semaphore code的意思|示意

In Linux, the same semget call is used to open the semaphore with 0 as the value for the semflg: int semget (key, nsems, 0). In this code.

在Linux中，可以调用相同的semget来打开某个信号量，不过此时semflg的值为0：int semget (key, nsems, 0)。

This call also initializes the semaphore count: int sem_init(sem_t *sem, int pshared, unsigned int value). In this code

它还会对信号量计数器进行初始化：int sem_init(sem_t *sem, int pshared, unsigned int value)。

This is the code used to create the System V semaphore: int semget (key_t key, int nsems, int semflg). Following are the attributes to this code.

用来创建System v信号量使用的代码是：int semget (key_t key, int nsems, int semflg)。