- int ret = 0;
- size_t i;
- uint64_t timestamp_begin, timestamp_end;
- struct bt_ctf_field *integer = NULL;
- struct bt_ctf_stream_pos packet_context_pos;
- struct bt_ctf_trace *trace;
- enum bt_ctf_byte_order native_byte_order;
- bool empty_packet;
- uint64_t packet_size_bits;
- struct {
- bool timestamp_begin;
- bool timestamp_end;
- bool content_size;
- bool packet_size;
- } auto_set_fields = { 0 };
-
- if (!stream || stream->pos.fd < 0) {
- /*
- * Stream does not have an associated fd. It is,
- * therefore, not a stream being used to write events.
- */
- ret = -1;
- goto end;
- }
-
- if (!stream->packet_context && stream->flushed_packet_count > 0) {
- /*
- * A stream without a packet context, and thus without
- * content and packet size members, can't have more than
- * one packet.
- */
- ret = -1;
- goto end;
- }
-
- trace = bt_ctf_stream_class_borrow_trace(stream->stream_class);
- assert(trace);
- native_byte_order = bt_ctf_trace_get_byte_order(trace);
- empty_packet = (stream->events->len == 0);
-
- /* mmap the next packet */
- bt_ctf_stream_pos_packet_seek(&stream->pos, 0, SEEK_CUR);
- ret = bt_ctf_field_serialize(stream->packet_header, &stream->pos,
- native_byte_order);
- if (ret) {
- goto end;
- }
-
- if (stream->packet_context) {
- /* Set the default context attributes if present and unset. */
- if (!empty_packet && !get_event_header_timestamp(
- ((struct bt_ctf_event *) g_ptr_array_index(
- stream->events, 0))->event_header, ×tamp_begin)) {
- ret = try_set_structure_field_integer(
- stream->packet_context,
- "timestamp_begin", timestamp_begin);
- if (ret < 0) {
- goto end;
- }
- auto_set_fields.timestamp_begin = ret == 1;
- }
-
- if (!empty_packet && !get_event_header_timestamp(
- ((struct bt_ctf_event *) g_ptr_array_index(
- stream->events, stream->events->len - 1))->event_header,
- ×tamp_end)) {
-
- ret = try_set_structure_field_integer(
- stream->packet_context,
- "timestamp_end", timestamp_end);
- if (ret < 0) {
- goto end;
- }
- auto_set_fields.timestamp_end = ret == 1;
- }
- ret = try_set_structure_field_integer(stream->packet_context,
- "content_size", UINT64_MAX);
- if (ret < 0) {
- goto end;
- }
- auto_set_fields.content_size = ret == 1;
-
- ret = try_set_structure_field_integer(stream->packet_context,
- "packet_size", UINT64_MAX);
- if (ret < 0) {
- goto end;
- }
- auto_set_fields.packet_size = ret == 1;
-
- /* Write packet context */
- memcpy(&packet_context_pos, &stream->pos,
- sizeof(packet_context_pos));
- ret = bt_ctf_field_serialize(stream->packet_context,
- &stream->pos, native_byte_order);
- if (ret) {
- goto end;
- }
- }
-
- for (i = 0; i < stream->events->len; i++) {
- struct bt_ctf_event *event = g_ptr_array_index(
- stream->events, i);
-
- /* Write event header */
- ret = bt_ctf_field_serialize(event->event_header,
- &stream->pos, native_byte_order);
- if (ret) {
- goto end;
- }
-
- /* Write stream event context */
- if (event->stream_event_context) {
- ret = bt_ctf_field_serialize(
- event->stream_event_context, &stream->pos,
- native_byte_order);
- if (ret) {
- goto end;
- }
- }
-
- /* Write event content */
- ret = bt_ctf_event_serialize(event, &stream->pos,
- native_byte_order);
- if (ret) {
- goto end;
- }
- }
-
- /* Rounded-up in case content_size is not byte-aligned. */
- packet_size_bits = (stream->pos.offset + (CHAR_BIT - 1)) &
- ~(CHAR_BIT - 1);
- stream->pos.packet_size = packet_size_bits;
-
- if (stream->packet_context) {
- /*
- * Update the packet total size and content size and overwrite
- * the packet context.
- * Copy base_mma as the packet may have been remapped (e.g. when
- * a packet is resized).
- */
- packet_context_pos.base_mma = stream->pos.base_mma;
- if (auto_set_fields.content_size) {
- ret = set_structure_field_integer(
- stream->packet_context,
- "content_size", stream->pos.offset);
- if (ret < 0) {
- goto end;
- }
- }
-
- if (auto_set_fields.packet_size) {
- ret = set_structure_field_integer(stream->packet_context,
- "packet_size", packet_size_bits);
- if (ret < 0) {
- goto end;
- }
- }
-
- ret = bt_ctf_field_serialize(stream->packet_context,
- &packet_context_pos, native_byte_order);
- if (ret) {
- goto end;
- }
- }
-
- g_ptr_array_set_size(stream->events, 0);
- stream->flushed_packet_count++;
- stream->size += packet_size_bits / CHAR_BIT;
-end:
- /* Reset automatically-set fields. */
- if (auto_set_fields.timestamp_begin) {
- reset_structure_field(stream->packet_context,
- "timestamp_begin");
- }
- if (auto_set_fields.timestamp_end) {
- reset_structure_field(stream->packet_context,
- "timestamp_end");
- }
- if (auto_set_fields.packet_size) {
- reset_structure_field(stream->packet_context,
- "packet_size");
- }
- if (auto_set_fields.content_size) {
- reset_structure_field(stream->packet_context,
- "content_size");
- }
- bt_put(integer);
-
- if (ret < 0) {
- /*
- * We failed to write the packet. Its size is therefore set to 0
- * to ensure the next mapping is done in the same place rather
- * than advancing by "stream->pos.packet_size", which would
- * leave a corrupted packet in the trace.
- */
- stream->pos.packet_size = 0;
- }
- return ret;
-}
-
-void bt_ctf_stream_get(struct bt_ctf_stream *stream)
-{
- bt_get(stream);