Function ResetSpanDB

src/brpc/span.cpp:544–557

}

static void ResetSpanDB(SpanDB* db) {
    SpanDB* old_db = NULL;
    {
        BAIDU_SCOPED_LOCK(g_span_db_mutex);
        old_db = g_span_db;
        g_span_db = db;
        if (g_span_db) {
            g_span_db->AddRefManually();
        }
    }
    if (old_db) {
        old_db->RemoveRefManually();
    }
}

static void RemoveSpanDB() {
    g_span_ending = true;