In VAX/VMS, a semaphore that is used to control exclusive access to a region of code that can share a data structure or other resource. The mutex (mutual exclusion) semaphore ensures that only one process at a time has access to the region of code.

• 操作系统VAX/VMS中的一种通信方法,用于控制对共享一数据结构或其它资源的一个码区的排它性访问。这种互斥通信法保证在同一时间仅有一个进程访问此码区。