主消息循环关闭后，应用程序将退出。
When the main message loop is closed, the application exits.
report_allocations report_allocations将报告在应用程序退出时所有未释放的内存分配。
Report_allocations report_allocations reports all memory allocations that were not freed at application exit.
如果应用程序将超时设置为数秒钟，则会在给定时间内退出，取消锁定应用程序，然后要求您稍后返回以完成事务。
If the application has set a timeout for several seconds, it exits in a given amount of time, unlocks the application, then asks you to return later to finish your transaction.
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