| /*********************************************************** |
| Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| The Netherlands. |
| |
| All Rights Reserved |
| |
| Permission to use, copy, modify, and distribute this software and its |
| documentation for any purpose and without fee is hereby granted, |
| provided that the above copyright notice appear in all copies and that |
| both that copyright notice and this permission notice appear in |
| supporting documentation, and that the names of Stichting Mathematisch |
| Centrum or CWI not be used in advertising or publicity pertaining to |
| distribution of the software without specific, written prior permission. |
| |
| STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE |
| FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| |
| ******************************************************************/ |
| |
| /* Check for interrupts */ |
| |
| #include "config.h" |
| #include "myproto.h" |
| #include "intrcheck.h" |
| |
| |
| #ifdef QUICKWIN |
| |
| #include <io.h> |
| |
| void |
| initintr() |
| { |
| } |
| |
| int |
| intrcheck() |
| { |
| _wyield(); |
| } |
| |
| #define OK |
| |
| #endif /* QUICKWIN */ |
| |
| #ifdef _M_IX86 |
| #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 |
| initintr() |
| { |
| _go32_want_ctrl_break(1 /* TRUE */); |
| } |
| |
| int |
| intrcheck() |
| { |
| return _go32_was_ctrl_break_hit(); |
| } |
| |
| #else /* !__GNUC__ */ |
| |
| /* This might work for MS-DOS (untested though): */ |
| |
| void |
| initintr() |
| { |
| } |
| |
| int |
| intrcheck() |
| { |
| 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> |
| |
| static int interrupted; |
| |
| void |
| PyErr_SetInterrupt() |
| { |
| interrupted = 1; |
| } |
| |
| /* ARGSUSED */ |
| static RETSIGTYPE |
| #ifdef _M_IX86 |
| intcatcher(int sig) /* So the C compiler shuts up */ |
| #else /* _M_IX86 */ |
| intcatcher(sig) |
| int sig; /* Not used by required by interface */ |
| #endif /* _M_IX86 */ |
| { |
| extern void goaway PROTO((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; |
| goaway(1); |
| break; |
| } |
| signal(SIGINT, intcatcher); |
| } |
| |
| void |
| initintr() |
| { |
| if (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 */ |
| } |
| |
| int |
| intrcheck() |
| { |
| if (!interrupted) |
| return 0; |
| interrupted = 0; |
| return 1; |
| } |
| |
| #endif /* !OK */ |