PyObject *
PyChannel_Receive_nr(PyChannelObject *self)
{
PyObject *ret;
STACKLESS_PROPOSE_ALL();
ret = impl_channel_receive(self);
STACKLESS_ASSERT();
return ret;
}
static PyObject * run_cframe(PyFrameObject *f, int exc, PyObject *retval)
{
PyThreadState *ts = PyThreadState_GET();
PyCFrameObject *cf = (PyCFrameObject*) f;
PyTaskletObject *task = ts->st.current;
int done = cf->i;
ts->frame = f;
if (retval == NULL || done)
goto exit_run_cframe;
if (cf->ob2 == NULL)
cf->ob2 = PyTuple_New(0);
Py_DECREF(retval);
STACKLESS_PROPOSE_ALL();
retval = PyObject_Call(cf->ob1, cf->ob2, cf->ob3);
STACKLESS_ASSERT();
cf->i = 1; /* mark ourself as done */
if (STACKLESS_UNWINDING(retval)) {
/* try to shortcut */
if (ts->st.current == task && ts->frame != NULL &&
ts->frame->f_back == (PyFrameObject *) cf) {
Py_DECREF(ts->frame->f_back);
ts->frame->f_back = cf->f_back;
Py_DECREF(cf); /* the exec reference */
}
return retval;
}
/* pop frame */
exit_run_cframe:
ts->frame = cf->f_back;
Py_DECREF(cf);
return retval;
}
PyObject *
channel_seq_callback(PyFrameObject *_f, int exc, PyObject *retval)
{
PyThreadState *ts;
PyCFrameObject *f = (PyCFrameObject *) _f;
PyChannelObject *ch;
PyChannel_HeapType *t;
PyObject *item;
int stage = f->n;
/* prolog to re-enter the loop */
if (stage == 1) {
item = retval;
goto back_with_data;
}
if (retval == NULL)
goto exit_frame;
Py_DECREF(retval);
retval = NULL;
if (stage == 2) {
goto back_from_send;
}
/* Run iterator to exhaustion. */
for (; ; f->i++) {
/* get the data */
STACKLESS_PROPOSE_ALL();
item = PyIter_Next(f->ob1);
if (STACKLESS_UNWINDING(item)) {
stage = f->n = 1;
return item;
}
back_with_data:
if (item == NULL) {
if (PyErr_Occurred()) {
if (PyErr_ExceptionMatches(
PyExc_StopIteration))
PyErr_Clear();
else
goto exit_frame;
}
break;
}
/* send the data */
ch = (PyChannelObject *) f->ob2;
t = (PyChannel_HeapType *) Py_TYPE(ch);
STACKLESS_PROPOSE_ALL();
retval = t->send(ch, item);
Py_DECREF(item);
if (retval == NULL)
goto exit_frame;
if (STACKLESS_UNWINDING(retval)) {
stage = f->n = 2;
return retval;
}
Py_DECREF(retval);
back_from_send:
;
}
retval = PyLong_FromLong(f->i);
exit_frame:
/* epilog to return from the frame */
ts = PyThreadState_GET();
ts->frame = f->f_back;
Py_DECREF(f);
return retval;
}
PyObject *
PyStackless_Schedule_nr(PyObject *retval, int remove)
{
STACKLESS_PROPOSE_ALL();
return PyStackless_Schedule(retval, remove);
}
int
PyChannel_Send_nr(PyChannelObject *self, PyObject *arg)
{
STACKLESS_PROPOSE_ALL();
return slp_return_wrapper(impl_channel_send(self, arg));
}
