Smithsonian Magazine on MSN6 天
Chaotic Traffic From Horse-Drawn Carriages Inspired the World's First Traffic Lights
Even before there were cars, there was treacherous traffic in Westminster, one of London’s most bustling boroughs, teeming ...
Engineering360 News6 年
Chapter 10: Event Notification and Synchronization with Counting Semaphores
ThreadX provides 32-bit counting semaphores with counts that range in value from 0 to 2 32 1, or 4,294,967,295 (inclusive). There are two operations that affect the values of counting semaphores: ...