| 术语 | semaphore |
| 释义 | semaphore 信号(量);［信号机］ 1. A variable that is used to enforce mutual exclusion. 一种用来实施互斥的变量。 2. An indicator used to control access to a file,for example, in a multiuser application, a flag that prevents simultaneous access to a file. 一种用于控制文件访问的指示符,例如在多用户应用(系统)中,为防止同时访问一个文件所设 置的标志。 3.A flag, a bit or combination of bits that indicates that a particular event has occurred during processing. In some systems, a “flag” is dealt with by software and a “semaphore” by hardware. 一种标志［记］,由一比特位或一比特组表示,指明某一特定事件在处理过程中已经出现。 在某些系统中,由软件处理的称之为标志(flag),由硬件处理的称之为信号(semaphore)。 4.In the concurrent processing of two interdependent programs, a control structure by which intermediate results are passed between programs. 两个互相关联的程序在并行处理的过程中使用的一种控制结构,采用这种结构, 可在两个程序之间传递中间结果。 5. In a multiprocessor system, a bit or combination of bits by which one processor indicates its status to others (or to the control processor), for example, a bit that is “set” when one transfer is completed and another one can begin. 在多处理机系统中使用的一种比特或比特组,某一处理机以此向其它处理机(或控制处理机) 指明自身的状态,例如,对某一比特置位,表示一个传送已经完成,另一个传送可以开始。 |
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