#include <babeltrace/babeltrace.h>
#include <babeltrace/callbacks-internal.h>
#include <babeltrace/context.h>
+#include <babeltrace/context-internal.h>
#include <babeltrace/ctf/metadata.h>
#include <babeltrace/iterator-internal.h>
#include <babeltrace/iterator.h>
#include <babeltrace/prio_heap.h>
+#include <babeltrace/ctf/events.h>
#include <inttypes.h>
struct stream_saved_pos {
g_free(iter_pos);
}
+/*
+ * seek_file_stream_by_timestamp
+ *
+ * Browse a filestream by index, if an index contains the timestamp passed in
+ * argument, seek inside the corresponding packet it until we find the event we
+ * are looking for (either the exact timestamp or the event just after the
+ * timestamp).
+ *
+ * Return 0 if the seek succeded and EOF if we didn't find any packet
+ * containing the timestamp.
+ */
+static int seek_file_stream_by_timestamp(struct ctf_file_stream *cfs,
+ uint64_t timestamp)
+{
+ struct ctf_stream_pos *stream_pos;
+ struct packet_index *index;
+ int i, ret;
+
+ stream_pos = &cfs->pos;
+ for (i = 0; i < stream_pos->packet_index->len; i++) {
+ index = &g_array_index(stream_pos->packet_index,
+ struct packet_index, i);
+ if (index->timestamp_begin >= timestamp ||
+ index->timestamp_end <= timestamp)
+ continue;
+
+ stream_pos->cur_index = i;
+ stream_pos->move_pos_slow(stream_pos, index->offset, SEEK_SET);
+ while (cfs->parent.timestamp < timestamp) {
+ ret = stream_read_event(cfs);
+ if (ret < 0)
+ break;
+ }
+ return 0;
+ }
+ return EOF;
+}
+
+/*
+ * seek_ctf_trace_by_timestamp : for each file stream, seek to the event with
+ * the corresponding timestamp
+ *
+ * Return 0 on success.
+ * If the timestamp is not part of any file stream, return EOF to inform the
+ * user the timestamp is out of the scope
+ */
+static int seek_ctf_trace_by_timestamp(struct ctf_trace *tin,
+ uint64_t timestamp, struct ptr_heap *stream_heap)
+{
+ int i, j, ret;
+ int found = EOF;
+
+ /* for each stream_class */
+ for (i = 0; i < tin->streams->len; i++) {
+ struct ctf_stream_class *stream_class;
+
+ stream_class = g_ptr_array_index(tin->streams, i);
+ /* for each file_stream */
+ for (j = 0; j < stream_class->streams->len; j++) {
+ struct ctf_stream *stream;
+ struct ctf_file_stream *cfs;
+
+ stream = g_ptr_array_index(stream_class->streams, j);
+ cfs = container_of(stream, struct ctf_file_stream,
+ parent);
+ ret = seek_file_stream_by_timestamp(cfs, timestamp);
+ if (ret == 0) {
+ /* Add to heap */
+ ret = heap_insert(stream_heap, cfs);
+ if (ret)
+ goto error;
+ found = 0;
+ }
+ }
+ }
+
+ return found;
+
+error:
+ return -2;
+}
+
int bt_iter_set_pos(struct bt_iter *iter, const struct bt_iter_pos *iter_pos)
{
+ struct trace_collection *tc;
int i, ret;
- if (iter_pos->u.restore) {
- /* clear and recreate the heap */
+ switch (iter_pos->type) {
+ case BT_SEEK_RESTORE:
+ if (!iter_pos->u.restore)
+ goto error_arg;
+
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;
+ goto error;
for (i = 0; i < iter_pos->u.restore->stream_saved_pos->len;
i++) {
if (ret)
goto error;
}
- } else if (iter_pos->u.seek_time) {
- /* not yet implemented */
- return -1;
- } else {
- /* nowhere to seek to */
- return -1;
+ case BT_SEEK_TIME:
+ tc = iter->ctx->tc;
+
+ if (!iter_pos->u.seek_time)
+ goto error_arg;
+
+ heap_free(iter->stream_heap);
+ ret = heap_init(iter->stream_heap, 0, stream_compare);
+ if (ret < 0)
+ goto error;
+
+ /* for each trace in the trace_collection */
+ 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);
+
+ ret = seek_ctf_trace_by_timestamp(tin,
+ iter_pos->u.seek_time,
+ iter->stream_heap);
+ if (ret < 0)
+ goto error;
+ }
+ return 0;
+ default:
+ /* not implemented */
+ goto error_arg;
}
return 0;
+
+error_arg:
+ ret = -EINVAL;
error:
heap_free(iter->stream_heap);
-error_heap_init:
- g_free(iter->stream_heap);
- return -1;
+ if (heap_init(iter->stream_heap, 0, stream_compare) < 0) {
+ heap_free(iter->stream_heap);
+ g_free(iter->stream_heap);
+ iter->stream_heap = NULL;
+ ret = -ENOMEM;
+ }
+ return ret;
}
struct bt_iter_pos *bt_iter_get_pos(struct bt_iter *iter)
pos->u.restore->stream_saved_pos,
saved_pos);
- printf_debug("stream : %lu, cur_index : %zd, "
+ printf_debug("stream : %" PRIu64 ", cur_index : %zd, "
"offset : %zd, "
"timestamp = %" PRIu64 "\n",
stream->stream_id, saved_pos.cur_index,
return NULL;
}
+struct bt_iter_pos *bt_iter_create_time_pos(struct bt_iter *iter,
+ uint64_t timestamp)
+{
+ struct bt_iter_pos *pos;
+
+ pos = g_new0(struct bt_iter_pos, 1);
+ pos->type = BT_SEEK_TIME;
+ pos->u.seek_time = timestamp;
+ return pos;
+}
+
/*
* babeltrace_filestream_seek: seek a filestream to given position.
*
struct bt_callback_chain *bt_chain;
int i, j;
- heap_free(iter->stream_heap);
- g_free(iter->stream_heap);
+ if (iter->stream_heap) {
+ heap_free(iter->stream_heap);
+ g_free(iter->stream_heap);
+ }
/* free all events callbacks */
if (iter->main_callbacks.callback)
return ret;
}
-int bt_iter_read_event(struct bt_iter *iter,
- struct ctf_stream **stream,
- struct ctf_stream_event **event)
+struct bt_ctf_event *bt_iter_read_ctf_event(struct bt_iter *iter)
{
struct ctf_file_stream *file_stream;
- int ret = 0;
+ struct bt_ctf_event *ret = &iter->current_ctf_event;
file_stream = heap_maximum(iter->stream_heap);
if (!file_stream) {
/* end of file for all streams */
- ret = EOF;
- goto end;
+ goto stop;
}
- *stream = &file_stream->parent;
- *event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id);
+ ret->stream = &file_stream->parent;
+ ret->event = g_ptr_array_index(ret->stream->events_by_id,
+ ret->stream->event_id);
- if ((*stream)->stream_id > iter->callbacks->len)
+ if (ret->stream->stream_id > iter->callbacks->len)
goto end;
- process_callbacks(iter, *stream);
+ process_callbacks(iter, ret->stream);
end:
return ret;
+stop:
+ return NULL;
}
projects / babeltrace.git / blobdiff