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  Free Software Foundation, Inc.
7
8This file is part of GNU Emacs.
9
10GNU Emacs is free software; you can redistribute it and/or modify
11it under the terms of the GNU General Public License as published by
12the Free Software Foundation; either version 2, or (at your option)
13any later version.
14
15GNU Emacs is distributed in the hope that it will be useful,
16but WITHOUT ANY WARRANTY; without even the implied warranty of
17MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18GNU General Public License for more details.
19
20You should have received a copy of the GNU General Public License
21along with GNU Emacs; see the file COPYING.  If not, write to
22the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23Boston, MA 02110-1301, USA.  */
24
25
26/* File descriptor set emulation.  */
27
28/* MSVC runtime library has limit of 64 descriptors by default */
29#define FD_SETSIZE  64
30typedef struct {
31  unsigned int bits[FD_SETSIZE / 32];
32} fd_set;
33
34/* standard access macros */
35#define FD_SET(n, p) \
36  do { \
37    if ((n) < FD_SETSIZE) { \
38      (p)->bits[(n)/32] |= (1 << (n)%32); \
39    } \
40  } while (0)
41#define FD_CLR(n, p) \
42  do { \
43    if ((n) < FD_SETSIZE) { \
44      (p)->bits[(n)/32] &= ~(1 << (n)%32); \
45    } \
46  } while (0)
47#define FD_ISSET(n, p) ((n) < FD_SETSIZE ? ((p)->bits[(n)/32] & (1 << (n)%32)) : 0)
48#define FD_ZERO(p) memset((p), 0, sizeof(fd_set))
49
50#define SELECT_TYPE fd_set
51
52/* ------------------------------------------------------------------------- */
53
54/* child_process.status values */
55enum {
56  STATUS_READ_ERROR = -1,
57  STATUS_READ_READY,
58  STATUS_READ_IN_PROGRESS,
59  STATUS_READ_FAILED,
60  STATUS_READ_SUCCEEDED,
61  STATUS_READ_ACKNOWLEDGED
62};
63
64/* This structure is used for both pipes and sockets; for
65   a socket, the process handle in pi is NULL. */
66typedef struct _child_process
67{
68  int                   fd;
69  int                   pid;
70  HANDLE                char_avail;
71  HANDLE                char_consumed;
72  HANDLE                thrd;
73  HWND                  hwnd;
74  PROCESS_INFORMATION   procinfo;
75  volatile int          status;
76  char                  chr;
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 */
84typedef struct
85{
86  unsigned         flags;
87  HANDLE           hnd;
88  child_process *  cp;
89} filedesc;
90
91extern 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
105extern child_process * new_child (void);
106extern void delete_child (child_process *cp);
107
108/* ------------------------------------------------------------------------- */
109
110/* Equivalent of strerror for W32 error codes.  */
111extern char * w32_strerror (int error_no);
112
113/* Validate a pointer.  */
114extern int w32_valid_pointer_p (void *, int);
115
116/* Get long (aka "true") form of file name, if it exists.  */
117extern BOOL w32_get_long_filename (char * name, char * buf, int size);
118
119/* Prepare our standard handles for proper inheritance by child processes.  */
120extern void prepare_standard_handles (int in, int out,
121				      int err, HANDLE handles[4]);
122
123/* Reset our standard handles to their original state.  */
124extern 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.  */
128extern LPBYTE w32_get_resource (char * key, LPDWORD type);
129
130extern void init_ntproc (void);
131extern void term_ntproc (void);
132extern void globals_of_w32 (void);
133extern void syms_of_w32term (void);
134extern void syms_of_w32fns (void);
135extern void globals_of_w32fns (void);
136extern void syms_of_w32select (void);
137extern void globals_of_w32select (void);
138extern void term_w32select (void);
139extern void syms_of_w32menu (void);
140extern void globals_of_w32menu (void);
141extern void syms_of_fontset (void);
142
143extern int _sys_read_ahead (int fd);
144extern int _sys_wait_accept (int fd);
145
146#endif /* EMACS_W32_H */
147
148/* arch-tag: 02c36b00-312b-4c4d-a1d9-f905c5e968f0
149   (do not change this comment) */
150