-
-BT_HIDDEN
-void bt_ctf_stream_update_clock_value(struct bt_ctf_stream *stream,
- struct bt_ctf_field *value_field)
-{
- struct bt_ctf_field_type *value_type = NULL;
- struct bt_ctf_clock *clock = NULL;
- uint64_t requested_new_value;
- uint64_t requested_new_value_mask;
- uint64_t *cur_value;
- uint64_t cur_value_masked;
- int requested_new_value_size;
- int ret;
-
- assert(stream);
- assert(clock);
- assert(value_field);
- value_type = bt_ctf_field_get_type(value_field);
- assert(value_type);
- clock = bt_ctf_field_type_integer_get_mapped_clock(value_type);
- assert(clock);
- requested_new_value_size =
- bt_ctf_field_type_integer_get_size(value_type);
- assert(requested_new_value_size > 0);
- ret = bt_ctf_field_unsigned_integer_get_value(value_field,
- &requested_new_value);
- assert(!ret);
- cur_value = g_hash_table_lookup(stream->clock_values, clock);
-
- if (!cur_value) {
- /*
- * Updating the value of a clock which is not registered
- * yet, so register it with the new value as its initial
- * value.
- */
- uint64_t *requested_new_value_ptr = g_new0(uint64_t, 1);
-
- *requested_new_value_ptr = requested_new_value;
- g_hash_table_insert(stream->clock_values, clock,
- requested_new_value_ptr);
- goto end;
- }
-
- /*
- * Special case for a 64-bit new value, which is the limit
- * of a clock value as of this version: overwrite the
- * current value directly.
- */
- if (requested_new_value_size == 64) {
- *cur_value = requested_new_value;
- goto end;
- }
-
- requested_new_value_mask = (1ULL << requested_new_value_size) - 1;
- cur_value_masked = *cur_value & requested_new_value_mask;
-
- if (requested_new_value < cur_value_masked) {
- /*
- * It looks like a wrap happened on the number of bits
- * of the requested new value. Assume that the clock
- * value wrapped only one time.
- */
- *cur_value += requested_new_value_mask + 1;
- }
-
- /* Clear the low bits of the current clock value */
- *cur_value &= ~requested_new_value_mask;
-
- /* Set the low bits of the current clock value */
- *cur_value |= requested_new_value;
-
-end:
- bt_put(clock);
- bt_put(value_type);
-}