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1be46844d9
#if RETSIGTYPE != void That isn't C, and MSVC properly refuses to compile it. Introduced new Py_RETURN_FROM_SIGNAL_HANDLER macro in pyport.h to expand to the correct thing based on RETSIGTYPE. However, only void is ANSI! Do we still have platforms that return int? The Unix config mess appears to #define RETSIGTYPE by magic without being asked to, so I assume it's "a problem" across Unices still.
212 lines
3.6 KiB
C
212 lines
3.6 KiB
C
/***********************************************************
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Copyright (c) 2000, BeOpen.com.
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Copyright (c) 1995-2000, Corporation for National Research Initiatives.
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Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
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All rights reserved.
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See the file "Misc/COPYRIGHT" for information on usage and
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redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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******************************************************************/
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/* Check for interrupts */
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#include "config.h"
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/* config.h may or may not define DL_IMPORT */
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#ifndef DL_IMPORT /* declarations for DLL import/export */
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#define DL_IMPORT(RTYPE) RTYPE
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#endif
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#include "myproto.h"
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#include "mymalloc.h" /* For ANY */
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#include "intrcheck.h"
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/* Copied here from ceval.h -- can't include that file. */
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int Py_AddPendingCall(int (*func)(ANY *), ANY *arg);
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#ifdef QUICKWIN
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#include <io.h>
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void
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PyOS_InitInterrupts(void)
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{
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}
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void
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PyOS_FiniInterrupts(void)
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{
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}
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int
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PyOS_InterruptOccurred(void)
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{
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_wyield();
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}
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#define OK
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#endif /* QUICKWIN */
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#if defined(_M_IX86) && !defined(__QNX__)
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#include <io.h>
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#endif
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#if defined(MSDOS) && !defined(QUICKWIN)
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#ifdef __GNUC__
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/* This is for DJGPP's GO32 extender. I don't know how to trap
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* control-C (There's no API for ctrl-C, and I don't want to mess with
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* the interrupt vectors.) However, this DOES catch control-break.
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* --Amrit
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*/
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#include <go32.h>
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void
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PyOS_InitInterrupts(void)
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{
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_go32_want_ctrl_break(1 /* TRUE */);
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}
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void
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PyOS_FiniInterrupts(void)
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{
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}
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int
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PyOS_InterruptOccurred(void)
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{
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return _go32_was_ctrl_break_hit();
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}
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#else /* !__GNUC__ */
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/* This might work for MS-DOS (untested though): */
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void
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PyOS_InitInterrupts(void)
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{
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}
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void
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PyOS_FiniInterrupts(void)
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{
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}
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int
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PyOS_InterruptOccurred(void)
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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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#endif /* __GNUC__ */
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#define OK
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#endif /* MSDOS && !QUICKWIN */
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#ifdef macintosh
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/* The Mac interrupt code has moved to macglue.c */
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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 <string.h>
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#include <signal.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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static int interrupted;
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void
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PyErr_SetInterrupt(void)
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{
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interrupted = 1;
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}
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extern int PyErr_CheckSignals(void);
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static int
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checksignals_witharg(void * arg)
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{
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return PyErr_CheckSignals();
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}
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static RETSIGTYPE
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intcatcher(int sig)
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{
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extern void Py_Exit(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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Py_Exit(1);
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break;
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}
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signal(SIGINT, intcatcher);
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Py_AddPendingCall(checksignals_witharg, NULL);
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Py_RETURN_FROM_SIGNAL_HANDLER(0);
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}
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static RETSIGTYPE (*old_siginthandler)(int) = SIG_DFL;
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void
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PyOS_InitInterrupts(void)
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{
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if ((old_siginthandler = signal(SIGINT, SIG_IGN)) != SIG_IGN)
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signal(SIGINT, intcatcher);
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#ifdef HAVE_SIGINTERRUPT
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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 /* HAVE_SIGINTERRUPT */
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}
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void
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PyOS_FiniInterrupts(void)
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{
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signal(SIGINT, old_siginthandler);
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}
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int
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PyOS_InterruptOccurred(void)
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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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void
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PyOS_AfterFork(void)
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{
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}
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