1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/***********************************************************
Copyright (c) 2000, BeOpen.com.
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
All rights reserved.
See the file "Misc/COPYRIGHT" for information on usage and
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
******************************************************************/
/* Check for interrupts */
#include "config.h"
/* config.h may or may not define DL_IMPORT */
#ifndef DL_IMPORT /* declarations for DLL import/export */
#define DL_IMPORT(RTYPE) RTYPE
#endif
#include "myproto.h"
#include "mymalloc.h" /* For ANY */
#include "intrcheck.h"
/* Copied here from ceval.h -- can't include that file. */
int Py_AddPendingCall(int (*func)(ANY *), ANY *arg);
#ifdef QUICKWIN
#include <io.h>
void
PyOS_InitInterrupts(void)
{
}
void
PyOS_FiniInterrupts(void)
{
}
int
PyOS_InterruptOccurred(void)
{
_wyield();
}
#define OK
#endif /* QUICKWIN */
#if defined(_M_IX86) && !defined(__QNX__)
#include <io.h>
#endif
#if defined(MSDOS) && !defined(QUICKWIN)
#ifdef __GNUC__
/* This is for DJGPP's GO32 extender. I don't know how to trap
* control-C (There's no API for ctrl-C, and I don't want to mess with
* the interrupt vectors.) However, this DOES catch control-break.
* --Amrit
*/
#include <go32.h>
void
PyOS_InitInterrupts(void)
{
_go32_want_ctrl_break(1 /* TRUE */);
}
void
PyOS_FiniInterrupts(void)
{
}
int
PyOS_InterruptOccurred(void)
{
return _go32_was_ctrl_break_hit();
}
#else /* !__GNUC__ */
/* This might work for MS-DOS (untested though): */
void
PyOS_InitInterrupts(void)
{
}
void
PyOS_FiniInterrupts(void)
{
}
int
PyOS_InterruptOccurred(void)
{
int interrupted = 0;
while (kbhit()) {
if (getch() == '\003')
interrupted = 1;
}
return interrupted;
}
#endif /* __GNUC__ */
#define OK
#endif /* MSDOS && !QUICKWIN */
#ifdef macintosh
/* The Mac interrupt code has moved to macglue.c */
#define OK
#endif /* macintosh */
#ifndef OK
/* Default version -- for real operating systems and for Standard C */
#include <stdio.h>
#include <string.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
static int interrupted;
void
PyErr_SetInterrupt(void)
{
interrupted = 1;
}
extern int PyErr_CheckSignals(void);
static int
checksignals_witharg(void * arg)
{
return PyErr_CheckSignals();
}
static void
intcatcher(int sig)
{
extern void Py_Exit(int);
static char message[] =
"python: to interrupt a truly hanging Python program, interrupt once more.\n";
switch (interrupted++) {
case 0:
break;
case 1:
write(2, message, strlen(message));
break;
case 2:
interrupted = 0;
Py_Exit(1);
break;
}
signal(SIGINT, intcatcher);
Py_AddPendingCall(checksignals_witharg, NULL);
}
static void (*old_siginthandler)(int) = SIG_DFL;
void
PyOS_InitInterrupts(void)
{
if ((old_siginthandler = signal(SIGINT, SIG_IGN)) != SIG_IGN)
signal(SIGINT, intcatcher);
#ifdef HAVE_SIGINTERRUPT
/* This is for SunOS and other modern BSD derivatives.
It means that system calls (like read()) are not restarted
after an interrupt. This is necessary so interrupting a
read() or readline() call works as expected.
XXX On old BSD (pure 4.2 or older) you may have to do this
differently! */
siginterrupt(SIGINT, 1);
#endif /* HAVE_SIGINTERRUPT */
}
void
PyOS_FiniInterrupts(void)
{
signal(SIGINT, old_siginthandler);
}
int
PyOS_InterruptOccurred(void)
{
if (!interrupted)
return 0;
interrupted = 0;
return 1;
}
#endif /* !OK */
void
PyOS_AfterFork(void)
{
}
|
