Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 74f4bd53e03ded8408bcc2de67cf0f5a4ac5b1a1 authored by Barry Warsaw on 23 February 2012, 15:59:38 UTC
Bump some more copyright years (as per PEP 101), since this is the first
Bump some more copyright years (as per PEP 101), since this is the first
Tip revision: 74f4bd5
intrcheck.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:
#ifdef RISCOS
fprintf(stderr, message);
#else
write(2, message, strlen(message));
#endif
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
}