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1·short sem_op; (semaphore operation)

short sem_op; （信号量操作）

2·LpName is the name of the semaphore.

lpName是信号量的名称。

3·Semid is the semaphore set identifier.

semid是信号量集的标识符。

4·Unsigned short sem_num; (semaphore number).

unsigned short sem_num；(信号量个数)。

5·Use different types of semaphore classes

使用不同类型的信号量类

6·A type of semaphore with just two states.

一种只有两种状态的信号。

7·Semflg are permissions on the new semaphore set.

semflg是这个新信号量集的权限。

8·Then it atomically decreases the semaphore count.

然后它自动地减少信号的计数值。

9·If this is null, the semaphore cannot be inherited.

如果这个指针为空，那么这个信号量就不能被继承。

10·Nsems is the number of semaphores in the semaphore set.

nsems是这个信号量集中信号量的数量。