Semaphore in os: In multiprogramming systems

In multiprogramming systems, multiple processes may need to access shared resources like files, printers, or memory. To handle this, operating systems use synchronization mechanisms. One of the most widely used mechanisms is the Semaphore . Semaphore is an important concept to learn if you want to know how an Operating System manages shared system resources. It is a very crucial topic upon which questions appear in all sorts of computer science-based competitive exams. A Semaphore can be described as an object that consists of a counter, a waiting list of processes, Signal and Wait functions. The most basic use of semaphore is to initialize it to 1. When a thread want to enter a critical section, it calls down and enter the section. When another thread tries to do the same thing, the operation system will put it to the sleep because the value of semaphore is already zero due to previous call to down. When first thread is finished with the critical section ... A semaphore is a tool used in computer science to manage how multiple programs or processes access shared resources, like memory or files, without causing conflicts. Semaphores are compound data types with two fields one is a Non-negative integer S.V ( Semaphore Value) and the second is a set of processes in a queue S.L ( Semaphore List or Queue). It is used to solve critical section problems, and by using two atomic operations (wait and signal ). What is a Semaphore ? A semaphore is a tool ...