#include <babeltrace/iterator-internal.h>
#include <babeltrace/iterator.h>
#include <babeltrace/prio_heap.h>
+#include <inttypes.h>
struct stream_saved_pos {
/*
struct ctf_file_stream *file_stream;
size_t cur_index; /* current index in packet index */
ssize_t offset; /* offset from base, in bits. EOF for end of file. */
+ uint64_t current_timestamp;
};
struct bt_saved_pos {
return 0;
}
+void bt_iter_free_pos(struct bt_iter_pos *iter_pos)
+{
+ if (iter_pos) {
+ if (iter_pos->u.restore) {
+ if (iter_pos->u.restore->stream_saved_pos) {
+ g_array_free(
+ iter_pos->u.restore->stream_saved_pos,
+ TRUE);
+ }
+ g_free(iter_pos->u.restore);
+ }
+ g_free(iter_pos);
+ }
+}
+
+int bt_iter_set_pos(struct bt_iter *iter, const struct bt_iter_pos *iter_pos)
+{
+ int i, ret;
+
+ if (iter_pos->u.restore) {
+ /* clear and recreate the heap */
+ heap_free(iter->stream_heap);
+ g_free(iter->stream_heap);
+ iter->stream_heap = g_new(struct ptr_heap, 1);
+ ret = heap_init(iter->stream_heap, 0, stream_compare);
+ if (ret < 0)
+ goto error_heap_init;
+
+ for (i = 0; i < iter_pos->u.restore->stream_saved_pos->len;
+ i++) {
+ struct stream_saved_pos *saved_pos;
+ struct ctf_stream_pos *stream_pos;
+ struct packet_index *index;
+ struct ctf_stream *stream;
+
+ saved_pos = &g_array_index(
+ iter_pos->u.restore->stream_saved_pos,
+ struct stream_saved_pos, i);
+ stream = &saved_pos->file_stream->parent;
+ stream_pos = &saved_pos->file_stream->pos;
+ index = &g_array_index(stream_pos->packet_index,
+ struct packet_index,
+ saved_pos->cur_index);
+
+ stream_pos->cur_index = saved_pos->cur_index;
+ stream_pos->move_pos_slow(stream_pos, index->offset,
+ SEEK_SET);
+
+ /*
+ * the timestamp needs to be restored after
+ * move_pos_slow, because this function resets
+ * the timestamp to the beginning of the packet
+ */
+ stream->timestamp = saved_pos->current_timestamp;
+ stream_pos->offset = saved_pos->offset;
+ stream_pos->last_offset = saved_pos->offset;
+
+ stream->prev_timestamp = 0;
+ stream->prev_timestamp_end = 0;
+ stream->consumed = 0;
+
+ printf_debug("restored to cur_index = %zd and "
+ "offset = %zd, timestamp = %" PRIu64 "\n",
+ stream_pos->cur_index,
+ stream_pos->offset, stream->timestamp);
+
+ stream_read_event(saved_pos->file_stream);
+
+ /* Add to heap */
+ ret = heap_insert(iter->stream_heap,
+ saved_pos->file_stream);
+ if (ret)
+ goto error;
+ }
+ } else if (iter_pos->u.seek_time) {
+ /* not yet implemented */
+ return -1;
+ } else {
+ /* nowhere to seek to */
+ return -1;
+ }
+
+ return 0;
+error:
+ heap_free(iter->stream_heap);
+error_heap_init:
+ g_free(iter->stream_heap);
+ return -1;
+}
+
+struct bt_iter_pos *bt_iter_get_pos(struct bt_iter *iter)
+{
+ struct bt_iter_pos *pos;
+ struct trace_collection *tc = iter->ctx->tc;
+ int i, stream_class_id, stream_id;
+
+ pos = g_new0(struct bt_iter_pos, 1);
+ if (!pos) {
+ perror("allocating bt_iter_pos");
+ goto error;
+ }
+
+ pos->u.restore = g_new0(struct bt_saved_pos, 1);
+ if (!pos->u.restore) {
+ perror("allocating bt_saved_pos");
+ goto error;
+ }
+
+ pos->u.restore->tc = tc;
+ pos->u.restore->stream_saved_pos = g_array_new(FALSE, TRUE,
+ sizeof(struct stream_saved_pos));
+ if (!pos->u.restore->stream_saved_pos)
+ goto error;
+
+ 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_class_id = 0; stream_class_id < tin->streams->len;
+ stream_class_id++) {
+ struct ctf_stream_class *stream_class;
+
+ stream_class = g_ptr_array_index(tin->streams,
+ stream_class_id);
+ for (stream_id = 0;
+ stream_id < stream_class->streams->len;
+ stream_id++) {
+ struct ctf_stream *stream;
+ struct ctf_file_stream *cfs;
+ struct stream_saved_pos saved_pos;
+
+ stream = g_ptr_array_index(
+ stream_class->streams,
+ stream_id);
+ cfs = container_of(stream,
+ struct ctf_file_stream,
+ parent);
+
+ saved_pos.file_stream = cfs;
+ saved_pos.cur_index = cfs->pos.cur_index;
+
+ /*
+ * It is possible that an event was read during
+ * the last restore, never consumed and its
+ * position saved again. For this case, we
+ * need to check if the event really was
+ * consumed by the caller otherwise it is lost.
+ */
+ if (stream->consumed)
+ saved_pos.offset = cfs->pos.offset;
+ else
+ saved_pos.offset = cfs->pos.last_offset;
+
+ saved_pos.current_timestamp = stream->timestamp;
+
+ g_array_append_val(
+ pos->u.restore->stream_saved_pos,
+ saved_pos);
+
+ printf_debug("stream : %lu, cur_index : %zd, "
+ "offset : %zd, "
+ "timestamp = %" PRIu64 "\n",
+ stream->stream_id, saved_pos.cur_index,
+ saved_pos.offset,
+ saved_pos.current_timestamp);
+ }
+ }
+ }
+
+ return pos;
+
+error:
+ return NULL;
+}
+
/*
* babeltrace_filestream_seek: seek a filestream to given position.
*
int ret = 0;
struct bt_iter *iter;
- iter = malloc(sizeof(struct bt_iter));
+ iter = g_new0(struct bt_iter, 1);
if (!iter)
goto error_malloc;
iter->stream_heap = g_new(struct ptr_heap, 1);
error_heap_init:
g_free(iter->stream_heap);
error_ctx:
- free(iter);
+ g_free(iter);
error_malloc:
return NULL;
}
bt_context_put(iter->ctx);
- free(iter);
+ g_free(iter);
}
int bt_iter_next(struct bt_iter *iter)
projects / babeltrace.git / blobdiff