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comparison src/nt.h @ 100:4be1180a9e89 r20-1b2

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Import from CVS: tag r20-1b2
author cvs
date Mon, 13 Aug 2007 09:15:11 +0200
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children 41ff10fd062f
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99:2d83cbd90d8d 100:4be1180a9e89
1 #ifndef _NT_H_
2 #define _NT_H_
3
4 /* Support routines for the NT version of XEmacs.
5 Copyright (C) 1994 Free Software Foundation, Inc.
6
7 This file is part of XEmacs.
8
9 XEmacs is free software; you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 2, or (at your option) any
12 later version.
13
14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with XEmacs; 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 /* Adapted for XEmacs by David Hobley <david@spook-le0.cia.com.au> */
25
26 /* #define FULL_DEBUG */
27 #define EMACSDEBUG
28
29 #ifdef EMACSDEBUG
30 #define DebPrint(stuff) _DebPrint stuff
31 #else
32 #define DebPrint(stuff)
33 #endif
34
35 #define R_OK 4
36 #define W_OK 2
37 #define X_OK 1
38 #define F_OK 0
39
40 /* File descriptor set emulation. */
41
42 /* MSVC runtime library has limit of 64 descriptors by default */
43 #define FD_SETSIZE 64
44 typedef struct {
45 unsigned int bits[FD_SETSIZE / 32];
46 } fd_set;
47
48 /* standard access macros */
49 #define FD_SET(n, p) \
50 do { \
51 if ((n) < FD_SETSIZE) { \
52 (p)->bits[(n)/32] |= (1 << (n)%32); \
53 } \
54 } while (0)
55 #define FD_CLR(n, p) \
56 do { \
57 if ((n) < FD_SETSIZE) { \
58 (p)->bits[(n)/32] &= ~(1 << (n)%32); \
59 } \
60 } while (0)
61 #define FD_ISSET(n, p) ((n) < FD_SETSIZE ? ((p)->bits[(n)/32] & (1 << (n)%32)) : 0)
62 #define FD_ZERO(p) memset((p), 0, sizeof(fd_set))
63
64 #define SELECT_TYPE fd_set
65
66 /* ------------------------------------------------------------------------- */
67
68 /* child_process.status values */
69 enum {
70 STATUS_READ_ERROR = -1,
71 STATUS_READ_READY,
72 STATUS_READ_IN_PROGRESS,
73 STATUS_READ_FAILED,
74 STATUS_READ_SUCCEEDED,
75 STATUS_READ_ACKNOWLEDGED
76 };
77
78 /* This structure is used for both pipes and sockets; for
79 a socket, the process handle in pi is NULL. */
80 typedef struct _child_process
81 {
82 int fd;
83 int pid;
84 int is_dos_process;
85 HANDLE char_avail;
86 HANDLE char_consumed;
87 HANDLE thrd;
88 PROCESS_INFORMATION procinfo;
89 volatile int status;
90 char chr;
91 } child_process;
92
93 #define MAXDESC FD_SETSIZE
94 #define MAX_CHILDREN MAXDESC/2
95 #define CHILD_ACTIVE(cp) ((cp)->char_avail != NULL)
96
97 /* parallel array of private info on file handles */
98 typedef struct
99 {
100 unsigned flags;
101 HANDLE hnd;
102 child_process * cp;
103 } filedesc;
104
105 extern filedesc fd_info [ MAXDESC ];
106
107 /* fd_info flag definitions */
108 #define FILE_READ 0x0001
109 #define FILE_WRITE 0x0002
110 #define FILE_BINARY 0x0010
111 #define FILE_PIPE 0x0100
112 #define FILE_SOCKET 0x0200
113
114 extern child_process * new_child (void);
115 extern void delete_child (child_process *cp);
116
117 /* ------------------------------------------------------------------------- */
118
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 nt_get_resource (char * key, LPDWORD type);
130
131 extern void init_ntproc ();
132 extern void term_ntproc ();
133
134 #endif /* _NT_H_ */