在一个信号计数器释放之前，其他 7 个线程都处于空闲状态。
The other seven are held at bay until one of the semaphore counts is released.
在信号计数器信号量的方法和整数参数之间的理解差异？
Difference in understanding between semaphore counter and semaphore methods integer parameter?
lpPreviousCount是指向上一个信号量计数器返回时的变量的指针。
LpPreviousCount is the pointer to the variable where the previous semaphore count is returned.
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