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Here are the following advantages of the mutex, such as: If the mutex object is already locked, the process desiring to acquire the lock on the mutex object has to wait and is queued up by the system till the mutex object is unlocked.

Meanwhile, a process has acquired the lock on the mutex object, and no other thread or process can access that resource. Then the next process is allowed to acquire the lock on the mutex object. Whenever the program thread wants to use the resource, it occupies lock on mutex object, utilizes the resource and after use, it releases the lock on mutex object. The system creates the mutex object with a unique name or ID. When a program starts, it requests the system to create a mutex object for a given resource. In Mutex lock, all the time, only a single thread can work with the entire buffer. As long as the producer fills the buffer, the user needs to wait, and vice versa. This is shown with the help of the following example,Ī mutex provides mutual exclusion, either producer or consumer who can have the key (mutex) and proceed with their work. However, priority inheritance does not correct priority inversion but only minimizes its effect. It allows current higher priority tasks to be kept in the blocked state for the shortest time possible. It includes a priority inheritance mechanism to avoid extended priority inversion problems. It is a special type of binary semaphore used for controlling access to the shared resource. This thread only releases the mutex when it exits in the critical section. The mutex locking mechanism ensures only one thread can acquire the mutex and enter the critical section. It is created with a unique name at the start of a program. Mutex is a mutual exclusion object that synchronizes access to a resource. Mutex and semaphore both provide synchronization services, but they are not the same. But hardware solutions for critical section problems are quite difficult to implement.

QNX SEMAPHOR SOFTWARE

Both the software and hardware solutions are present for handling critical section problems. Process synchronization plays an important role in maintaining the consistency of shared data. As per operating system terminology, mutex and semaphores are kernel resources that provide synchronization services, also called synchronization primitives.

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