System V Semaphores

1.0 Semaphores

A semaphore is a mechanism for synchronizing processes and threads. Semaphore, in Unix-like systems, are provided under interprocess communication (IPC) facilities along with message queues and shared memory. While message queues can be used by themselves for interprocess communication, semaphores are needed for implementing shared memory based interprocess communication systems.… Read more

Semaphore Basics

1.0 BACKGROUND

Semaphore

A semaphore is a signalling mechanism used to regulate access to a shared resource like a railroad track. A semaphore is used to signal to the driver of a train whether he can go ahead on the track or not.… Read more