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1 #ifndef _NT_H_
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2 #define _NT_H_
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3
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4 /* Support routines for the NT version of XEmacs.
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5 Copyright (C) 1994 Free Software Foundation, Inc.
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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24 /* Adapted for XEmacs by David Hobley <david@spook-le0.cia.com.au> */
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25
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26 /* #define FULL_DEBUG */
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27 #define EMACSDEBUG
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28
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29 #ifdef EMACSDEBUG
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30 #define DebPrint(stuff) _DebPrint stuff
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31 #else
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32 #define DebPrint(stuff)
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33 #endif
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34
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35 #define R_OK 4
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36 #define W_OK 2
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37 #define X_OK 1
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38 #define F_OK 0
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39
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40 /* File descriptor set emulation. */
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41
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42 /* MSVC runtime library has limit of 64 descriptors by default */
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43 #define FD_SETSIZE 64
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44 typedef struct {
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45 unsigned int bits[FD_SETSIZE / 32];
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46 } fd_set;
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47
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48 /* standard access macros */
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49 #define FD_SET(n, p) \
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50 do { \
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51 if ((n) < FD_SETSIZE) { \
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52 (p)->bits[(n)/32] |= (1 << (n)%32); \
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53 } \
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54 } while (0)
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55 #define FD_CLR(n, p) \
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56 do { \
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57 if ((n) < FD_SETSIZE) { \
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58 (p)->bits[(n)/32] &= ~(1 << (n)%32); \
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59 } \
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60 } while (0)
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61 #define FD_ISSET(n, p) ((n) < FD_SETSIZE ? ((p)->bits[(n)/32] & (1 << (n)%32)) : 0)
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62 #define FD_ZERO(p) memset((p), 0, sizeof(fd_set))
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63
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64 #define SELECT_TYPE fd_set
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65
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66 /* ------------------------------------------------------------------------- */
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67
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68 /* child_process.status values */
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69 enum {
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70 STATUS_READ_ERROR = -1,
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71 STATUS_READ_READY,
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72 STATUS_READ_IN_PROGRESS,
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73 STATUS_READ_FAILED,
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74 STATUS_READ_SUCCEEDED,
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75 STATUS_READ_ACKNOWLEDGED
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76 };
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77
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78 /* This structure is used for both pipes and sockets; for
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79 a socket, the process handle in pi is NULL. */
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80 typedef struct _child_process
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81 {
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82 int fd;
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83 int pid;
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84 int is_dos_process;
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85 HANDLE char_avail;
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86 HANDLE char_consumed;
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87 HANDLE thrd;
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88 PROCESS_INFORMATION procinfo;
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89 volatile int status;
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90 char chr;
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91 } child_process;
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92
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93 #define MAXDESC FD_SETSIZE
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94 #define MAX_CHILDREN MAXDESC/2
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95 #define CHILD_ACTIVE(cp) ((cp)->char_avail != NULL)
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96
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97 /* parallel array of private info on file handles */
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98 typedef struct
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99 {
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100 unsigned flags;
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101 HANDLE hnd;
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102 child_process * cp;
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103 } filedesc;
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104
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105 extern filedesc fd_info [ MAXDESC ];
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106
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107 /* fd_info flag definitions */
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108 #define FILE_READ 0x0001
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109 #define FILE_WRITE 0x0002
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110 #define FILE_BINARY 0x0010
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111 #define FILE_PIPE 0x0100
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112 #define FILE_SOCKET 0x0200
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113
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114 extern child_process * new_child (void);
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115 extern void delete_child (child_process *cp);
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116
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117 /* ------------------------------------------------------------------------- */
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118
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119
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120 /* Prepare our standard handles for proper inheritance by child processes. */
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121 extern void prepare_standard_handles (int in, int out,
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122 int err, HANDLE handles[4]);
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123
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124 /* Reset our standard handles to their original state. */
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125 extern void reset_standard_handles (int in, int out,
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126 int err, HANDLE handles[4]);
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127
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128 /* Return the string resource associated with KEY of type TYPE. */
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129 extern LPBYTE nt_get_resource (char * key, LPDWORD type);
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130
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131 extern void init_ntproc ();
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132 extern void term_ntproc ();
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133
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134 #endif /* _NT_H_ */
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