单体驱动的源代码由中断服务线程和平台相关的代码组成。
Source code for a monolithic driver consists of both interrupt service thread code and platform specific code.
如果任务生吞中断请求，则worker线程将不知道有一个被请求的中断，从而耽误应用程序或服务的关闭。
If the task were to swallow the interrupt request, the worker thread might not learn that an interrupt was requested, which could delay the application or service shutdown.
可以保证线程与中断服务代码的互斥。
It ensures mutual exclusion among threads but also interrupt handling code.
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