Josh stands facing the rear and semaphoring the driver's intentions to frustrated queues of following cars.
乔希

方站
,
语

受阻的车流示意司机的意图。
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A " traffic signal" – sometimes called a " semaphore, " only by me I think – means a box with three lights – one is red, one is yellow, one is green – that tells you if you need to stop, that's the red color, of course.
一个“交通信
灯” ——有时被称为“信
灯”,我觉得只有我会
么说——意味着一个装有三个灯的盒子——一个是红色的, 一个是黄色的, 一个是绿色的——它告诉你是否需要停
,红色表示需要停
, 当然。
A guarantee of exclusive access to a shared resource. In embedded systems, the shared resource is typically a block of memory, a global variable, or a set of registers. Mutual exclusion can be achieved with the use of a semaphore or mutex.
唯一访问共享资源的保证。在嵌入式系统中,共享的资源典型的有内存块或寄存器组。互斥现象能由使用信
灯或互斥完成。