MSGQ_SYNC_REQUESTED indicates that the routine slept for less than the requested number of milliseconds and that the next synchronization should begin immediately if a synchronization is not currently in progress.

• MSGQ_SYNC_REQUESTED表示例程休眠的时间少于请求的毫秒数,并且如果当前没有同步操作,应立即开始下一个同步。