct _child_process
  64 {
  65   int                   fd;
  66   int                   pid;
  67   HANDLE                char_avail;
  68   HANDLE                char_consumed;
  69   HANDLE                thrd;
  70   HWND                  hwnd;
  71   PROCESS_INFORMATION   procinfo;
  72   volatile int          status;
  73   char                  chr;
  74   OVERLAPPED            ovl_read;
  75   OVERLAPPED            ovl_write;
  76 } child_process;
  77
  78 #define MAXDESC FD_SETSIZE
  79 #define MAX_CHILDREN  MAXDESC/2
  80 #define CHILD_ACTIVE(cp) ((cp)->char_avail != NULL)
  81
  82 /* parallel array of private info on file handles */
  83 typedef struct
  84 {
  85   unsigned         flags;
  86   HANDLE           hnd;
  87   child_process *  cp;
  88 } filedesc;
  89
  90 extern filedesc fd_info [ MAXDESC ];
  91
  92 /* fd_info flag definitions */
  93 #define FILE_READ               0x0001
  94 #define FILE_WRITE              0x0002
  95 #define FILE_LISTEN             0x0004
  96 #define FILE_BINARY             0x0010
  97 #define FILE_LAST_CR            0x0020
  98 #define FILE_AT_EOF             0x0040
  99 #define FILE_SEND_SIGCHLD       0x0080
 100 #define FILE_PIPE               0x0100
 101 #define FILE_SOCKET             0x0200
 102 #define FILE_NDELAY             0x0400
 103 #define FILE_SERIAL             0x0800
 104
 105 extern child_process * new_child (void);
 106 extern void delete_child (child_process *cp);
 107
 108 /* ------------------------------------------------------------------------- */
 109
 110 /* Equivalent of strerror for W32 error codes.  */
 111 extern char * w32_strerror (int error_no);
 112
 113 /* Validate a pointer.  */
 114 extern int w32_valid_pointer_p (void *, int);
 115
 116 /* Get long (aka "true") form of file name, if it exists.  */
 117 extern BOOL w32_get_long_filename (char * name, char * buf, int size);
 118
 119 /* Prepare our standard handles for proper inheritance by child processes.  */
 120 extern void prepare_standard_handles (int in, int out,
 121                                       int err, HANDLE handles[4]);
 122
 123 /* Reset our standard handles to their original state.  */
 124 extern void reset_standard_handles (int in, int out,
 125                                     int err, HANDLE handles[4]);
 126
 127 /* Return the string resource associated with KEY of type TYPE.  */
 128 extern LPBYTE w32_get_resource (char * key, LPDWORD type);
 129
 130 extern void init_ntproc (void);
 131 extern void term_ntproc (void);
 132 extern void globals_of_w32 (void);
 133 extern void syms_of_w32term (void);
 134 extern void syms_of_w32fns (void);
 135 extern void globals_of_w32fns (void);
 136 extern void syms_of_w32select (void);
 137 extern void globals_of_w32select (void);
 138 extern void term_w32select (void);
 139 extern void syms_of_w32menu (void);
 140 extern void globals_of_w32menu (void);
 141 extern void syms_of_fontset (void);
 142
 143 extern int _sys_read_ahead (int fd);
 144 extern int _sys_wait_accept (int fd);
 145
 146 extern Lisp_Object Vlibrary_cache, QCloaded_from;
 147 extern HMODULE w32_delayed_load (Lisp_Object, Lisp_Object);
 148
 149 #ifdef HAVE_GNUTLS
 150 #include <gnutls/gnutls.h>
 151
 152 /* GnuTLS pull (read from remote) interface.  */
 153 extern ssize_t emacs_gnutls_pull (gnutls_transport_ptr_t p,
 154                                   void* buf, size_t sz);
 155
 156 /* GnuTLS push (write to remote) interface.  */
 157 extern ssize_t emacs_gnutls_push (gnutls_transport_ptr_t p,
 158                                   const void* buf, size_t sz);
 159 #endif /* HAVE_GNUTLS */
 160
 161 #endif /* EMACS_W32_H */
 162