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f1dc566328
* many files: made some functions static; removed "extern int errno;". * frozenmain.c: fixed bugs introduced on 24 June... * flmodule.c: remove 1.5 bw compat hacks, add new functions in 2.2a (and some old functions that were omitted). * timemodule.c: added MSDOS floatsleep version . * pgenmain.c: changed exit() to goaway() and added defn of goaway(). * intrcheck.c: add hack (to UNIX only) so interrupting 3 times will exit from a hanging program. The second interrupt prints a message explaining this to the user.
177 lines
3.5 KiB
C
177 lines
3.5 KiB
C
/***********************************************************
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Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
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Amsterdam, The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Check for interrupts */
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#ifdef THINK_C
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/* This is for THINK C 4.0.
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For 3.0, you may have to remove the signal stuff. */
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#include <MacHeaders>
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#define macintosh
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#endif
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#include "PROTO.h"
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#include "intrcheck.h"
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#ifdef MSDOS
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/* This might work for MS-DOS (untested though): */
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void
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initintr()
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{
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}
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int
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intrcheck()
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{
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int interrupted = 0;
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while (kbhit()) {
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if (getch() == '\003')
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interrupted = 1;
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}
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return interrupted;
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}
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#define OK
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#endif
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#ifdef macintosh
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#ifdef applec /* MPW */
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#include <OSEvents.h>
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#include <SysEqu.h>
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#endif
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#include <signal.h>
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#include "sigtype.h"
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static int interrupted;
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static SIGTYPE intcatcher PROTO((int));
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static SIGTYPE
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intcatcher(sig)
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int sig;
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{
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interrupted = 1;
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signal(SIGINT, intcatcher);
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}
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void
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initintr()
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{
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if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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signal(SIGINT, intcatcher);
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}
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int
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intrcheck()
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{
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register EvQElPtr q;
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q = (EvQElPtr) GetEvQHdr()->qHead;
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for (; q; q = (EvQElPtr)q->qLink) {
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if (q->evtQWhat == keyDown &&
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(char)q->evtQMessage == '.' &&
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(q->evtQModifiers & cmdKey) != 0) {
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FlushEvents(keyDownMask, 0);
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interrupted = 1;
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break;
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}
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}
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if (interrupted) {
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interrupted = 0;
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return 1;
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}
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return 0;
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}
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#define OK
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#endif /* macintosh */
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#ifndef OK
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/* Default version -- for real operating systems and for Standard C */
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#include <stdio.h>
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#include <signal.h>
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#include "sigtype.h"
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static int interrupted;
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/* ARGSUSED */
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static SIGTYPE
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intcatcher(sig)
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int sig; /* Not used by required by interface */
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{
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extern void goaway PROTO((int));
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static char message[] =
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"python: to interrupt a truly hanging Python program, interrupt once more.\n";
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switch (interrupted++) {
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case 0:
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break;
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case 1:
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write(2, message, strlen(message));
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break;
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case 2:
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interrupted = 0;
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goaway(1);
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break;
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}
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signal(SIGINT, intcatcher);
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}
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void
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initintr()
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{
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if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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signal(SIGINT, intcatcher);
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#ifdef SV_INTERRUPT
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/* This is for SunOS and other modern BSD derivatives.
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It means that system calls (like read()) are not restarted
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after an interrupt. This is necessary so interrupting a
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read() or readline() call works as expected.
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XXX On old BSD (pure 4.2 or older) you may have to do this
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differently! */
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siginterrupt(SIGINT, 1);
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#endif
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}
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int
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intrcheck()
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{
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if (!interrupted)
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return 0;
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interrupted = 0;
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return 1;
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}
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#endif /* !OK */
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