0 a system of communication using two flags held in your hands that are moved into different positions to represent different letters, numbers, or symbols --
The semaphore principle in approaching legislation is not always the best guide.
The next point on signalling where this system might be of advantage is in connection with the system of sending signals by semaphore or light.
I agree that there are problems associated with flashing indicators and with the semaphore type as well.
As a result, the semaphore is locked.
Stoughton (1981) compares access control and information flow in a simple imperative language with semaphores.
The following example defines a simple reactive system where a set of user processes interact with a binary semaphore which provides mutual exclusion in the access to a critical region.
Before the process gets back, it posts the semaphore to unlock the data.
Two important features of semaphores make them the ideal candidates for the means of synchronization for data dependency and data consistency (mutual exclusion).
