Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 2 | Copyright (c) 2000, BeOpen.com. |
| 3 | Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
| 4 | Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
| 5 | All rights reserved. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 6 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 7 | See the file "Misc/COPYRIGHT" for information on usage and |
| 8 | redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 9 | ******************************************************************/ |
| 10 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 11 | /* Check for interrupts */ |
| 12 | |
Fred Drake | eb375e4 | 2000-08-23 18:17:42 +0000 | [diff] [blame] | 13 | #include "Python.h" |
Guido van Rossum | d6a15ad | 1991-06-24 22:30:42 +0000 | [diff] [blame] | 14 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 15 | #ifdef QUICKWIN |
| 16 | |
| 17 | #include <io.h> |
| 18 | |
| 19 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 20 | PyOS_InitInterrupts(void) |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 21 | { |
| 22 | } |
| 23 | |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 24 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 25 | PyOS_FiniInterrupts(void) |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 26 | { |
| 27 | } |
| 28 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 29 | int |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 30 | PyOS_InterruptOccurred(void) |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 31 | { |
| 32 | _wyield(); |
| 33 | } |
| 34 | |
| 35 | #define OK |
| 36 | |
| 37 | #endif /* QUICKWIN */ |
| 38 | |
Guido van Rossum | 7bf22de | 1997-12-02 20:34:19 +0000 | [diff] [blame] | 39 | #if defined(_M_IX86) && !defined(__QNX__) |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 40 | #include <io.h> |
| 41 | #endif |
| 42 | |
| 43 | #if defined(MSDOS) && !defined(QUICKWIN) |
| 44 | |
| 45 | #ifdef __GNUC__ |
| 46 | |
| 47 | /* This is for DJGPP's GO32 extender. I don't know how to trap |
| 48 | * control-C (There's no API for ctrl-C, and I don't want to mess with |
| 49 | * the interrupt vectors.) However, this DOES catch control-break. |
| 50 | * --Amrit |
| 51 | */ |
| 52 | |
| 53 | #include <go32.h> |
| 54 | |
| 55 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 56 | PyOS_InitInterrupts(void) |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 57 | { |
| 58 | _go32_want_ctrl_break(1 /* TRUE */); |
| 59 | } |
| 60 | |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 61 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 62 | PyOS_FiniInterrupts(void) |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 63 | { |
| 64 | } |
| 65 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 66 | int |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 67 | PyOS_InterruptOccurred(void) |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 68 | { |
| 69 | return _go32_was_ctrl_break_hit(); |
| 70 | } |
| 71 | |
| 72 | #else /* !__GNUC__ */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 73 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 74 | /* This might work for MS-DOS (untested though): */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 75 | |
| 76 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 77 | PyOS_InitInterrupts(void) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 78 | { |
| 79 | } |
| 80 | |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 81 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 82 | PyOS_FiniInterrupts(void) |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 83 | { |
| 84 | } |
| 85 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 86 | int |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 87 | PyOS_InterruptOccurred(void) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 88 | { |
| 89 | int interrupted = 0; |
| 90 | while (kbhit()) { |
| 91 | if (getch() == '\003') |
| 92 | interrupted = 1; |
| 93 | } |
| 94 | return interrupted; |
| 95 | } |
| 96 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 97 | #endif /* __GNUC__ */ |
| 98 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 99 | #define OK |
| 100 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 101 | #endif /* MSDOS && !QUICKWIN */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 102 | |
| 103 | |
Guido van Rossum | d6a15ad | 1991-06-24 22:30:42 +0000 | [diff] [blame] | 104 | #ifdef macintosh |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 105 | |
Jack Jansen | 9fc3989 | 1995-01-27 14:40:41 +0000 | [diff] [blame] | 106 | /* The Mac interrupt code has moved to macglue.c */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 107 | #define OK |
| 108 | |
Guido van Rossum | d6a15ad | 1991-06-24 22:30:42 +0000 | [diff] [blame] | 109 | #endif /* macintosh */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 110 | |
