wait

pub fn wait(ws: *WebServer) RunnerRequest {
    ws.runner_request_mutex.lock();
    defer ws.runner_request_mutex.unlock();
    while (true) {
        if (ws.runner_request) |req| {
            ws.runner_request = null;
            ws.runner_request_empty_cond.signal();
            return req;
        }
        ws.runner_request_ready_cond.wait(&ws.runner_request_mutex);
    }
}