The Semaphore structure is defined in the header file /include/linux/semaphore.h. The structure is shown below lock – spinlock that is to acquire the resource count – The count of the number of instances of the resource the semaphore provides access wait_list – a list of processes that are waiting to obtain the lock The semaphore […]

Another synchronization mechanism that is provided in the Linux kernel is the Semaphore. It provides the ability for multiple kernel processes/threads to access a resource simultaneously using a “count” value. If the “count” value is 1, then the semaphore is similar to a mutual exclusion lock (Mutex). However, a Semaphore does not have the same […]