mirror of https://github.com/python/cpython
199 lines
4.1 KiB
C
199 lines
4.1 KiB
C
/***********************************************************
|
|
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 or Corporation for National Research Initiatives or
|
|
CNRI not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
While CWI is the initial source for this software, a modified version
|
|
is made available by the Corporation for National Research Initiatives
|
|
(CNRI) at the Internet address ftp://ftp.python.org.
|
|
|
|
STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
|
|
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
|
|
CENTRUM OR CNRI 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 "mymalloc.h" /* For ANY */
|
|
#include "intrcheck.h"
|
|
|
|
/* Copied here from ceval.h -- can't include that file. */
|
|
int Py_AddPendingCall Py_PROTO((int (*func) Py_PROTO((ANY *)), ANY *arg));
|
|
|
|
|
|
#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>
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
static int interrupted;
|
|
|
|
void
|
|
PyErr_SetInterrupt()
|
|
{
|
|
interrupted = 1;
|
|
}
|
|
|
|
extern int sigcheck();
|
|
|
|
/* 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);
|
|
Py_AddPendingCall(sigcheck, NULL);
|
|
}
|
|
|
|
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 */
|