pyqueue improvements.

- cleanup queue if it gets deallocated.
- make sure waitables on a queue get removed if their pyqueue_op dies.

include/kore/python_methods.h

@@ -151,6 +151,7 @@ static PyTypeObject pysocket_op_type = {
 
 struct pyqueue_waiting {
 	struct python_coro		*coro;
+	struct pyqueue_op		*op;
 	TAILQ_ENTRY(pyqueue_waiting)	list;
 };
 
@@ -189,6 +190,7 @@ static PyTypeObject pyqueue_type = {
 struct pyqueue_op {
 	PyObject_HEAD
 	struct pyqueue		*queue;
+	struct pyqueue_waiting	*waiting;
 };
 
 static void	pyqueue_op_dealloc(struct pyqueue_op *);

src/python.c

@@ -1198,7 +1198,6 @@ pysocket_op_create(struct pysocket *sock, int type, const void *ptr, size_t len)
 	op->data.evt.handle = pysocket_evt_handle;
 
 	Py_INCREF(op->data.socket);
-	Py_INCREF(op->data.coro->obj);
 
 	switch (type) {
 	case PYSOCKET_TYPE_RECV:
@@ -1408,6 +1407,22 @@ pysocket_evt_handle(void *arg, int error)
 static void
 pyqueue_dealloc(struct pyqueue *queue)
 {
+	struct pyqueue_object	*object;
+	struct pyqueue_waiting	*waiting;
+
+	while ((object = TAILQ_FIRST(&queue->objects)) != NULL) {
+		TAILQ_REMOVE(&queue->objects, object, list);
+		Py_DECREF(object->obj);
+		kore_pool_put(&queue_object_pool, object);
+	}
+
+	while ((waiting = TAILQ_FIRST(&queue->waiting)) != NULL) {
+		TAILQ_REMOVE(&queue->waiting, waiting, list);
+		if (waiting->op != NULL)
+			waiting->op->waiting = NULL;
+		kore_pool_put(&queue_wait_pool, waiting);
+	}
+
 	PyObject_Del((PyObject *)queue);
 }
 
@@ -1415,20 +1430,18 @@ static PyObject *
 pyqueue_pop(struct pyqueue *queue, PyObject *args)
 {
 	struct pyqueue_op	*op;
-	struct pyqueue_waiting	*waiting;
 
 	if ((op = PyObject_New(struct pyqueue_op, &pyqueue_op_type)) == NULL)
 		return (NULL);
 
 	op->queue = queue;
+	op->waiting = kore_pool_get(&queue_wait_pool);
+	op->waiting->op = op;
 
-	waiting = kore_pool_get(&queue_wait_pool);
-
-	waiting->coro = coro_running;
-	TAILQ_INSERT_TAIL(&queue->waiting, waiting, list);
+	op->waiting->coro = coro_running;
+	TAILQ_INSERT_TAIL(&queue->waiting, op->waiting, list);
 
 	Py_INCREF((PyObject *)queue);
-	Py_INCREF(waiting->coro->obj);
 
 	return ((PyObject *)op);
 }
@@ -1460,7 +1473,7 @@ pyqueue_push(struct pyqueue *queue, PyObject *args)
 		else
 			python_coro_wakeup(waiting->coro);
 
-		Py_DECREF(waiting->coro->obj);
+		waiting->op->waiting = NULL;
 		kore_pool_put(&queue_wait_pool, waiting);
 	}
 
@@ -1470,6 +1483,12 @@ pyqueue_push(struct pyqueue *queue, PyObject *args)
 static void
 pyqueue_op_dealloc(struct pyqueue_op *op)
 {
+	if (op->waiting != NULL) {
+		TAILQ_REMOVE(&op->queue->waiting, op->waiting, list);
+		kore_pool_put(&queue_wait_pool, op->waiting);
+		op->waiting = NULL;
+	}
+
 	Py_DECREF((PyObject *)op->queue);
 	PyObject_Del((PyObject *)op);
 }
@@ -1500,7 +1519,6 @@ pyqueue_op_iternext(struct pyqueue_op *op)
 	TAILQ_FOREACH(waiting, &op->queue->waiting, list) {
 		if (waiting->coro == coro_running) {
 			TAILQ_REMOVE(&op->queue->waiting, waiting, list);
-			Py_DECREF(waiting->coro->obj);
 			kore_pool_put(&queue_wait_pool, waiting);
 			break;
 		}