| 111 | |
| 112 | #ifndef OK |
| 113 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 114 | /* Default version -- for real operating systems and for Standard C */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 115 | |
| 116 | #include <stdio.h> |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 117 | #include <string.h> |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 118 | #include <signal.h> |
Guido van Rossum | fd8a393 | 1996-12-02 18:27:33 +0000 | [diff] [blame] | 119 | #ifdef HAVE_UNISTD_H |
| 120 | #include <unistd.h> |
| 121 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 122 | |
Guido van Rossum | 62e376b | 1995-01-17 16:11:53 +0000 | [diff] [blame] | 123 | static int interrupted; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 124 | |
Guido van Rossum | 575d561 | 1995-03-10 15:13:03 +0000 | [diff] [blame] | 125 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 126 | PyErr_SetInterrupt(void) |
Guido van Rossum | 575d561 | 1995-03-10 15:13:03 +0000 | [diff] [blame] | 127 | { |
| 128 | interrupted = 1; |
| 129 | } |
| 130 | |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 131 | extern int PyErr_CheckSignals(void); |
Guido van Rossum | ad74fa6 | 1997-01-21 06:00:33 +0000 | [diff] [blame] | 132 | |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 133 | static int |
| 134 | checksignals_witharg(void * arg) |
| 135 | { |
| 136 | return PyErr_CheckSignals(); |
| 137 | } |
| 138 | |
Tim Peters | 4f1b208 | 2000-07-23 21:18:09 +0000 | [diff] [blame] | 139 | static void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 140 | intcatcher(int sig) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 141 | { |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 142 | extern void Py_Exit(int); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 143 | static char message[] = |
| 144 | "python: to interrupt a truly hanging Python program, interrupt once more.\n"; |
| 145 | switch (interrupted++) { |
| 146 | case 0: |
| 147 | break; |
| 148 | case 1: |
| 149 | write(2, message, strlen(message)); |
| 150 | break; |
| 151 | case 2: |
| 152 | interrupted = 0; |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 153 | Py_Exit(1); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 154 | break; |
| 155 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 156 | signal(SIGINT, intcatcher); |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 157 | Py_AddPendingCall(checksignals_witharg, NULL); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 158 | } |
| 159 | |
Tim Peters | 4f1b208 | 2000-07-23 21:18:09 +0000 | [diff] [blame] | 160 | static void (*old_siginthandler)(int) = SIG_DFL; |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 161 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 162 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 163 | PyOS_InitInterrupts(void) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 164 | { |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 165 | if ((old_siginthandler = signal(SIGINT, SIG_IGN)) != SIG_IGN) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 166 | signal(SIGINT, intcatcher); |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 167 | #ifdef HAVE_SIGINTERRUPT |
Guido van Rossum | acbe8da | 1993-04-15 15:33:52 +0000 | [diff] [blame] | 168 | /* This is for SunOS and other modern BSD derivatives. |
| 169 | It means that system calls (like read()) are not restarted |
| 170 | after an interrupt. This is necessary so interrupting a |
| 171 | read() or readline() call works as expected. |
| 172 | XXX On old BSD (pure 4.2 or older) you may have to do this |
| 173 | differently! */ |
| 174 | siginterrupt(SIGINT, 1); |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 175 | #endif /* HAVE_SIGINTERRUPT */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 176 | } |
| 177 | |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 178 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 179 | PyOS_FiniInterrupts(void) |
Guido van Rossum | aee094c | 1997-08-02 03:02:27 +0000 | [diff] [blame] | 180 | { |
| 181 | signal(SIGINT, old_siginthandler); |
| 182 | } |
| 183 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 184 | int |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 185 | PyOS_InterruptOccurred(void) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 186 | { |
| 187 | if (!interrupted) |
| 188 | return 0; |
| 189 | interrupted = 0; |
| 190 | return 1; |
| 191 | } |
| 192 | |
| 193 | #endif /* !OK */ |
Guido van Rossum | 359bcaa | 1997-11-14 22:24:28 +0000 | [diff] [blame] | 194 | |
| 195 | void |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 196 | PyOS_AfterFork(void) |
Guido van Rossum | 359bcaa | 1997-11-14 22:24:28 +0000 | [diff] [blame] | 197 | { |
| 198 | } |