-static void clock_add(gpointer key, gpointer value, gpointer user_data)
-{
- GHashTable *tc_clocks = user_data;
- struct ctf_clock *t_clock = value;
- GQuark v;
-
- if (t_clock->absolute)
- v = t_clock->name;
- else
- v = t_clock->uuid;
- if (v) {
- struct ctf_clock *tc_clock;
-
- tc_clock = g_hash_table_lookup(tc_clocks,
- (gpointer) (unsigned long) v);
- if (!tc_clock) {
- g_hash_table_insert(tc_clocks,
- (gpointer) (unsigned long) v,
- value);
- } else {
- int64_t diff_ns;
-
- /*
- * Check that the offsets match. If not, warn
- * the user that we do an arbitrary choice.
- */
- diff_ns = tc_clock->offset_s;
- diff_ns -= t_clock->offset_s;
- diff_ns *= 1000000000ULL;
- diff_ns += tc_clock->offset;
- diff_ns -= t_clock->offset;
- printf_debug("Clock \"%s\" offset between traces has a delta of %" PRIu64 " ns.",
- g_quark_to_string(tc_clock->name),
- diff_ns < 0 ? -diff_ns : diff_ns);
- if (diff_ns > 10000) {
- fprintf(stderr, "[warning] Clock \"%s\" offset differs between traces (delta %" PRIu64 " ns). Choosing one arbitrarily.\n",
- g_quark_to_string(tc_clock->name),
- diff_ns < 0 ? -diff_ns : diff_ns);
- }
- }
- }
-}
-
-/*
- * Whenever we add a trace to the trace collection, check that we can
- * correlate this trace with at least one other clock in the trace.
- */
-static int trace_collection_add(struct trace_collection *tc,
- struct trace_descriptor *td)
-{
- struct ctf_trace *trace = container_of(td, struct ctf_trace, parent);
-
- g_ptr_array_add(tc->array, td);
-
- if (tc->array->len > 1) {
- struct clock_match clock_match = {
- .clocks = tc->clocks,
- .clock_match = NULL,
- };
-
- /*
- * With two or more traces, we need correlation info
- * avalable.
- */
- g_hash_table_foreach(trace->clocks,
- check_clock_match,
- &clock_match);
- if (!clock_match.clock_match) {
- fprintf(stderr, "[error] No clocks can be correlated and multiple traces are added to the collection.\n");
- goto error;
- }
- }
- /*
- * Add each clock from the trace clocks into the trace
- * collection clocks.
- */
- g_hash_table_foreach(trace->clocks,
- clock_add,
- tc->clocks);
- return 0;
-error:
- return -EPERM;
-}