Function StartDummyServerAt

src/brpc/server.cpp:1930–1958

static Server* g_dummy_server = NULL;

int StartDummyServerAt(int port, ProfilerLinker) {
    if (port < 0 || port >= 65536) {
        LOG(ERROR) << "Invalid port=" << port;
        return -1;
    }
    if (g_dummy_server == NULL) {  // (1)
        BAIDU_SCOPED_LOCK(g_dummy_server_mutex);
        if (g_dummy_server == NULL) {
            Server* dummy_server = new Server;
            dummy_server->set_version(butil::string_printf(
                        "DummyServerOf(%s)", GetProgramName()));
            ServerOptions options;
            options.num_threads = 0;
            options.bthread_tag = bthread_self_tag();
            if (dummy_server->Start(port, &options) != 0) {
                LOG(ERROR) << "Fail to start dummy_server at port=" << port;
                return -1;
            }
            // (1) may see uninitialized dummy_server due to relaxed memory
            // fencing, but we only expose a function to test existence
            // of g_dummy_server, everything should be fine.
            g_dummy_server = dummy_server;
            return 0;
        }
    }
    LOG(ERROR) << "Already have dummy_server at port="
               << g_dummy_server->listen_address().port;
    return -1;
}

bool IsDummyServerRunning() {
    return g_dummy_server != NULL;