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Take out my (long since disabled) POSIX signal mask handling code.

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I'm not going to have the time or energy to get this working x-platform
-- anyone who does is welcome to the code!
This commit is contained in:
Michael W. Hudson 2003-03-13 13:56:53 +00:00
parent 94afd3095e
commit 43ed43bfc1
5 changed files with 6 additions and 289 deletions
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171
Modules/signalmodule.c
View file

@ -269,153 +269,6 @@ SIG_DFL -- if the default action for the signal is in effect\n\
None -- if an unknown handler is in effect\n\
anything else -- the callable Python object used as a handler");
#ifdef HAVE_SIGPROCMASK /* we assume that having SIGPROCMASK is enough
to guarantee full POSIX signal handling */
/* returns 0 for success, <0 for failure (with exception set) */
static int
_signal_list_to_sigset(PyObject* seq, sigset_t* set, char* mesg)
{
int i, len, val;
seq = PySequence_Fast(seq, mesg);
if (!seq)
return -1;
len = PySequence_Fast_GET_SIZE(seq);
sigemptyset(set);
for (i = 0; i < len; i++) {
val = PyInt_AsLong(PySequence_Fast_GET_ITEM(seq, i));
if (val == -1 && PyErr_Occurred()) {
Py_DECREF(seq);
return -1;
}
if (sigaddset(set, val) < 0) {
Py_DECREF(seq);
PyErr_SetFromErrno(PyExc_ValueError);
return -1;
}
}
Py_DECREF(seq);
return 0;
}
static PyObject*
_signal_sigset_to_list(sigset_t* set)
{
PyObject* ret;
PyObject* ob;
int i;
ret = PyList_New(0);
if (!ret)
return NULL;
for (i = 1; i < NSIG; i++) {
if (sigismember(set, i)) {
ob = PyInt_FromLong(i);
if (!ob) {
Py_DECREF(ret);
return NULL;
}
PyList_Append(ret, ob);
Py_DECREF(ob);
}
}
return ret;
}
static PyObject*
signal_sigprocmask(PyObject* self, PyObject* args)
{
int how;
sigset_t newset, oldset;
PyObject* seq;
if (!PyArg_ParseTuple(args, "iO", &how, &seq))
return NULL;
if (_signal_list_to_sigset(seq, &newset,
"sigprocmask requires a sequence") < 0)
return NULL;
if (sigprocmask(how, &newset, &oldset) < 0) {
return PyErr_SetFromErrno(PyExc_ValueError);
}
if (PyErr_CheckSignals())
return NULL;
return _signal_sigset_to_list(&oldset);
}
PyDoc_STRVAR(sigprocmask_doc,
"sigprocmask(how, sigset) -> sigset\n\
\n\
Change the list of currently blocked signals. The parameter how should be\n\
one of SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK and sigset should be a\n\
sequence of signal numbers. The behaviour of the call depends on the value\n\
of how:\n\
\n\
SIG_BLOCK\n\
The set of blocked signals is the union of the current set and the\n\
sigset argument.\n\
SIG_UNBLOCK\n\
The signals in sigset are removed from the current set of blocked\n\
signals. It is legal to attempt to unblock a signal which is not\n\
blocked.\n\
SIG_SETMASK\n\
The set of blocked signals is set to the argument set.\n\
\n\
A list contating the numbers of the previously blocked signals is returned.");
static PyObject*
signal_sigpending(PyObject* self)
{
sigset_t set;
if (sigpending(&set) < 0) {
return PyErr_SetFromErrno(PyExc_ValueError);
}
return _signal_sigset_to_list(&set);
}
PyDoc_STRVAR(sigpending_doc,
"sigpending() -> sigset\n\
\n\
Return the set of pending signals, i.e. a list containing the numbers of\n\
those signals that have been raised while blocked.");
static PyObject*
signal_sigsuspend(PyObject* self, PyObject* arg)
{
sigset_t set;
if (_signal_list_to_sigset(arg, &set,
"sigsuspend requires a sequence") < 0)
return NULL;
Py_BEGIN_ALLOW_THREADS
sigsuspend(&set);
Py_END_ALLOW_THREADS
if (PyErr_CheckSignals())
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(sigsuspend_doc,
"sigsuspend(sigset) -> None\n\
\n\
Temporarily replace the signal mask with sigset (which should be a sequence\n\
of signal numbers) and suspend the process until a signal is received.");
#endif
/* List of functions defined in the module */
static PyMethodDef signal_methods[] = {
@ -430,14 +283,6 @@ static PyMethodDef signal_methods[] = {
#endif
{"default_int_handler", signal_default_int_handler,
METH_VARARGS, default_int_handler_doc},
#ifdef HAVE_SIGPROCMASK
{"sigprocmask", (PyCFunction)signal_sigprocmask,
METH_VARARGS, sigprocmask_doc},
{"sigpending", (PyCFunction)signal_sigpending,
METH_NOARGS, sigpending_doc},
{"sigsuspend", (PyCFunction)signal_sigsuspend,
METH_O, sigsuspend_doc},
#endif
{NULL, NULL} /* sentinel */
};
@ -453,10 +298,6 @@ getsignal() -- get the signal action for a given signal\n\
pause() -- wait until a signal arrives [Unix only]\n\
default_int_handler() -- default SIGINT handler\n\
\n\
sigpending() |\n\
sigprocmask() |-- posix signal mask handling [Unix only]\n\
sigsuspend() |\n\
\n\
Constants:\n\
\n\
SIG_DFL -- used to refer to the system default handler\n\
@ -705,18 +546,6 @@ initsignal(void)
PyDict_SetItemString(d, "SIGINFO", x);
Py_XDECREF(x);
#endif
#ifdef HAVE_SIGPROCMASK
x = PyInt_FromLong(SIG_BLOCK);
PyDict_SetItemString(d, "SIG_BLOCK", x);
Py_XDECREF(x);
x = PyInt_FromLong(SIG_UNBLOCK);
PyDict_SetItemString(d, "SIG_UNBLOCK", x);
Py_XDECREF(x);
x = PyInt_FromLong(SIG_SETMASK);
PyDict_SetItemString(d, "SIG_SETMASK", x);
Py_XDECREF(x);
#endif
if (!PyErr_Occurred())
return;