EDS, an HP company 是全球信息服务业领导者之一,以协助全球客户提高企业的运营绩效。另有EDS (能谱,Energy Dispersive Spectrometer),EDS电气设计软件包
应用程序创建信号量集需要调用semget(2)。系统中每个信号量集由一个semds_id数据结构描述,其中包括以下元素:struct semid_ds {
struct ipc_perm sem_perm/* operation permission struct */
struct sem *sem_base/* ptr to first semaphore in set */
ushort_t sem_nsems/* # of semaphores in set */
#if defined(_LP64)
time_t sem_otime/* last semop time */
time_t sem_ctime/* last change time */
#else /*_LP64*/
time_t sem_otime/* last semop time */
int32_t sem_pad1/* reserved for time_t expansion */
time_t sem_ctime/* last change time */
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