Function init_once

harmony/api12/acl_one/acl/src/main/cpp/logger.cpp:107–111

}

static void init_once() {
    s_write_callback = write_callback;
    acl_msg_register(open_callback, nullptr, log_callback, nullptr);
    acl_msg_open("dummy.txt", "dummy");
}

static acl_pthread_once_t s_init_once = ACL_PTHREAD_ONCE_INIT;