mirror of https://github.com/python/cpython.git
175 lines
2.5 KiB
C
175 lines
2.5 KiB
C
|
|
/* Check for interrupts */
|
|
|
|
#include "Python.h"
|
|
#include "pythread.h"
|
|
|
|
#ifdef QUICKWIN
|
|
|
|
#include <io.h>
|
|
|
|
void
|
|
PyOS_InitInterrupts(void)
|
|
{
|
|
}
|
|
|
|
void
|
|
PyOS_FiniInterrupts(void)
|
|
{
|
|
}
|
|
|
|
int
|
|
PyOS_InterruptOccurred(void)
|
|
{
|
|
_wyield();
|
|
}
|
|
|
|
#define OK
|
|
|
|
#endif /* QUICKWIN */
|
|
|
|
#if defined(_M_IX86) && !defined(__QNX__)
|
|
#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
|
|
PyOS_InitInterrupts(void)
|
|
{
|
|
_go32_want_ctrl_break(1 /* TRUE */);
|
|
}
|
|
|
|
void
|
|
PyOS_FiniInterrupts(void)
|
|
{
|
|
}
|
|
|
|
int
|
|
PyOS_InterruptOccurred(void)
|
|
{
|
|
return _go32_was_ctrl_break_hit();
|
|
}
|
|
|
|
#else /* !__GNUC__ */
|
|
|
|
/* This might work for MS-DOS (untested though): */
|
|
|
|
void
|
|
PyOS_InitInterrupts(void)
|
|
{
|
|
}
|
|
|
|
void
|
|
PyOS_FiniInterrupts(void)
|
|
{
|
|
}
|
|
|
|
int
|
|
PyOS_InterruptOccurred(void)
|
|
{
|
|
int interrupted = 0;
|
|
while (kbhit()) {
|
|
if (getch() == '\003')
|
|
interrupted = 1;
|
|
}
|
|
return interrupted;
|
|
}
|
|
|
|
#endif /* __GNUC__ */
|
|
|
|
#define OK
|
|
|
|
#endif /* MSDOS && !QUICKWIN */
|
|
|
|
|
|
#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(void)
|
|
{
|
|
interrupted = 1;
|
|
}
|
|
|
|
extern int PyErr_CheckSignals(void);
|
|
|
|
static int
|
|
checksignals_witharg(void * arg)
|
|
{
|
|
return PyErr_CheckSignals();
|
|
}
|
|
|
|
static void
|
|
intcatcher(int sig)
|
|
{
|
|
extern void Py_Exit(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;
|
|
Py_Exit(1);
|
|
break;
|
|
}
|
|
PyOS_setsig(SIGINT, intcatcher);
|
|
Py_AddPendingCall(checksignals_witharg, NULL);
|
|
}
|
|
|
|
static void (*old_siginthandler)(int) = SIG_DFL;
|
|
|
|
void
|
|
PyOS_InitInterrupts(void)
|
|
{
|
|
if ((old_siginthandler = PyOS_setsig(SIGINT, SIG_IGN)) != SIG_IGN)
|
|
PyOS_setsig(SIGINT, intcatcher);
|
|
}
|
|
|
|
void
|
|
PyOS_FiniInterrupts(void)
|
|
{
|
|
PyOS_setsig(SIGINT, old_siginthandler);
|
|
}
|
|
|
|
int
|
|
PyOS_InterruptOccurred(void)
|
|
{
|
|
if (!interrupted)
|
|
return 0;
|
|
interrupted = 0;
|
|
return 1;
|
|
}
|
|
|
|
#endif /* !OK */
|
|
|
|
void
|
|
PyOS_AfterFork(void)
|
|
{
|
|
#ifdef WITH_THREAD
|
|
PyEval_ReInitThreads();
|
|
PyThread_ReInitTLS();
|
|
#endif
|
|
}
|