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/* Copyright (c) 2011-2012 Denis Bilenko. See LICENSE for details. */
#ifdef Py_PYTHON_H
/* the name changes depending on our file layout and --module-name option */
#define _GEVENTLOOP struct __pyx_vtabstruct_6gevent_5libev_8corecext_loop
static void gevent_handle_error(struct PyGeventLoopObject* loop, PyObject* context) {
PyThreadState *tstate;
PyObject *type, *value, *traceback, *result;
tstate = PyThreadState_GET();
type = tstate->curexc_type;
if (!type)
return;
value = tstate->curexc_value;
traceback = tstate->curexc_traceback;
if (!value) value = Py_None;
if (!traceback) traceback = Py_None;
Py_INCREF(type);
Py_INCREF(value);
Py_INCREF(traceback);
PyErr_Clear();
result = ((_GEVENTLOOP *)loop->__pyx_vtab)->handle_error(loop, context, type, value, traceback, 0);
if (result) {
Py_DECREF(result);
}
else {
PyErr_Print();
PyErr_Clear();
}
Py_DECREF(type);
Py_DECREF(value);
Py_DECREF(traceback);
}
static CYTHON_INLINE void gevent_check_signals(struct PyGeventLoopObject* loop) {
if (!ev_is_default_loop(loop->_ptr)) {
/* only reporting signals on the default loop */
return;
}
PyErr_CheckSignals();
if (PyErr_Occurred()) gevent_handle_error(loop, Py_None);
}
#define GET_OBJECT(PY_TYPE, EV_PTR, MEMBER) \
((struct PY_TYPE *)(((char *)EV_PTR) - offsetof(struct PY_TYPE, MEMBER)))
#ifdef WITH_THREAD
#define GIL_DECLARE PyGILState_STATE ___save
#define GIL_ENSURE ___save = PyGILState_Ensure();
#define GIL_RELEASE PyGILState_Release(___save);
#else
#define GIL_DECLARE
#define GIL_ENSURE
#define GIL_RELEASE
#endif
static void gevent_stop(PyObject* watcher, struct PyGeventLoopObject* loop) {
PyObject *result, *method;
int error;
error = 1;
method = PyObject_GetAttrString(watcher, "stop");
if (method) {
result = PyObject_Call(method, __pyx_empty_tuple, NULL);
if (result) {
Py_DECREF(result);
error = 0;
}
Py_DECREF(method);
}
if (error) {
gevent_handle_error(loop, watcher);
}
}
static void gevent_callback(struct PyGeventLoopObject* loop, PyObject* callback, PyObject* args, PyObject* watcher, void *c_watcher, int revents) {
GIL_DECLARE;
PyObject *result, *py_events;
long length;
py_events = 0;
GIL_ENSURE;
Py_INCREF(loop);
Py_INCREF(callback);
Py_INCREF(args);
Py_INCREF(watcher);
gevent_check_signals(loop);
if (args == Py_None) {
args = __pyx_empty_tuple;
}
length = PyTuple_Size(args);
if (length < 0) {
gevent_handle_error(loop, watcher);
goto end;
}
if (length > 0 && PyTuple_GET_ITEM(args, 0) == GEVENT_CORE_EVENTS) {
py_events = PyInt_FromLong(revents);
if (!py_events) {
gevent_handle_error(loop, watcher);
goto end;
}
PyTuple_SET_ITEM(args, 0, py_events);
}
else {
py_events = NULL;
}
result = PyObject_Call(callback, args, NULL);
if (result) {
Py_DECREF(result);
}
else {
gevent_handle_error(loop, watcher);
if (revents & (EV_READ|EV_WRITE)) {
/* io watcher: not stopping it may cause the failing callback to be called repeatedly */
gevent_stop(watcher, loop);
goto end;
}
}
if (!ev_is_active(c_watcher)) {
/* Watcher was stopped, maybe by libev. Let's call stop() to clean up
* 'callback' and 'args' properties, do Py_DECREF() and ev_ref() if necessary.
* BTW, we don't need to check for EV_ERROR, because libev stops the watcher in that case. */
gevent_stop(watcher, loop);
}
end:
if (py_events) {
Py_DECREF(py_events);
PyTuple_SET_ITEM(args, 0, GEVENT_CORE_EVENTS);
}
Py_DECREF(watcher);
Py_DECREF(args);
Py_DECREF(callback);
Py_DECREF(loop);
GIL_RELEASE;
}
static void gevent_call(struct PyGeventLoopObject* loop, struct PyGeventCallbackObject* cb) {
/* no need for GIL here because it is only called from run_callbacks which already has GIL */
PyObject *result, *callback, *args;
if (!loop || !cb)
return;
callback = cb->callback;
args = cb->args;
if (!callback || !args)
return;
if (callback == Py_None || args == Py_None)
return;
Py_INCREF(loop);
Py_INCREF(callback);
Py_INCREF(args);
Py_INCREF(Py_None);
Py_DECREF(cb->callback);
cb->callback = Py_None;
result = PyObject_Call(callback, args, NULL);
if (result) {
Py_DECREF(result);
}
else {
gevent_handle_error(loop, (PyObject*)cb);
}
Py_INCREF(Py_None);
Py_DECREF(cb->args);
cb->args = Py_None;
Py_DECREF(callback);
Py_DECREF(args);
Py_DECREF(loop);
}
#undef DEFINE_CALLBACK
#define DEFINE_CALLBACK(WATCHER_LC, WATCHER_TYPE) \
static void gevent_callback_##WATCHER_LC(struct ev_loop *_loop, void *c_watcher, int revents) { \
struct PyGevent##WATCHER_TYPE##Object* watcher = GET_OBJECT(PyGevent##WATCHER_TYPE##Object, c_watcher, _watcher); \
gevent_callback(watcher->loop, watcher->_callback, watcher->args, (PyObject*)watcher, c_watcher, revents); \
}
DEFINE_CALLBACKS
static void gevent_run_callbacks(struct ev_loop *_loop, void *watcher, int revents) {
struct PyGeventLoopObject* loop;
PyObject *result;
GIL_DECLARE;
GIL_ENSURE;
loop = GET_OBJECT(PyGeventLoopObject, watcher, _prepare);
Py_INCREF(loop);
gevent_check_signals(loop);
result = ((_GEVENTLOOP *)loop->__pyx_vtab)->_run_callbacks(loop);
if (result) {
Py_DECREF(result);
}
else {
PyErr_Print();
PyErr_Clear();
}
Py_DECREF(loop);
GIL_RELEASE;
}
#if defined(_WIN32)
static void gevent_periodic_signal_check(struct ev_loop *_loop, void *watcher, int revents) {
GIL_DECLARE;
GIL_ENSURE;
gevent_check_signals(GET_OBJECT(PyGeventLoopObject, watcher, _periodic_signal_checker));
GIL_RELEASE;
}
#endif /* _WIN32 */
#endif /* Py_PYTHON_H */
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