struct bt_callback {
int prio; /* Callback order priority. Lower first. Dynamically assigned from dependency graph. */
void *private_data;
+ int flags;
+ struct bt_dependencies *depends;
+ struct bt_dependencies *weak_depends;
+ struct bt_dependencies *provides;
enum bt_cb_ret (*callback)(void *private_data, void *caller_data);
};
struct ptr_heap *stream_heap;
struct trace_collection *tc;
struct trace_collection_pos *end_pos;
- GArray *callbacks; /* Array of struct bt_stream_hooks */
+ GArray *callbacks; /* Array of struct bt_stream_callbacks */
struct bt_callback_chain main_callbacks; /* For all events */
/*
* Flag indicating if dependency graph needs to be recalculated.
return deps;
}
+/*
+ * babeltrace_iter_add_callback: Add a callback to iterator.
+ */
+int babeltrace_iter_add_callback(struct babeltrace_iter *iter,
+ bt_event_name event, void *private_data, int flags,
+ enum bt_cb_ret (*callback)(void *private_data, void *caller_data),
+ struct bt_dependencies *depends,
+ struct bt_dependencies *weak_depends,
+ struct bt_dependencies *provides)
+{
+ int i, stream_id;
+ gpointer *event_id_ptr;
+ unsigned long event_id;
+ struct trace_collection *tc = iter->tc;
+
+ for (i = 0; i < tc->array->len; i++) {
+ struct ctf_trace *tin;
+ struct trace_descriptor *td_read;
+
+ td_read = g_ptr_array_index(tc->array, i);
+ tin = container_of(td_read, struct ctf_trace, parent);
+
+ for (stream_id = 0; stream_id < tin->streams->len; stream_id++) {
+ struct ctf_stream_class *stream;
+ struct bt_stream_callbacks *bt_stream_cb = NULL;
+ struct bt_callback_chain *bt_chain = NULL;
+ struct bt_callback new_callback;
+
+ stream = g_ptr_array_index(tin->streams, stream_id);
+
+ /* find or create the bt_stream_callbacks for this stream */
+ if (iter->callbacks->len >= stream_id) {
+ bt_stream_cb = &g_array_index(iter->callbacks,
+ struct bt_stream_callbacks, stream->stream_id);
+ } else {
+ g_array_set_size(iter->callbacks, stream->stream_id);
+ }
+ if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks) {
+ struct bt_stream_callbacks new_stream_cb;
+ new_stream_cb.per_id_callbacks = g_array_new(1, 1,
+ sizeof(struct bt_callback_chain));
+ g_array_insert_val(iter->callbacks, stream->stream_id, new_stream_cb);
+ bt_stream_cb = &g_array_index(iter->callbacks,
+ struct bt_stream_callbacks, stream->stream_id);
+ }
+
+ if (event) {
+ /* find the event id */
+ event_id_ptr = g_hash_table_lookup(stream->event_quark_to_id,
+ (gconstpointer) (unsigned long) event);
+ /* event not found in this stream class */
+ if (!event_id_ptr) {
+ printf("event not found\n");
+ continue;
+ }
+ event_id = (uint64_t)*event_id_ptr;
+
+ /* find or create the bt_callback_chain for this event */
+ if (bt_stream_cb->per_id_callbacks->len >= event_id) {
+ bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
+ struct bt_callback_chain, event_id);
+ } else {
+ g_array_set_size(bt_stream_cb->per_id_callbacks, event_id);
+ }
+ if (!bt_chain || !bt_chain->callback) {
+ struct bt_callback_chain new_chain;
+ new_chain.callback = g_array_new(1, 1, sizeof(struct bt_callback));
+ g_array_insert_val(bt_stream_cb->per_id_callbacks, event_id,
+ new_chain);
+ bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
+ struct bt_callback_chain, event_id);
+ }
+ } else {
+ /* callback for all events */
+ if (!iter->main_callbacks.callback) {
+ iter->main_callbacks.callback = g_array_new(1, 1,
+ sizeof(struct bt_callback));
+ }
+ bt_chain = &iter->main_callbacks;
+ }
+
+ new_callback.private_data = private_data;
+ new_callback.flags = flags;
+ new_callback.callback = callback;
+ new_callback.depends = depends;
+ new_callback.weak_depends = weak_depends;
+ new_callback.provides = provides;
+
+ /* TODO : take care of priority, for now just FIFO */
+ g_array_append_val(bt_chain->callback, new_callback);
+ }
+ }
+
+ return 0;
+}
+
static int stream_read_event(struct ctf_file_stream *sin)
{
int ret;
iter->stream_heap = g_new(struct ptr_heap, 1);
iter->tc = tc;
iter->end_pos = end_pos;
+ iter->callbacks = g_array_new(0, 1, sizeof(struct bt_stream_callbacks));
+ iter->recalculate_dep_graph = 0;
+ iter->main_callbacks.callback = NULL;
+ iter->dep_gc = g_ptr_array_new();
ret = heap_init(iter->stream_heap, 0, stream_compare);
if (ret < 0)
return ret;
}
+static
+void process_callbacks(struct babeltrace_iter *iter,
+ struct ctf_stream *stream)
+{
+ struct bt_stream_callbacks *bt_stream_cb;
+ struct bt_callback_chain *bt_chain;
+ struct bt_callback *cb;
+ int i;
+ enum bt_cb_ret ret;
+
+ /* process all events callback first */
+ if (iter->main_callbacks.callback) {
+ for (i = 0; i < iter->main_callbacks.callback->len; i++) {
+ cb = &g_array_index(iter->main_callbacks.callback, struct bt_callback, i);
+ if (!cb)
+ goto end;
+ ret = cb->callback(NULL, NULL);
+ switch (ret) {
+ case BT_CB_OK_STOP:
+ case BT_CB_ERROR_STOP:
+ goto end;
+ default:
+ break;
+ }
+ }
+ }
+
+ /* process per event callbacks */
+ bt_stream_cb = &g_array_index(iter->callbacks,
+ struct bt_stream_callbacks, stream->stream_id);
+ if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks)
+ goto end;
+
+ if (stream->event_id > bt_stream_cb->per_id_callbacks->len)
+ goto end;
+ bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
+ struct bt_callback_chain, stream->event_id);
+ if (!bt_chain || !bt_chain->callback)
+ goto end;
+
+ for (i = 0; i < bt_chain->callback->len; i++) {
+ cb = &g_array_index(bt_chain->callback, struct bt_callback, i);
+ if (!cb)
+ goto end;
+ ret = cb->callback(NULL, NULL);
+ switch (ret) {
+ case BT_CB_OK_STOP:
+ case BT_CB_ERROR_STOP:
+ goto end;
+ default:
+ break;
+ }
+ }
+
+end:
+ return;
+}
+
int babeltrace_iter_read_event(struct babeltrace_iter *iter,
struct ctf_stream **stream,
struct ctf_stream_event **event)
}
*stream = &file_stream->parent;
*event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id);
+
+ if ((*stream)->stream_id > iter->callbacks->len)
+ goto end;
+
+ process_callbacks(iter, *stream);
+
end:
return ret;
}
projects / babeltrace.git / blobdiff