Search Google with: "Linux semaphores" and have a look through the websites on the subject.
No, of course not. For example processes, memory-pages, environment variables and semaphores are not treated as files.
As the use of semaphores in the past has caused more problems than created solutions therefore semaphores are not use in the producer and consumer problem.
SystemV IPC covers: messages (msgctl, msgget, msgrcv, msgsnd), semaphores (semctl, semget, semop) and shared memories (shmat, shmctl, shmdt, shmget)
send signals
Like condoms.
The use of semaphores
a semaphore is a stoplight and or traffic signal.
strong semaphores specify the order in which processes are removed from the queue, which guarantees avoiding starvation. Weak semaphores do not specify the order in which processes are removed from the queue.
They were called Semaphores.
the differents is the bathroom time
Three types of semaphores: 1.General/Counting semaphores: (can take any non-negative value) These are used when you might have multiple devices (like 3 printers or multiple memory buffers). 2.Binary semaphores: (can either be 0 or 1) These are used to gain exclusive access to a single resource (like the serial port, a non-reentrant library routine, or a hard disk drive). A counting semaphore that has a maximum value of 1 is equivalent to a binary semaphore (because the semaphore's value can only be 0 or 1). 3.Mutex semaphores: These are optimized for use in controlling mutually exclusive access to a resource. There are several implementations of this type of semaphore.
There are a number of ways the word semaphores might be used in a sentence. The definition of this word is that it is a system of sending messages using a series of flags in certain positions, signifying different messages with several meanings.