这其中每个变量都是根据设备特性而使用的。
Each of these variants is used depending on the device characteristics.
访问实际硬件(卡)寄存器的代码现在应该进行一些修改，访问模拟设备寄存器的本地变量。
The code that accesses the actual card registers should now be changed to access the local variables that mimic the device's registers.
竞争条件的典型解决方案是，确保程序在使用某个资源（比如文件、设备、对象或者变量） 时，拥有自己的专有权。
The typical solution to a race condition is to ensure that your program has exclusive rights to something while it's manipulating it, such as a file, device, object, or variable.
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